Merge pull request 'Add RSVP feature: submit RSVP, block on expired events' (#16) from 008-rsvp into master

Adds ExpiryDateBeforeEventException (400) when expiryDate <= eventDate,
asserts DB row count unchanged after every rejection in integration tests,
and replaces all hardcoded dates in EventServiceTest with TODAY-relative
expressions derived from the fixed Clock.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

.claude/hooks/frontend-check.sh

@@ -16,7 +16,7 @@ cd "$CLAUDE_PROJECT_DIR/frontend"
 ERRORS=""
 
 # Type-check
-if OUTPUT=$(npx vue-tsc --noEmit 2>&1); then
+if OUTPUT=$(npm run type-check 2>&1); then
     :
 else
     ERRORS+="Type-check failed:\n$OUTPUT\n\n"

.claude/hooks/run-tests.sh

@@ -26,7 +26,7 @@ PASSED=""
 
 # Run backend tests if Java sources changed
 if [[ -n "$HAS_BACKEND" ]]; then
-    if OUTPUT=$(cd backend && ./mvnw test -q 2>&1); then
+    if OUTPUT=$(cd backend && ./mvnw verify -q 2>&1); then
         PASSED+="✓ Backend tests passed. "
     else
         # Filter: only [ERROR] lines, skip Maven boilerplate

.claude/skills/merge-pr/SKILL.md

@@ -0,0 +1,94 @@
+---
+name: merge-pr
+description: Create a Gitea pull request, monitor CI pipeline status, and merge when green. Use this skill when the user asks to "create a PR", "merge the PR", "ship it", "make it ready to merge", or when you need to open a pull request and wait for CI before merging. Also use when asked to check CI/PR status on Gitea.
+---
+
+# Merge PR
+
+Create a pull request on Gitea, monitor the CI pipeline via the Actions API, and merge once all jobs pass.
+
+## Why this skill exists
+
+The Gitea MCP pull request API does not return CI status directly. To know if a PR is ready to merge, you must cross-reference the PR's `head.sha` with the Actions runs API, find the matching run, and check job conclusions. This skill encodes that workflow so it doesn't have to be rediscovered.
+
+## Prerequisites
+
+The Gitea MCP tools must be available. The key tools are:
+
+- `mcp__gitea__pull_request_write` (method: `create`, `merge`)
+- `mcp__gitea__pull_request_read` (method: `get`)
+- `mcp__gitea__actions_run_read` (methods: `list_runs`, `list_run_jobs`)
+
+If these tools are not yet loaded, use ToolSearch to discover and load them before proceeding.
+
+## Workflow
+
+### 1. Create the PR
+
+Use `mcp__gitea__pull_request_write` with method `create`. Include a clear title, body with summary and test plan, head branch, and base branch (usually `master`).
+
+Save the returned `head.sha` — you need it to find the CI run.
+
+### 2. Find the CI run for the PR
+
+The Actions API has no direct "get CI status for PR" call. Instead:
+
+```
+mcp__gitea__actions_run_read(method: "list_runs", owner, repo, perPage: 5)
+```
+
+Find the run whose `head_sha` matches the PR's `head.sha`. This is the CI run triggered by the push that the PR points to. If the branch was force-pushed or new commits were added, always match against the latest `head.sha` from a fresh `get` on the PR.
+
+### 3. Monitor job status
+
+Once you have the run ID:
+
+```
+mcp__gitea__actions_run_read(method: "list_run_jobs", owner, repo, run_id: <id>)
+```
+
+This returns all jobs with their `status` (queued/in_progress/completed) and `conclusion` (success/failure/skipped/null).
+
+Present a status table to the user:
+
+| Job | Status |
+|-----|--------|
+| backend-test | success |
+| frontend-test | in_progress |
+| frontend-e2e | queued |
+
+If jobs are still running, wait ~30 seconds and check again. Don't poll in a tight loop.
+
+### 4. Handle failures
+
+If any job has `conclusion: failure`:
+- Use `mcp__gitea__actions_run_read` with method `get_job_log_preview` to fetch the failing job's log
+- Report the failure to the user with relevant log output
+- Do NOT attempt to merge
+
+### 5. Merge when green
+
+Once all jobs show `conclusion: success` (or `skipped` for conditional jobs like `build-and-publish`):
+
+```
+mcp__gitea__pull_request_write(
+  method: "merge",
+  owner, repo,
+  index: <pr_number>,
+  merge_style: "merge",
+  delete_branch: true
+)
+```
+
+Ask the user for confirmation before merging. They may want to review the PR in the web UI first.
+
+### 6. Post-merge cleanup
+
+After a successful merge, suggest:
+- `git checkout master && git pull origin master`
+- `git branch -d <feature-branch>` (local cleanup)
+- Tagging a release if appropriate (see `/release` skill)
+
+## Abbreviated flow
+
+When the user just wants a quick status check (e.g. "how's the PR?"), skip straight to steps 2-3: find the run by SHA, show the job status table.

.gitea/workflows/ci.yaml

@@ -7,10 +7,10 @@ jobs:
   backend-test:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - name: Set up JDK 25
-        uses: actions/setup-java@v4
+        uses: actions/setup-java@v5
         with:
           distribution: temurin
           java-version: 25
@@ -21,10 +21,10 @@ jobs:
   frontend-test:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - name: Set up Node 24
-        uses: actions/setup-node@v4
+        uses: actions/setup-node@v6
         with:
           node-version: 24
 
@@ -49,10 +49,10 @@ jobs:
   frontend-e2e:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - name: Set up Node 24
-        uses: actions/setup-node@v4
+        uses: actions/setup-node@v6
         with:
           node-version: 24
 
@@ -66,7 +66,7 @@ jobs:
         run: cd frontend && npm run test:e2e
 
       - name: Upload Playwright report
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v7
         if: ${{ !cancelled() }}
         with:
           name: playwright-report
@@ -78,7 +78,7 @@ jobs:
     if: startsWith(github.ref, 'refs/tags/') && contains(github.ref_name, '.')
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - name: Parse SemVer tag
         id: semver

.gitignore

@@ -14,6 +14,9 @@ Thumbs.db
 .agent-tests/
 .ralph/*/iteration-*.jsonl
 
+# Test results (Playwright artifacts)
+test-results/
+
 # Java/Maven
 *.class
 *.jar

.specify/memory/constitution.md

@@ -107,8 +107,10 @@ Accessibility is a baseline requirement, not an afterthought.
   rationale. Never rewrite or delete the original decision.
 - The visual design system in `.specify/memory/design-system.md` is authoritative. All
   frontend implementation MUST follow it.
-- Research reports go to `docs/agents/research/`, implementation plans to
-  `docs/agents/plan/`.
+- Feature specs, research, and plans live in `specs/NNN-feature-name/`
+  (spec-kit format). Cross-cutting research goes to
+  `.specify/memory/research/`, cross-cutting plans to
+  `.specify/memory/plans/`.
 - Conversation and brainstorming in German; code, comments, commits, and
   documentation in English.
 - Documentation lives in the README. No wiki, no elaborate docs site.

.specify/memory/ideen.md

@@ -33,12 +33,16 @@ Person erstellt via App eine Veranstaltung und schickt seine Freunden irgendwie
 	* Updaten der Veranstaltung
 	* Einsicht angemeldete Gäste, kann bei Bedarf Einträge entfernen
 * Featureideen:
+	* Organisator kann einstellen, ob Attendee-Namensliste öffentlich auf der Event-Seite sichtbar ist (default: nur für Organisator). Wenn öffentlich, muss im RSVP-Bottom-Sheet eine Warnung angezeigt werden, dass der Name öffentlich sichtbar sein wird.
+	* Link-Previews (OpenGraph Meta-Tags): Generische OG-Tags mit App-Branding (z.B. "fete — Du wurdest eingeladen") damit geteilte Links in WhatsApp/Signal/Telegram hübsch aussehen. Keine Event-Daten an Crawler aus Privacy-Gründen. → Eigene User Story.
 	* Kalender-Integration: .ics-Download + optional webcal:// für Live-Updates bei Änderungen
 	* Änderungen zum ursprünglichen Inhalt (z.b. geändertes datum/ort) werden iwi hervorgehoben
 	* Veranstalter kann Updatenachrichten im Event posten, pro Device wird via LocalStorage gemerkt was man schon gesehen hat (Badge/Hervorhebung für neue Updates)
 	* QR Code generieren (z.B. für Plakate/Flyer)
 	* Ablaufdatum als Pflichtfeld, nach dem alle gespeicherten Daten gelöscht werden
 	* Übersichtsliste im LocalStorage: Alle Events die man zugesagt oder gemerkt hat (vgl. spliit)
+	* RSVP editieren: Gast kann seine bestehende Zusage bearbeiten (Name ändern via PUT mit rsvpToken) oder zurückziehen (DELETE mit rsvpToken). Bottom Sheet öffnet sich im Edit-Mode mit pre-filled Name + "Zusage zurückziehen"-Button. Später ergänzen: "Absagen und merken" (Kombination mit 011-bookmark-event). Ausgelagert aus 008-rsvp um den Scope klein zu halten.
+	* Organizer-Gästeliste: Namensliste der Zusagen nur für Organisator sichtbar (über Organizer-Link). Gehört thematisch zu 009-guest-list, nicht zu 008-rsvp.
 * Sicherheit/Missbrauchsschutz:
 	* Nicht-erratbare Event-Tokens (z.B. UUIDs)
 	* Event-Erstellung ist offen, kein Login/Passwort/Invite-Code nötig

CLAUDE.md

@@ -49,3 +49,10 @@ The following skills are available and should be used for their respective purpo
 - The loop runner is `ralph.sh`. Each run lives in its own directory under `.ralph/`.
 - Run directories contain: `instructions.md` (prompt), `chief-wiggum.md` (directives), `answers.md` (human answers), `questions.md` (Ralph's questions), `progress.txt` (iteration log), `meta.md` (metadata), `run.log` (execution log).
 - Project specifications (user stories, setup tasks, personas, etc.) live in `specs/` (feature dirs) and `.specify/memory/` (cross-cutting docs).
+
+## Active Technologies
+- Java 25 (backend), TypeScript 5.9 (frontend) + Spring Boot 3.5.x, Vue 3, Vue Router 5, openapi-fetch, openapi-typescript (007-view-event)
+- PostgreSQL (JPA via Spring Data, Liquibase migrations) (007-view-event)
+
+## Recent Changes
+- 007-view-event: Added Java 25 (backend), TypeScript 5.9 (frontend) + Spring Boot 3.5.x, Vue 3, Vue Router 5, openapi-fetch, openapi-typescript

Dockerfile

@@ -10,14 +10,14 @@ COPY backend/src/main/resources/openapi/api.yaml \
 RUN npm run build
 
 # Stage 2: Build backend with frontend assets baked in
-FROM eclipse-temurin:25-jdk-alpine AS backend-build
+FROM eclipse-temurin:25.0.2_10-jdk-alpine AS backend-build
 WORKDIR /app/backend
 COPY backend/ ./
 COPY --from=frontend-build /app/frontend/dist src/main/resources/static/
 RUN ./mvnw -B -DskipTests -Dcheckstyle.skip -Dspotbugs.skip package
 
 # Stage 3: Runtime
-FROM eclipse-temurin:25-jre-alpine
+FROM eclipse-temurin:25.0.2_10-jre-alpine
 WORKDIR /app
 COPY --from=backend-build /app/backend/target/*.jar app.jar
 EXPOSE 8080

backend/.mvn/wrapper/maven-wrapper.properties

@@ -1,3 +1,3 @@
 wrapperVersion=3.3.4
 distributionType=only-script
-distributionUrl=https://repo.maven.apache.org/maven2/org/apache/maven/apache-maven/3.9.12/apache-maven-3.9.12-bin.zip
+distributionUrl=https://repo.maven.apache.org/maven2/org/apache/maven/apache-maven/3.9.13/apache-maven-3.9.13-bin.zip

backend/pom.xml

@@ -179,7 +179,7 @@
             <plugin>
                 <groupId>org.codehaus.mojo</groupId>
                 <artifactId>build-helper-maven-plugin</artifactId>
-                <version>3.6.0</version>
+                <version>3.6.1</version>
                 <executions>
                     <execution>
                         <id>add-openapi-sources</id>

backend/src/main/java/de/fete/adapter/in/web/EventController.java

@@ -3,9 +3,24 @@ package de.fete.adapter.in.web;
 import de.fete.adapter.in.web.api.EventsApi;
 import de.fete.adapter.in.web.model.CreateEventRequest;
 import de.fete.adapter.in.web.model.CreateEventResponse;
+import de.fete.adapter.in.web.model.CreateRsvpRequest;
+import de.fete.adapter.in.web.model.CreateRsvpResponse;
+import de.fete.adapter.in.web.model.GetEventResponse;
+import de.fete.application.service.EventNotFoundException;
+import de.fete.application.service.InvalidTimezoneException;
 import de.fete.domain.model.CreateEventCommand;
 import de.fete.domain.model.Event;
+import de.fete.domain.model.EventToken;
+import de.fete.domain.model.Rsvp;
+import de.fete.domain.port.in.CountAttendeesByEventUseCase;
 import de.fete.domain.port.in.CreateEventUseCase;
+import de.fete.domain.port.in.CreateRsvpUseCase;
+import de.fete.domain.port.in.GetEventUseCase;
+import java.time.Clock;
+import java.time.DateTimeException;
+import java.time.LocalDate;
+import java.time.ZoneId;
+import java.util.UUID;
 import org.springframework.http.HttpStatus;
 import org.springframework.http.ResponseEntity;
 import org.springframework.web.bind.annotation.RestController;
@@ -15,19 +30,35 @@ import org.springframework.web.bind.annotation.RestController;
 public class EventController implements EventsApi {
 
   private final CreateEventUseCase createEventUseCase;
+  private final GetEventUseCase getEventUseCase;
+  private final CreateRsvpUseCase createRsvpUseCase;
+  private final CountAttendeesByEventUseCase countAttendeesByEventUseCase;
+  private final Clock clock;
 
-  /** Creates a new controller with the given use case. */
-  public EventController(CreateEventUseCase createEventUseCase) {
+  /** Creates a new controller with the given use cases and clock. */
+  public EventController(
+      CreateEventUseCase createEventUseCase,
+      GetEventUseCase getEventUseCase,
+      CreateRsvpUseCase createRsvpUseCase,
+      CountAttendeesByEventUseCase countAttendeesByEventUseCase,
+      Clock clock) {
     this.createEventUseCase = createEventUseCase;
+    this.getEventUseCase = getEventUseCase;
+    this.createRsvpUseCase = createRsvpUseCase;
+    this.countAttendeesByEventUseCase = countAttendeesByEventUseCase;
+    this.clock = clock;
   }
 
   @Override
   public ResponseEntity<CreateEventResponse> createEvent(
       CreateEventRequest request) {
+    ZoneId zoneId = parseTimezone(request.getTimezone());
+
     var command = new CreateEventCommand(
         request.getTitle(),
         request.getDescription(),
         request.getDateTime(),
+        zoneId,
         request.getLocation(),
         request.getExpiryDate()
     );
@@ -35,12 +66,55 @@ public class EventController implements EventsApi {
     Event event = createEventUseCase.createEvent(command);
 
     var response = new CreateEventResponse();
-    response.setEventToken(event.getEventToken());
-    response.setOrganizerToken(event.getOrganizerToken());
+    response.setEventToken(event.getEventToken().value());
+    response.setOrganizerToken(event.getOrganizerToken().value());
     response.setTitle(event.getTitle());
     response.setDateTime(event.getDateTime());
+    response.setTimezone(event.getTimezone().getId());
     response.setExpiryDate(event.getExpiryDate());
 
     return ResponseEntity.status(HttpStatus.CREATED).body(response);
   }
+
+  @Override
+  public ResponseEntity<GetEventResponse> getEvent(UUID token) {
+    var eventToken = new de.fete.domain.model.EventToken(token);
+    Event event = getEventUseCase.getByEventToken(eventToken)
+        .orElseThrow(() -> new EventNotFoundException(token));
+
+    var response = new GetEventResponse();
+    response.setEventToken(event.getEventToken().value());
+    response.setTitle(event.getTitle());
+    response.setDescription(event.getDescription());
+    response.setDateTime(event.getDateTime());
+    response.setTimezone(event.getTimezone().getId());
+    response.setLocation(event.getLocation());
+    response.setAttendeeCount(
+        (int) countAttendeesByEventUseCase.countByEvent(eventToken));
+    response.setExpired(
+        event.getExpiryDate().isBefore(LocalDate.now(clock)));
+
+    return ResponseEntity.ok(response);
+  }
+
+  @Override
+  public ResponseEntity<CreateRsvpResponse> createRsvp(
+      UUID token, CreateRsvpRequest createRsvpRequest) {
+    var eventToken = new EventToken(token);
+    Rsvp rsvp = createRsvpUseCase.createRsvp(eventToken, createRsvpRequest.getName());
+
+    var response = new CreateRsvpResponse();
+    response.setRsvpToken(rsvp.getRsvpToken().value());
+    response.setName(rsvp.getName());
+
+    return ResponseEntity.status(HttpStatus.CREATED).body(response);
+  }
+
+  private static ZoneId parseTimezone(String timezone) {
+    try {
+      return ZoneId.of(timezone);
+    } catch (DateTimeException e) {
+      throw new InvalidTimezoneException(timezone);
+    }
+  }
 }

backend/src/main/java/de/fete/adapter/in/web/GlobalExceptionHandler.java

@@ -1,6 +1,10 @@
 package de.fete.adapter.in.web;
 
+import de.fete.application.service.EventExpiredException;
+import de.fete.application.service.EventNotFoundException;
+import de.fete.application.service.ExpiryDateBeforeEventException;
 import de.fete.application.service.ExpiryDateInPastException;
+import de.fete.application.service.InvalidTimezoneException;
 import java.net.URI;
 import java.util.List;
 import java.util.Map;
@@ -44,6 +48,19 @@ public class GlobalExceptionHandler extends ResponseEntityExceptionHandler {
     return handleExceptionInternal(ex, problemDetail, headers, status, request);
   }
 
+  /** Handles expiry date before event date. */
+  @ExceptionHandler(ExpiryDateBeforeEventException.class)
+  public ResponseEntity<ProblemDetail> handleExpiryDateBeforeEvent(
+      ExpiryDateBeforeEventException ex) {
+    ProblemDetail problemDetail = ProblemDetail.forStatusAndDetail(
+        HttpStatus.BAD_REQUEST, ex.getMessage());
+    problemDetail.setTitle("Invalid Expiry Date");
+    problemDetail.setType(URI.create("urn:problem-type:expiry-date-before-event"));
+    return ResponseEntity.badRequest()
+        .contentType(MediaType.APPLICATION_PROBLEM_JSON)
+        .body(problemDetail);
+  }
+
   /** Handles expiry date validation failures. */
   @ExceptionHandler(ExpiryDateInPastException.class)
   public ResponseEntity<ProblemDetail> handleExpiryDateInPast(
@@ -57,6 +74,45 @@ public class GlobalExceptionHandler extends ResponseEntityExceptionHandler {
         .body(problemDetail);
   }
 
+  /** Handles RSVP on expired event. */
+  @ExceptionHandler(EventExpiredException.class)
+  public ResponseEntity<ProblemDetail> handleEventExpired(
+      EventExpiredException ex) {
+    ProblemDetail problemDetail = ProblemDetail.forStatusAndDetail(
+        HttpStatus.CONFLICT, ex.getMessage());
+    problemDetail.setTitle("Event Expired");
+    problemDetail.setType(URI.create("urn:problem-type:event-expired"));
+    return ResponseEntity.status(HttpStatus.CONFLICT)
+        .contentType(MediaType.APPLICATION_PROBLEM_JSON)
+        .body(problemDetail);
+  }
+
+  /** Handles event not found. */
+  @ExceptionHandler(EventNotFoundException.class)
+  public ResponseEntity<ProblemDetail> handleEventNotFound(
+      EventNotFoundException ex) {
+    ProblemDetail problemDetail = ProblemDetail.forStatusAndDetail(
+        HttpStatus.NOT_FOUND, ex.getMessage());
+    problemDetail.setTitle("Event Not Found");
+    problemDetail.setType(URI.create("urn:problem-type:event-not-found"));
+    return ResponseEntity.status(HttpStatus.NOT_FOUND)
+        .contentType(MediaType.APPLICATION_PROBLEM_JSON)
+        .body(problemDetail);
+  }
+
+  /** Handles invalid timezone. */
+  @ExceptionHandler(InvalidTimezoneException.class)
+  public ResponseEntity<ProblemDetail> handleInvalidTimezone(
+      InvalidTimezoneException ex) {
+    ProblemDetail problemDetail = ProblemDetail.forStatusAndDetail(
+        HttpStatus.BAD_REQUEST, ex.getMessage());
+    problemDetail.setTitle("Invalid Timezone");
+    problemDetail.setType(URI.create("urn:problem-type:invalid-timezone"));
+    return ResponseEntity.badRequest()
+        .contentType(MediaType.APPLICATION_PROBLEM_JSON)
+        .body(problemDetail);
+  }
+
   /** Catches all unhandled exceptions. */
   @ExceptionHandler(Exception.class)
   public ResponseEntity<ProblemDetail> handleAll(Exception ex) {

backend/src/main/java/de/fete/adapter/out/persistence/EventJpaEntity.java

@@ -34,6 +34,9 @@ public class EventJpaEntity {
   @Column(name = "date_time", nullable = false)
   private OffsetDateTime dateTime;
 
+  @Column(nullable = false, length = 64)
+  private String timezone;
+
   @Column(length = 500)
   private String location;
 
@@ -103,6 +106,16 @@ public class EventJpaEntity {
     this.dateTime = dateTime;
   }
 
+  /** Returns the IANA timezone name. */
+  public String getTimezone() {
+    return timezone;
+  }
+
+  /** Sets the IANA timezone name. */
+  public void setTimezone(String timezone) {
+    this.timezone = timezone;
+  }
+
   /** Returns the event location. */
   public String getLocation() {
     return location;

backend/src/main/java/de/fete/adapter/out/persistence/EventPersistenceAdapter.java

@@ -1,9 +1,11 @@
 package de.fete.adapter.out.persistence;
 
 import de.fete.domain.model.Event;
+import de.fete.domain.model.EventToken;
+import de.fete.domain.model.OrganizerToken;
 import de.fete.domain.port.out.EventRepository;
+import java.time.ZoneId;
 import java.util.Optional;
-import java.util.UUID;
 import org.springframework.stereotype.Repository;
 
 /** Persistence adapter implementing the EventRepository outbound port. */
@@ -25,18 +27,19 @@ public class EventPersistenceAdapter implements EventRepository {
   }
 
   @Override
-  public Optional<Event> findByEventToken(UUID eventToken) {
-    return jpaRepository.findByEventToken(eventToken).map(this::toDomain);
+  public Optional<Event> findByEventToken(EventToken eventToken) {
+    return jpaRepository.findByEventToken(eventToken.value()).map(this::toDomain);
   }
 
   private EventJpaEntity toEntity(Event event) {
     var entity = new EventJpaEntity();
     entity.setId(event.getId());
-    entity.setEventToken(event.getEventToken());
-    entity.setOrganizerToken(event.getOrganizerToken());
+    entity.setEventToken(event.getEventToken().value());
+    entity.setOrganizerToken(event.getOrganizerToken().value());
     entity.setTitle(event.getTitle());
     entity.setDescription(event.getDescription());
     entity.setDateTime(event.getDateTime());
+    entity.setTimezone(event.getTimezone().getId());
     entity.setLocation(event.getLocation());
     entity.setExpiryDate(event.getExpiryDate());
     entity.setCreatedAt(event.getCreatedAt());
@@ -46,11 +49,12 @@ public class EventPersistenceAdapter implements EventRepository {
   private Event toDomain(EventJpaEntity entity) {
     var event = new Event();
     event.setId(entity.getId());
-    event.setEventToken(entity.getEventToken());
-    event.setOrganizerToken(entity.getOrganizerToken());
+    event.setEventToken(new EventToken(entity.getEventToken()));
+    event.setOrganizerToken(new OrganizerToken(entity.getOrganizerToken()));
     event.setTitle(entity.getTitle());
     event.setDescription(entity.getDescription());
     event.setDateTime(entity.getDateTime());
+    event.setTimezone(ZoneId.of(entity.getTimezone()));
     event.setLocation(entity.getLocation());
     event.setExpiryDate(entity.getExpiryDate());
     event.setCreatedAt(entity.getCreatedAt());

backend/src/main/java/de/fete/adapter/out/persistence/RsvpJpaEntity.java

@@ -0,0 +1,68 @@
+package de.fete.adapter.out.persistence;
+
+import jakarta.persistence.Column;
+import jakarta.persistence.Entity;
+import jakarta.persistence.GeneratedValue;
+import jakarta.persistence.GenerationType;
+import jakarta.persistence.Id;
+import jakarta.persistence.Table;
+import java.util.UUID;
+
+/** JPA entity mapping to the rsvps table. */
+@Entity
+@Table(name = "rsvps")
+public class RsvpJpaEntity {
+
+  @Id
+  @GeneratedValue(strategy = GenerationType.IDENTITY)
+  private Long id;
+
+  @Column(name = "rsvp_token", nullable = false, unique = true)
+  private UUID rsvpToken;
+
+  @Column(name = "event_id", nullable = false)
+  private Long eventId;
+
+  @Column(nullable = false, length = 100)
+  private String name;
+
+  /** Returns the internal database ID. */
+  public Long getId() {
+    return id;
+  }
+
+  /** Sets the internal database ID. */
+  public void setId(Long id) {
+    this.id = id;
+  }
+
+  /** Returns the RSVP token. */
+  public UUID getRsvpToken() {
+    return rsvpToken;
+  }
+
+  /** Sets the RSVP token. */
+  public void setRsvpToken(UUID rsvpToken) {
+    this.rsvpToken = rsvpToken;
+  }
+
+  /** Returns the event ID. */
+  public Long getEventId() {
+    return eventId;
+  }
+
+  /** Sets the event ID. */
+  public void setEventId(Long eventId) {
+    this.eventId = eventId;
+  }
+
+  /** Returns the guest's display name. */
+  public String getName() {
+    return name;
+  }
+
+  /** Sets the guest's display name. */
+  public void setName(String name) {
+    this.name = name;
+  }
+}

backend/src/main/java/de/fete/adapter/out/persistence/RsvpJpaRepository.java

@@ -0,0 +1,14 @@
+package de.fete.adapter.out.persistence;
+
+import java.util.UUID;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+/** Spring Data JPA repository for RSVP entities. */
+public interface RsvpJpaRepository extends JpaRepository<RsvpJpaEntity, Long> {
+
+  /** Finds an RSVP by its token. */
+  java.util.Optional<RsvpJpaEntity> findByRsvpToken(UUID rsvpToken);
+
+  /** Counts RSVPs for the given event. */
+  long countByEventId(Long eventId);
+}

backend/src/main/java/de/fete/adapter/out/persistence/RsvpPersistenceAdapter.java

@@ -0,0 +1,48 @@
+package de.fete.adapter.out.persistence;
+
+import de.fete.domain.model.Rsvp;
+import de.fete.domain.model.RsvpToken;
+import de.fete.domain.port.out.RsvpRepository;
+import org.springframework.stereotype.Repository;
+
+/** Persistence adapter implementing the RsvpRepository outbound port. */
+@Repository
+public class RsvpPersistenceAdapter implements RsvpRepository {
+
+  private final RsvpJpaRepository jpaRepository;
+
+  /** Creates a new adapter with the given JPA repository. */
+  public RsvpPersistenceAdapter(RsvpJpaRepository jpaRepository) {
+    this.jpaRepository = jpaRepository;
+  }
+
+  @Override
+  public Rsvp save(Rsvp rsvp) {
+    RsvpJpaEntity entity = toEntity(rsvp);
+    RsvpJpaEntity saved = jpaRepository.save(entity);
+    return toDomain(saved);
+  }
+
+  @Override
+  public long countByEventId(Long eventId) {
+    return jpaRepository.countByEventId(eventId);
+  }
+
+  private RsvpJpaEntity toEntity(Rsvp rsvp) {
+    var entity = new RsvpJpaEntity();
+    entity.setId(rsvp.getId());
+    entity.setRsvpToken(rsvp.getRsvpToken().value());
+    entity.setEventId(rsvp.getEventId());
+    entity.setName(rsvp.getName());
+    return entity;
+  }
+
+  private Rsvp toDomain(RsvpJpaEntity entity) {
+    var rsvp = new Rsvp();
+    rsvp.setId(entity.getId());
+    rsvp.setRsvpToken(new RsvpToken(entity.getRsvpToken()));
+    rsvp.setEventId(entity.getEventId());
+    rsvp.setName(entity.getName());
+    return rsvp;
+  }
+}

backend/src/main/java/de/fete/application/service/EventExpiredException.java

@@ -0,0 +1,12 @@
+package de.fete.application.service;
+
+import java.util.UUID;
+
+/** Thrown when an RSVP is attempted on an expired event. */
+public class EventExpiredException extends RuntimeException {
+
+  /** Creates a new exception for the given event token. */
+  public EventExpiredException(UUID eventToken) {
+    super("Event has expired: " + eventToken);
+  }
+}

backend/src/main/java/de/fete/application/service/EventNotFoundException.java

@@ -0,0 +1,12 @@
+package de.fete.application.service;
+
+import java.util.UUID;
+
+/** Thrown when an event cannot be found by its token. */
+public class EventNotFoundException extends RuntimeException {
+
+  /** Creates a new exception for the given event token. */
+  public EventNotFoundException(UUID eventToken) {
+    super("Event not found: " + eventToken);
+  }
+}

backend/src/main/java/de/fete/application/service/EventService.java

@@ -2,17 +2,20 @@ package de.fete.application.service;
 
 import de.fete.domain.model.CreateEventCommand;
 import de.fete.domain.model.Event;
+import de.fete.domain.model.EventToken;
+import de.fete.domain.model.OrganizerToken;
 import de.fete.domain.port.in.CreateEventUseCase;
+import de.fete.domain.port.in.GetEventUseCase;
 import de.fete.domain.port.out.EventRepository;
 import java.time.Clock;
 import java.time.LocalDate;
 import java.time.OffsetDateTime;
-import java.util.UUID;
+import java.util.Optional;
 import org.springframework.stereotype.Service;
 
-/** Application service implementing event creation. */
+/** Application service implementing event creation and retrieval. */
 @Service
-public class EventService implements CreateEventUseCase {
+public class EventService implements CreateEventUseCase, GetEventUseCase {
 
   private final EventRepository eventRepository;
   private final Clock clock;
@@ -29,16 +32,26 @@ public class EventService implements CreateEventUseCase {
       throw new ExpiryDateInPastException(command.expiryDate());
     }
 
+    if (!command.expiryDate().isAfter(command.dateTime().toLocalDate())) {
+      throw new ExpiryDateBeforeEventException(command.expiryDate(), command.dateTime());
+    }
+
     var event = new Event();
-    event.setEventToken(UUID.randomUUID());
-    event.setOrganizerToken(UUID.randomUUID());
+    event.setEventToken(EventToken.generate());
+    event.setOrganizerToken(OrganizerToken.generate());
     event.setTitle(command.title());
     event.setDescription(command.description());
     event.setDateTime(command.dateTime());
+    event.setTimezone(command.timezone());
     event.setLocation(command.location());
     event.setExpiryDate(command.expiryDate());
     event.setCreatedAt(OffsetDateTime.now(clock));
 
     return eventRepository.save(event);
   }
+
+  @Override
+  public Optional<Event> getByEventToken(EventToken eventToken) {
+    return eventRepository.findByEventToken(eventToken);
+  }
 }

backend/src/main/java/de/fete/application/service/ExpiryDateBeforeEventException.java

@@ -0,0 +1,13 @@
+package de.fete.application.service;
+
+import java.time.LocalDate;
+import java.time.OffsetDateTime;
+
+/** Thrown when an event's expiry date is not after the event date. */
+public class ExpiryDateBeforeEventException extends RuntimeException {
+
+  /** Creates a new exception for the given dates. */
+  public ExpiryDateBeforeEventException(LocalDate expiryDate, OffsetDateTime dateTime) {
+    super("Expiry date " + expiryDate + " must be after event date " + dateTime.toLocalDate());
+  }
+}

backend/src/main/java/de/fete/application/service/InvalidTimezoneException.java

@@ -0,0 +1,10 @@
+package de.fete.application.service;
+
+/** Thrown when an invalid IANA timezone ID is provided. */
+public class InvalidTimezoneException extends RuntimeException {
+
+  /** Creates a new exception for the given invalid timezone. */
+  public InvalidTimezoneException(String timezone) {
+    super("Invalid IANA timezone: " + timezone);
+  }
+}

backend/src/main/java/de/fete/application/service/RsvpService.java

@@ -0,0 +1,56 @@
+package de.fete.application.service;
+
+import de.fete.domain.model.Event;
+import de.fete.domain.model.EventToken;
+import de.fete.domain.model.Rsvp;
+import de.fete.domain.model.RsvpToken;
+import de.fete.domain.port.in.CountAttendeesByEventUseCase;
+import de.fete.domain.port.in.CreateRsvpUseCase;
+import de.fete.domain.port.out.EventRepository;
+import de.fete.domain.port.out.RsvpRepository;
+import java.time.Clock;
+import java.time.LocalDate;
+import org.springframework.stereotype.Service;
+
+/** Application service implementing RSVP creation. */
+@Service
+public class RsvpService implements CreateRsvpUseCase, CountAttendeesByEventUseCase {
+
+  private final EventRepository eventRepository;
+  private final RsvpRepository rsvpRepository;
+  private final Clock clock;
+
+  /** Creates a new RsvpService. */
+  public RsvpService(
+      EventRepository eventRepository,
+      RsvpRepository rsvpRepository,
+      Clock clock) {
+    this.eventRepository = eventRepository;
+    this.rsvpRepository = rsvpRepository;
+    this.clock = clock;
+  }
+
+  @Override
+  public Rsvp createRsvp(EventToken eventToken, String name) {
+    Event event = eventRepository.findByEventToken(eventToken)
+        .orElseThrow(() -> new EventNotFoundException(eventToken.value()));
+
+    if (!event.getExpiryDate().isAfter(LocalDate.now(clock))) {
+      throw new EventExpiredException(eventToken.value());
+    }
+
+    var rsvp = new Rsvp();
+    rsvp.setRsvpToken(RsvpToken.generate());
+    rsvp.setEventId(event.getId());
+    rsvp.setName(name.strip());
+
+    return rsvpRepository.save(rsvp);
+  }
+
+  @Override
+  public long countByEvent(EventToken eventToken) {
+    Event event = eventRepository.findByEventToken(eventToken)
+        .orElseThrow(() -> new EventNotFoundException(eventToken.value()));
+    return rsvpRepository.countByEventId(event.getId());
+  }
+}

backend/src/main/java/de/fete/domain/model/CreateEventCommand.java

@@ -2,12 +2,14 @@ package de.fete.domain.model;
 
 import java.time.LocalDate;
 import java.time.OffsetDateTime;
+import java.time.ZoneId;
 
 /** Command carrying the data needed to create an event. */
 public record CreateEventCommand(
     String title,
     String description,
     OffsetDateTime dateTime,
+    ZoneId timezone,
     String location,
     LocalDate expiryDate
 ) {}

backend/src/main/java/de/fete/domain/model/Event.java

@@ -2,17 +2,18 @@ package de.fete.domain.model;
 
 import java.time.LocalDate;
 import java.time.OffsetDateTime;
-import java.util.UUID;
+import java.time.ZoneId;
 
 /** Domain entity representing an event. */
 public class Event {
 
   private Long id;
-  private UUID eventToken;
-  private UUID organizerToken;
+  private EventToken eventToken;
+  private OrganizerToken organizerToken;
   private String title;
   private String description;
   private OffsetDateTime dateTime;
+  private ZoneId timezone;
   private String location;
   private LocalDate expiryDate;
   private OffsetDateTime createdAt;
@@ -27,23 +28,23 @@ public class Event {
     this.id = id;
   }
 
-  /** Returns the public event token (UUID). */
-  public UUID getEventToken() {
+  /** Returns the public event token. */
+  public EventToken getEventToken() {
     return eventToken;
   }
 
   /** Sets the public event token. */
-  public void setEventToken(UUID eventToken) {
+  public void setEventToken(EventToken eventToken) {
     this.eventToken = eventToken;
   }
 
-  /** Returns the secret organizer token (UUID). */
-  public UUID getOrganizerToken() {
+  /** Returns the secret organizer token. */
+  public OrganizerToken getOrganizerToken() {
     return organizerToken;
   }
 
   /** Sets the secret organizer token. */
-  public void setOrganizerToken(UUID organizerToken) {
+  public void setOrganizerToken(OrganizerToken organizerToken) {
     this.organizerToken = organizerToken;
   }
 
@@ -77,6 +78,16 @@ public class Event {
     this.dateTime = dateTime;
   }
 
+  /** Returns the IANA timezone. */
+  public ZoneId getTimezone() {
+    return timezone;
+  }
+
+  /** Sets the IANA timezone. */
+  public void setTimezone(ZoneId timezone) {
+    this.timezone = timezone;
+  }
+
   /** Returns the event location. */
   public String getLocation() {
     return location;

backend/src/main/java/de/fete/domain/model/EventToken.java

@@ -0,0 +1,18 @@
+package de.fete.domain.model;
+
+import java.util.Objects;
+import java.util.UUID;
+
+/** Type-safe wrapper for the public event token. */
+public record EventToken(UUID value) {
+
+  /** Validates that the token value is not null. */
+  public EventToken {
+    Objects.requireNonNull(value, "eventToken must not be null");
+  }
+
+  /** Generates a new random event token. */
+  public static EventToken generate() {
+    return new EventToken(UUID.randomUUID());
+  }
+}

backend/src/main/java/de/fete/domain/model/OrganizerToken.java

@@ -0,0 +1,18 @@
+package de.fete.domain.model;
+
+import java.util.Objects;
+import java.util.UUID;
+
+/** Type-safe wrapper for the secret organizer token. */
+public record OrganizerToken(UUID value) {
+
+  /** Validates that the token value is not null. */
+  public OrganizerToken {
+    Objects.requireNonNull(value, "organizerToken must not be null");
+  }
+
+  /** Generates a new random organizer token. */
+  public static OrganizerToken generate() {
+    return new OrganizerToken(UUID.randomUUID());
+  }
+}

backend/src/main/java/de/fete/domain/model/Rsvp.java

@@ -0,0 +1,50 @@
+package de.fete.domain.model;
+
+/** Domain entity representing an RSVP. */
+public class Rsvp {
+
+  private Long id;
+  private RsvpToken rsvpToken;
+  private Long eventId;
+  private String name;
+
+  /** Returns the internal database ID. */
+  public Long getId() {
+    return id;
+  }
+
+  /** Sets the internal database ID. */
+  public void setId(Long id) {
+    this.id = id;
+  }
+
+  /** Returns the RSVP token. */
+  public RsvpToken getRsvpToken() {
+    return rsvpToken;
+  }
+
+  /** Sets the RSVP token. */
+  public void setRsvpToken(RsvpToken rsvpToken) {
+    this.rsvpToken = rsvpToken;
+  }
+
+  /** Returns the event ID this RSVP belongs to. */
+  public Long getEventId() {
+    return eventId;
+  }
+
+  /** Sets the event ID. */
+  public void setEventId(Long eventId) {
+    this.eventId = eventId;
+  }
+
+  /** Returns the guest's display name. */
+  public String getName() {
+    return name;
+  }
+
+  /** Sets the guest's display name. */
+  public void setName(String name) {
+    this.name = name;
+  }
+}

backend/src/main/java/de/fete/domain/model/RsvpToken.java

@@ -0,0 +1,18 @@
+package de.fete.domain.model;
+
+import java.util.Objects;
+import java.util.UUID;
+
+/** Type-safe wrapper for the RSVP token. */
+public record RsvpToken(UUID value) {
+
+  /** Validates that the token value is not null. */
+  public RsvpToken {
+    Objects.requireNonNull(value, "rsvpToken must not be null");
+  }
+
+  /** Generates a new random RSVP token. */
+  public static RsvpToken generate() {
+    return new RsvpToken(UUID.randomUUID());
+  }
+}

backend/src/main/java/de/fete/domain/port/in/CountAttendeesByEventUseCase.java

@@ -0,0 +1,10 @@
+package de.fete.domain.port.in;
+
+import de.fete.domain.model.EventToken;
+
+/** Inbound port for counting attendees of an event. */
+public interface CountAttendeesByEventUseCase {
+
+  /** Counts the number of confirmed attendees for the given event. */
+  long countByEvent(EventToken eventToken);
+}

backend/src/main/java/de/fete/domain/port/in/CreateRsvpUseCase.java

@@ -0,0 +1,11 @@
+package de.fete.domain.port.in;
+
+import de.fete.domain.model.EventToken;
+import de.fete.domain.model.Rsvp;
+
+/** Inbound port for creating a new RSVP. */
+public interface CreateRsvpUseCase {
+
+  /** Creates an RSVP for the given event and guest name. */
+  Rsvp createRsvp(EventToken eventToken, String name);
+}

backend/src/main/java/de/fete/domain/port/in/GetEventUseCase.java

@@ -0,0 +1,12 @@
+package de.fete.domain.port.in;
+
+import de.fete.domain.model.Event;
+import de.fete.domain.model.EventToken;
+import java.util.Optional;
+
+/** Inbound port for retrieving a public event by its token. */
+public interface GetEventUseCase {
+
+  /** Finds an event by its public event token. */
+  Optional<Event> getByEventToken(EventToken eventToken);
+}

backend/src/main/java/de/fete/domain/port/out/EventRepository.java

@@ -1,8 +1,8 @@
 package de.fete.domain.port.out;
 
 import de.fete.domain.model.Event;
+import de.fete.domain.model.EventToken;
 import java.util.Optional;
-import java.util.UUID;
 
 /** Outbound port for persisting and retrieving events. */
 public interface EventRepository {
@@ -11,5 +11,5 @@ public interface EventRepository {
   Event save(Event event);
 
   /** Finds an event by its public event token. */
-  Optional<Event> findByEventToken(UUID eventToken);
+  Optional<Event> findByEventToken(EventToken eventToken);
 }

backend/src/main/java/de/fete/domain/port/out/RsvpRepository.java

@@ -0,0 +1,13 @@
+package de.fete.domain.port.out;
+
+import de.fete.domain.model.Rsvp;
+
+/** Outbound port for persisting and querying RSVPs. */
+public interface RsvpRepository {
+
+  /** Persists the given RSVP and returns it with generated fields populated. */
+  Rsvp save(Rsvp rsvp);
+
+  /** Counts the number of RSVPs for the given event. */
+  long countByEventId(Long eventId);
+}

backend/src/main/resources/db/changelog/002-add-timezone-column.xml

@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<databaseChangeLog
+    xmlns="http://www.liquibase.org/xml/ns/dbchangelog"
+    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xsi:schemaLocation="http://www.liquibase.org/xml/ns/dbchangelog
+        http://www.liquibase.org/xml/ns/dbchangelog/dbchangelog-latest.xsd">
+
+    <changeSet id="002-add-timezone-column" author="fete">
+        <addColumn tableName="events">
+            <column name="timezone" type="varchar(64)" defaultValue="UTC">
+                <constraints nullable="false"/>
+            </column>
+        </addColumn>
+    </changeSet>
+
+</databaseChangeLog>

backend/src/main/resources/db/changelog/003-create-rsvps-table.xml

@@ -0,0 +1,36 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<databaseChangeLog
+    xmlns="http://www.liquibase.org/xml/ns/dbchangelog"
+    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xsi:schemaLocation="http://www.liquibase.org/xml/ns/dbchangelog
+        http://www.liquibase.org/xml/ns/dbchangelog/dbchangelog-latest.xsd">
+
+    <changeSet id="003-create-rsvps-table" author="fete">
+        <createTable tableName="rsvps">
+            <column name="id" type="bigserial" autoIncrement="true">
+                <constraints primaryKey="true" nullable="false"/>
+            </column>
+            <column name="rsvp_token" type="uuid">
+                <constraints nullable="false" unique="true"/>
+            </column>
+            <column name="event_id" type="bigint">
+                <constraints nullable="false"
+                             foreignKeyName="fk_rsvps_event_id"
+                             references="events(id)"
+                             deleteCascade="true"/>
+            </column>
+            <column name="name" type="varchar(100)">
+                <constraints nullable="false"/>
+            </column>
+        </createTable>
+
+        <createIndex tableName="rsvps" indexName="idx_rsvps_event_id">
+            <column name="event_id"/>
+        </createIndex>
+
+        <createIndex tableName="rsvps" indexName="idx_rsvps_rsvp_token">
+            <column name="rsvp_token"/>
+        </createIndex>
+    </changeSet>
+
+</databaseChangeLog>

backend/src/main/resources/db/changelog/db.changelog-master.xml

@@ -7,5 +7,7 @@
 
     <include file="db/changelog/000-baseline.xml"/>
     <include file="db/changelog/001-create-events-table.xml"/>
+    <include file="db/changelog/002-add-timezone-column.xml"/>
+    <include file="db/changelog/003-create-rsvps-table.xml"/>
 
 </databaseChangeLog>

backend/src/main/resources/openapi/api.yaml

@@ -37,6 +37,80 @@ paths:
               schema:
                 $ref: "#/components/schemas/ValidationProblemDetail"
 
+  /events/{token}/rsvps:
+    post:
+      operationId: createRsvp
+      summary: Submit an RSVP for an event
+      tags:
+        - events
+      parameters:
+        - name: token
+          in: path
+          required: true
+          schema:
+            type: string
+            format: uuid
+          description: Public event token
+      requestBody:
+        required: true
+        content:
+          application/json:
+            schema:
+              $ref: "#/components/schemas/CreateRsvpRequest"
+      responses:
+        "201":
+          description: RSVP created successfully
+          content:
+            application/json:
+              schema:
+                $ref: "#/components/schemas/CreateRsvpResponse"
+        "400":
+          description: Validation failed (e.g. blank name)
+          content:
+            application/problem+json:
+              schema:
+                $ref: "#/components/schemas/ValidationProblemDetail"
+        "404":
+          description: Event not found
+          content:
+            application/problem+json:
+              schema:
+                $ref: "#/components/schemas/ProblemDetail"
+        "409":
+          description: Event has expired — RSVPs no longer accepted
+          content:
+            application/problem+json:
+              schema:
+                $ref: "#/components/schemas/ProblemDetail"
+
+  /events/{token}:
+    get:
+      operationId: getEvent
+      summary: Get public event details by token
+      tags:
+        - events
+      parameters:
+        - name: token
+          in: path
+          required: true
+          schema:
+            type: string
+            format: uuid
+          description: Public event token
+      responses:
+        "200":
+          description: Event found
+          content:
+            application/json:
+              schema:
+                $ref: "#/components/schemas/GetEventResponse"
+        "404":
+          description: Event not found
+          content:
+            application/problem+json:
+              schema:
+                $ref: "#/components/schemas/ProblemDetail"
+
 components:
   schemas:
     CreateEventRequest:
@@ -44,6 +118,7 @@ components:
       required:
         - title
         - dateTime
+        - timezone
         - expiryDate
       properties:
         title:
@@ -58,6 +133,10 @@ components:
           format: date-time
           description: Event date and time with UTC offset (ISO 8601)
           example: "2026-03-15T20:00:00+01:00"
+        timezone:
+          type: string
+          description: IANA timezone of the organizer
+          example: "Europe/Berlin"
         location:
           type: string
           maxLength: 500
@@ -74,6 +153,7 @@ components:
         - organizerToken
         - title
         - dateTime
+        - timezone
         - expiryDate
       properties:
         eventToken:
@@ -93,11 +173,89 @@ components:
           type: string
           format: date-time
           example: "2026-03-15T20:00:00+01:00"
+        timezone:
+          type: string
+          description: IANA timezone of the organizer
+          example: "Europe/Berlin"
         expiryDate:
           type: string
           format: date
           example: "2026-06-15"
 
+    GetEventResponse:
+      type: object
+      required:
+        - eventToken
+        - title
+        - dateTime
+        - timezone
+        - attendeeCount
+        - expired
+      properties:
+        eventToken:
+          type: string
+          format: uuid
+          description: Public event token
+          example: "a1b2c3d4-e5f6-7890-abcd-ef1234567890"
+        title:
+          type: string
+          description: Event title
+          example: "Summer BBQ"
+        description:
+          type: string
+          description: Event description (absent if not set)
+          example: "Bring your own drinks!"
+        dateTime:
+          type: string
+          format: date-time
+          description: Event date/time with organizer's UTC offset
+          example: "2026-03-15T20:00:00+01:00"
+        timezone:
+          type: string
+          description: IANA timezone name of the organizer
+          example: "Europe/Berlin"
+        location:
+          type: string
+          description: Event location (absent if not set)
+          example: "Central Park, NYC"
+        attendeeCount:
+          type: integer
+          minimum: 0
+          description: Number of confirmed attendees (attending=true)
+          example: 12
+        expired:
+          type: boolean
+          description: Whether the event's expiry date has passed
+          example: false
+
+    CreateRsvpRequest:
+      type: object
+      required:
+        - name
+      properties:
+        name:
+          type: string
+          minLength: 1
+          maxLength: 100
+          description: Guest's display name
+          example: "Max Mustermann"
+
+    CreateRsvpResponse:
+      type: object
+      required:
+        - rsvpToken
+        - name
+      properties:
+        rsvpToken:
+          type: string
+          format: uuid
+          description: Token identifying this RSVP (store client-side for future updates)
+          example: "d4e5f6a7-b8c9-0123-4567-890abcdef012"
+        name:
+          type: string
+          description: Guest's display name as stored
+          example: "Max Mustermann"
+
     ProblemDetail:
       type: object
       properties:

backend/src/test/java/de/fete/HexagonalArchitectureTest.java

@@ -60,4 +60,9 @@ class HexagonalArchitectureTest {
   static final ArchRule persistenceMustNotDependOnWeb = noClasses()
       .that().resideInAPackage("de.fete.adapter.out.persistence..")
       .should().dependOnClassesThat().resideInAPackage("de.fete.adapter.in.web..");
+
+  @ArchTest
+  static final ArchRule webAdapterMustNotDependOnOutboundPorts = noClasses()
+      .that().resideInAPackage("de.fete.adapter.in.web..")
+      .should().dependOnClassesThat().resideInAPackage("de.fete.domain.port.out..");
 }

backend/src/test/java/de/fete/adapter/in/web/EventControllerIntegrationTest.java

@@ -1,12 +1,26 @@
 package de.fete.adapter.in.web;
 
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.get;
 import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.post;
 import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.content;
 import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.jsonPath;
 import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;
 
+import com.fasterxml.jackson.databind.ObjectMapper;
 import de.fete.TestcontainersConfig;
+import de.fete.adapter.in.web.model.CreateEventRequest;
+import de.fete.adapter.in.web.model.CreateEventResponse;
+import de.fete.adapter.in.web.model.CreateRsvpRequest;
+import de.fete.adapter.in.web.model.CreateRsvpResponse;
+import de.fete.adapter.out.persistence.EventJpaEntity;
+import de.fete.adapter.out.persistence.EventJpaRepository;
+import de.fete.adapter.out.persistence.RsvpJpaEntity;
+import de.fete.adapter.out.persistence.RsvpJpaRepository;
 import java.time.LocalDate;
+import java.time.OffsetDateTime;
+import java.time.ZoneOffset;
+import java.util.UUID;
 import org.junit.jupiter.api.Test;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.test.autoconfigure.web.servlet.AutoConfigureMockMvc;
@@ -23,158 +37,421 @@ class EventControllerIntegrationTest {
   @Autowired
   private MockMvc mockMvc;
 
+  @Autowired
+  private ObjectMapper objectMapper;
+
+  @Autowired
+  private EventJpaRepository jpaRepository;
+
+  @Autowired
+  private RsvpJpaRepository rsvpJpaRepository;
+
+  // --- Create Event tests ---
+
   @Test
   void createEventWithValidBody() throws Exception {
-    String body =
-        """
-        {
-          "title": "Birthday Party",
-          "description": "Come celebrate!",
-          "dateTime": "2026-06-15T20:00:00+02:00",
-          "location": "Berlin",
-          "expiryDate": "%s"
-        }
-        """.formatted(LocalDate.now().plusDays(30));
+    var request = new CreateEventRequest()
+        .title("Birthday Party")
+        .description("Come celebrate!")
+        .dateTime(OffsetDateTime.of(2026, 6, 15, 20, 0, 0, 0, ZoneOffset.ofHours(2)))
+        .timezone("Europe/Berlin")
+        .location("Berlin")
+        .expiryDate(LocalDate.of(2026, 6, 16));
 
-    mockMvc.perform(post("/api/events")
+    var result = mockMvc.perform(post("/api/events")
             .contentType(MediaType.APPLICATION_JSON)
-            .content(body))
+            .content(objectMapper.writeValueAsString(request)))
         .andExpect(status().isCreated())
         .andExpect(jsonPath("$.eventToken").isNotEmpty())
         .andExpect(jsonPath("$.organizerToken").isNotEmpty())
         .andExpect(jsonPath("$.title").value("Birthday Party"))
+        .andExpect(jsonPath("$.timezone").value("Europe/Berlin"))
         .andExpect(jsonPath("$.dateTime").isNotEmpty())
-        .andExpect(jsonPath("$.expiryDate").isNotEmpty());
+        .andExpect(jsonPath("$.expiryDate").isNotEmpty())
+        .andReturn();
+
+    var response = objectMapper.readValue(
+        result.getResponse().getContentAsString(), CreateEventResponse.class);
+
+    EventJpaEntity persisted = jpaRepository
+        .findByEventToken(response.getEventToken()).orElseThrow();
+    assertThat(persisted.getTitle()).isEqualTo("Birthday Party");
+    assertThat(persisted.getDescription()).isEqualTo("Come celebrate!");
+    assertThat(persisted.getTimezone()).isEqualTo("Europe/Berlin");
+    assertThat(persisted.getLocation()).isEqualTo("Berlin");
+    assertThat(persisted.getExpiryDate()).isEqualTo(request.getExpiryDate());
+    assertThat(persisted.getDateTime().toInstant())
+        .isEqualTo(request.getDateTime().toInstant());
+    assertThat(persisted.getOrganizerToken()).isNotNull();
+    assertThat(persisted.getCreatedAt()).isNotNull();
   }
 
   @Test
   void createEventWithOptionalFieldsNull() throws Exception {
-    String body =
-        """
-        {
-          "title": "Minimal Event",
-          "dateTime": "2026-06-15T20:00:00+02:00",
-          "expiryDate": "%s"
-        }
-        """.formatted(LocalDate.now().plusDays(30));
+    var request = new CreateEventRequest()
+        .title("Minimal Event")
+        .dateTime(OffsetDateTime.of(2026, 6, 15, 20, 0, 0, 0, ZoneOffset.ofHours(2)))
+        .timezone("UTC")
+        .expiryDate(LocalDate.of(2026, 6, 16));
 
-    mockMvc.perform(post("/api/events")
+    var result = mockMvc.perform(post("/api/events")
             .contentType(MediaType.APPLICATION_JSON)
-            .content(body))
+            .content(objectMapper.writeValueAsString(request)))
         .andExpect(status().isCreated())
         .andExpect(jsonPath("$.eventToken").isNotEmpty())
         .andExpect(jsonPath("$.organizerToken").isNotEmpty())
-        .andExpect(jsonPath("$.title").value("Minimal Event"));
+        .andExpect(jsonPath("$.title").value("Minimal Event"))
+        .andReturn();
+
+    var response = objectMapper.readValue(
+        result.getResponse().getContentAsString(), CreateEventResponse.class);
+
+    EventJpaEntity persisted = jpaRepository
+        .findByEventToken(response.getEventToken()).orElseThrow();
+    assertThat(persisted.getTitle()).isEqualTo("Minimal Event");
+    assertThat(persisted.getDescription()).isNull();
+    assertThat(persisted.getLocation()).isNull();
   }
 
   @Test
   void createEventMissingTitleReturns400() throws Exception {
-    String body =
-        """
-        {
-          "dateTime": "2026-06-15T20:00:00+02:00",
-          "expiryDate": "%s"
-        }
-        """.formatted(LocalDate.now().plusDays(30));
+    long countBefore = jpaRepository.count();
+
+    var request = new CreateEventRequest()
+        .dateTime(OffsetDateTime.of(2026, 6, 15, 20, 0, 0, 0, ZoneOffset.ofHours(2)))
+        .timezone("Europe/Berlin")
+        .expiryDate(LocalDate.of(2026, 6, 16));
 
     mockMvc.perform(post("/api/events")
             .contentType(MediaType.APPLICATION_JSON)
-            .content(body))
+            .content(objectMapper.writeValueAsString(request)))
         .andExpect(status().isBadRequest())
         .andExpect(content().contentTypeCompatibleWith("application/problem+json"))
         .andExpect(jsonPath("$.title").value("Validation Failed"))
         .andExpect(jsonPath("$.fieldErrors").isArray());
+
+    assertThat(jpaRepository.count()).isEqualTo(countBefore);
   }
 
   @Test
   void createEventMissingDateTimeReturns400() throws Exception {
-    String body =
-        """
-        {
-          "title": "No Date",
-          "expiryDate": "%s"
-        }
-        """.formatted(LocalDate.now().plusDays(30));
+    long countBefore = jpaRepository.count();
+
+    var request = new CreateEventRequest()
+        .title("No Date")
+        .timezone("Europe/Berlin")
+        .expiryDate(LocalDate.of(2026, 6, 16));
 
     mockMvc.perform(post("/api/events")
             .contentType(MediaType.APPLICATION_JSON)
-            .content(body))
+            .content(objectMapper.writeValueAsString(request)))
         .andExpect(status().isBadRequest())
         .andExpect(content().contentTypeCompatibleWith("application/problem+json"))
         .andExpect(jsonPath("$.fieldErrors").isArray());
+
+    assertThat(jpaRepository.count()).isEqualTo(countBefore);
   }
 
   @Test
   void createEventMissingExpiryDateReturns400() throws Exception {
-    String body =
-        """
-        {
-          "title": "No Expiry",
-          "dateTime": "2026-06-15T20:00:00+02:00"
-        }
-        """;
+    long countBefore = jpaRepository.count();
+
+    var request = new CreateEventRequest()
+        .title("No Expiry")
+        .dateTime(OffsetDateTime.of(2026, 6, 15, 20, 0, 0, 0, ZoneOffset.ofHours(2)))
+        .timezone("Europe/Berlin");
 
     mockMvc.perform(post("/api/events")
             .contentType(MediaType.APPLICATION_JSON)
-            .content(body))
+            .content(objectMapper.writeValueAsString(request)))
         .andExpect(status().isBadRequest())
         .andExpect(content().contentTypeCompatibleWith("application/problem+json"))
         .andExpect(jsonPath("$.fieldErrors").isArray());
+
+    assertThat(jpaRepository.count()).isEqualTo(countBefore);
   }
 
   @Test
   void createEventExpiryDateInPastReturns400() throws Exception {
-    String body =
-        """
-        {
-          "title": "Past Expiry",
-          "dateTime": "2026-06-15T20:00:00+02:00",
-          "expiryDate": "2025-01-01"
-        }
-        """;
+    long countBefore = jpaRepository.count();
+
+    var request = new CreateEventRequest()
+        .title("Past Expiry")
+        .dateTime(OffsetDateTime.of(2026, 6, 15, 20, 0, 0, 0, ZoneOffset.ofHours(2)))
+        .timezone("Europe/Berlin")
+        .expiryDate(LocalDate.of(2025, 1, 1));
 
     mockMvc.perform(post("/api/events")
             .contentType(MediaType.APPLICATION_JSON)
-            .content(body))
+            .content(objectMapper.writeValueAsString(request)))
         .andExpect(status().isBadRequest())
         .andExpect(content().contentTypeCompatibleWith("application/problem+json"))
         .andExpect(jsonPath("$.type").value("urn:problem-type:expiry-date-in-past"));
+
+    assertThat(jpaRepository.count()).isEqualTo(countBefore);
   }
 
   @Test
   void createEventExpiryDateTodayReturns400() throws Exception {
-    String body =
-        """
-        {
-          "title": "Today Expiry",
-          "dateTime": "2026-06-15T20:00:00+02:00",
-          "expiryDate": "%s"
-        }
-        """.formatted(LocalDate.now());
+    long countBefore = jpaRepository.count();
+
+    var request = new CreateEventRequest()
+        .title("Today Expiry")
+        .dateTime(OffsetDateTime.of(2026, 6, 15, 20, 0, 0, 0, ZoneOffset.ofHours(2)))
+        .timezone("Europe/Berlin")
+        .expiryDate(LocalDate.now());
 
     mockMvc.perform(post("/api/events")
             .contentType(MediaType.APPLICATION_JSON)
-            .content(body))
+            .content(objectMapper.writeValueAsString(request)))
         .andExpect(status().isBadRequest())
         .andExpect(content().contentTypeCompatibleWith("application/problem+json"))
         .andExpect(jsonPath("$.type").value("urn:problem-type:expiry-date-in-past"));
+
+    assertThat(jpaRepository.count()).isEqualTo(countBefore);
+  }
+
+  @Test
+  void createEventExpiryDateBeforeEventDateReturns400() throws Exception {
+    long countBefore = jpaRepository.count();
+
+    var request = new CreateEventRequest()
+        .title("Bad Expiry")
+        .dateTime(OffsetDateTime.of(2026, 6, 15, 20, 0, 0, 0, ZoneOffset.ofHours(2)))
+        .timezone("Europe/Berlin")
+        .expiryDate(LocalDate.of(2026, 6, 10));
+
+    mockMvc.perform(post("/api/events")
+            .contentType(MediaType.APPLICATION_JSON)
+            .content(objectMapper.writeValueAsString(request)))
+        .andExpect(status().isBadRequest())
+        .andExpect(content().contentTypeCompatibleWith("application/problem+json"))
+        .andExpect(jsonPath("$.type").value("urn:problem-type:expiry-date-before-event"));
+
+    assertThat(jpaRepository.count()).isEqualTo(countBefore);
+  }
+
+  @Test
+  void createEventExpiryDateSameAsEventDateReturns400() throws Exception {
+    long countBefore = jpaRepository.count();
+
+    var request = new CreateEventRequest()
+        .title("Same Day Expiry")
+        .dateTime(OffsetDateTime.of(2026, 6, 15, 20, 0, 0, 0, ZoneOffset.ofHours(2)))
+        .timezone("Europe/Berlin")
+        .expiryDate(LocalDate.of(2026, 6, 15));
+
+    mockMvc.perform(post("/api/events")
+            .contentType(MediaType.APPLICATION_JSON)
+            .content(objectMapper.writeValueAsString(request)))
+        .andExpect(status().isBadRequest())
+        .andExpect(content().contentTypeCompatibleWith("application/problem+json"))
+        .andExpect(jsonPath("$.type").value("urn:problem-type:expiry-date-before-event"));
+
+    assertThat(jpaRepository.count()).isEqualTo(countBefore);
   }
 
   @Test
   void errorResponseContentTypeIsProblemJson() throws Exception {
-    String body =
-        """
-        {
-          "title": "",
-          "dateTime": "2026-06-15T20:00:00+02:00",
-          "expiryDate": "%s"
-        }
-        """.formatted(LocalDate.now().plusDays(30));
+    var request = new CreateEventRequest()
+        .title("")
+        .dateTime(OffsetDateTime.of(2026, 6, 15, 20, 0, 0, 0, ZoneOffset.ofHours(2)))
+        .timezone("Europe/Berlin")
+        .expiryDate(LocalDate.of(2026, 6, 16));
 
     mockMvc.perform(post("/api/events")
             .contentType(MediaType.APPLICATION_JSON)
-            .content(body))
+            .content(objectMapper.writeValueAsString(request)))
         .andExpect(status().isBadRequest())
         .andExpect(content().contentTypeCompatibleWith("application/problem+json"));
   }
+
+  @Test
+  void createEventWithInvalidTimezoneReturns400() throws Exception {
+    long countBefore = jpaRepository.count();
+
+    var request = new CreateEventRequest()
+        .title("Bad TZ")
+        .dateTime(OffsetDateTime.of(2026, 6, 15, 20, 0, 0, 0, ZoneOffset.ofHours(2)))
+        .timezone("Not/A/Zone")
+        .expiryDate(LocalDate.of(2026, 6, 16));
+
+    mockMvc.perform(post("/api/events")
+            .contentType(MediaType.APPLICATION_JSON)
+            .content(objectMapper.writeValueAsString(request)))
+        .andExpect(status().isBadRequest())
+        .andExpect(content().contentTypeCompatibleWith("application/problem+json"))
+        .andExpect(jsonPath("$.type").value("urn:problem-type:invalid-timezone"));
+
+    assertThat(jpaRepository.count()).isEqualTo(countBefore);
+  }
+
+  // --- GET /events/{token} tests ---
+
+  @Test
+  void getEventReturnsFullResponse() throws Exception {
+    EventJpaEntity entity = seedEvent(
+        "Summer BBQ", "Bring drinks!", "Europe/Berlin",
+        "Central Park", LocalDate.now().plusDays(30));
+
+    mockMvc.perform(get("/api/events/" + entity.getEventToken()))
+        .andExpect(status().isOk())
+        .andExpect(jsonPath("$.eventToken").value(entity.getEventToken().toString()))
+        .andExpect(jsonPath("$.title").value("Summer BBQ"))
+        .andExpect(jsonPath("$.description").value("Bring drinks!"))
+        .andExpect(jsonPath("$.timezone").value("Europe/Berlin"))
+        .andExpect(jsonPath("$.location").value("Central Park"))
+        .andExpect(jsonPath("$.attendeeCount").value(0))
+        .andExpect(jsonPath("$.expired").value(false))
+        .andExpect(jsonPath("$.dateTime").isNotEmpty());
+  }
+
+  @Test
+  void getEventWithOptionalFieldsAbsent() throws Exception {
+    EventJpaEntity entity = seedEvent(
+        "Minimal", null, "UTC", null, LocalDate.now().plusDays(30));
+
+    mockMvc.perform(get("/api/events/" + entity.getEventToken()))
+        .andExpect(status().isOk())
+        .andExpect(jsonPath("$.title").value("Minimal"))
+        .andExpect(jsonPath("$.description").doesNotExist())
+        .andExpect(jsonPath("$.location").doesNotExist())
+        .andExpect(jsonPath("$.attendeeCount").value(0));
+  }
+
+  @Test
+  void getEventNotFoundReturns404() throws Exception {
+    mockMvc.perform(get("/api/events/" + UUID.randomUUID()))
+        .andExpect(status().isNotFound())
+        .andExpect(content().contentTypeCompatibleWith("application/problem+json"))
+        .andExpect(jsonPath("$.type").value("urn:problem-type:event-not-found"));
+  }
+
+  @Test
+  void getExpiredEventReturnsExpiredTrue() throws Exception {
+    EventJpaEntity entity = seedEvent(
+        "Past Event", "It happened", "Europe/Berlin",
+        "Old Venue", LocalDate.now().minusDays(1));
+
+    mockMvc.perform(get("/api/events/" + entity.getEventToken()))
+        .andExpect(status().isOk())
+        .andExpect(jsonPath("$.title").value("Past Event"))
+        .andExpect(jsonPath("$.expired").value(true));
+  }
+
+  // --- RSVP tests ---
+
+  @Test
+  void createRsvpReturns201WithToken() throws Exception {
+    EventJpaEntity event = seedEvent(
+        "RSVP Event", "Join us!", "Europe/Berlin",
+        "Berlin", LocalDate.now().plusDays(30));
+
+    var request = new CreateRsvpRequest().name("Max Mustermann");
+
+    var result = mockMvc.perform(post("/api/events/" + event.getEventToken() + "/rsvps")
+            .contentType(MediaType.APPLICATION_JSON)
+            .content(objectMapper.writeValueAsString(request)))
+        .andExpect(status().isCreated())
+        .andExpect(jsonPath("$.rsvpToken").isNotEmpty())
+        .andExpect(jsonPath("$.name").value("Max Mustermann"))
+        .andReturn();
+
+    var response = objectMapper.readValue(
+        result.getResponse().getContentAsString(), CreateRsvpResponse.class);
+
+    RsvpJpaEntity persisted = rsvpJpaRepository
+        .findByRsvpToken(response.getRsvpToken()).orElseThrow();
+    assertThat(persisted.getName()).isEqualTo("Max Mustermann");
+    assertThat(persisted.getEventId()).isEqualTo(event.getId());
+  }
+
+  @Test
+  void createRsvpWithBlankNameReturns400() throws Exception {
+    EventJpaEntity event = seedEvent(
+        "RSVP Event", null, "Europe/Berlin",
+        null, LocalDate.now().plusDays(30));
+    long countBefore = rsvpJpaRepository.count();
+
+    var request = new CreateRsvpRequest().name("");
+
+    mockMvc.perform(post("/api/events/" + event.getEventToken() + "/rsvps")
+            .contentType(MediaType.APPLICATION_JSON)
+            .content(objectMapper.writeValueAsString(request)))
+        .andExpect(status().isBadRequest())
+        .andExpect(content().contentTypeCompatibleWith("application/problem+json"));
+
+    assertThat(rsvpJpaRepository.count()).isEqualTo(countBefore);
+  }
+
+  @Test
+  void attendeeCountIncreasesAfterRsvp() throws Exception {
+    EventJpaEntity event = seedEvent(
+        "Count Event", null, "Europe/Berlin",
+        null, LocalDate.now().plusDays(30));
+
+    mockMvc.perform(get("/api/events/" + event.getEventToken()))
+        .andExpect(jsonPath("$.attendeeCount").value(0));
+
+    var request = new CreateRsvpRequest().name("First Guest");
+
+    mockMvc.perform(post("/api/events/" + event.getEventToken() + "/rsvps")
+            .contentType(MediaType.APPLICATION_JSON)
+            .content(objectMapper.writeValueAsString(request)))
+        .andExpect(status().isCreated());
+
+    mockMvc.perform(get("/api/events/" + event.getEventToken()))
+        .andExpect(jsonPath("$.attendeeCount").value(1));
+  }
+
+  @Test
+  void createRsvpForUnknownEventReturns404() throws Exception {
+    long countBefore = rsvpJpaRepository.count();
+
+    var request = new CreateRsvpRequest().name("Ghost");
+
+    mockMvc.perform(post("/api/events/" + UUID.randomUUID() + "/rsvps")
+            .contentType(MediaType.APPLICATION_JSON)
+            .content(objectMapper.writeValueAsString(request)))
+        .andExpect(status().isNotFound())
+        .andExpect(content().contentTypeCompatibleWith("application/problem+json"))
+        .andExpect(jsonPath("$.type").value("urn:problem-type:event-not-found"));
+
+    assertThat(rsvpJpaRepository.count()).isEqualTo(countBefore);
+  }
+
+  @Test
+  void createRsvpForExpiredEventReturns409() throws Exception {
+    EventJpaEntity event = seedEvent(
+        "Expired Party", null, "Europe/Berlin",
+        null, LocalDate.now().minusDays(1));
+    long countBefore = rsvpJpaRepository.count();
+
+    var request = new CreateRsvpRequest().name("Late Guest");
+
+    mockMvc.perform(post("/api/events/" + event.getEventToken() + "/rsvps")
+            .contentType(MediaType.APPLICATION_JSON)
+            .content(objectMapper.writeValueAsString(request)))
+        .andExpect(status().isConflict())
+        .andExpect(content().contentTypeCompatibleWith("application/problem+json"))
+        .andExpect(jsonPath("$.type").value("urn:problem-type:event-expired"));
+
+    assertThat(rsvpJpaRepository.count()).isEqualTo(countBefore);
+  }
+
+  private EventJpaEntity seedEvent(
+      String title, String description, String timezone,
+      String location, LocalDate expiryDate) {
+    var entity = new EventJpaEntity();
+    entity.setEventToken(UUID.randomUUID());
+    entity.setOrganizerToken(UUID.randomUUID());
+    entity.setTitle(title);
+    entity.setDescription(description);
+    entity.setDateTime(OffsetDateTime.of(2026, 6, 15, 20, 0, 0, 0, ZoneOffset.ofHours(2)));
+    entity.setTimezone(timezone);
+    entity.setLocation(location);
+    entity.setExpiryDate(expiryDate);
+    entity.setCreatedAt(OffsetDateTime.now());
+    return jpaRepository.save(entity);
+  }
 }

backend/src/test/java/de/fete/adapter/out/persistence/EventPersistenceAdapterTest.java

@@ -4,12 +4,14 @@ import static org.assertj.core.api.Assertions.assertThat;
 
 import de.fete.TestcontainersConfig;
 import de.fete.domain.model.Event;
+import de.fete.domain.model.EventToken;
+import de.fete.domain.model.OrganizerToken;
 import de.fete.domain.port.out.EventRepository;
 import java.time.LocalDate;
 import java.time.OffsetDateTime;
+import java.time.ZoneId;
 import java.time.ZoneOffset;
 import java.util.Optional;
-import java.util.UUID;
 import org.junit.jupiter.api.Test;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.test.context.SpringBootTest;
@@ -46,7 +48,7 @@ class EventPersistenceAdapterTest {
 
   @Test
   void findByUnknownEventTokenReturnsEmpty() {
-    Optional<Event> found = eventRepository.findByEventToken(UUID.randomUUID());
+    Optional<Event> found = eventRepository.findByEventToken(EventToken.generate());
 
     assertThat(found).isEmpty();
   }
@@ -60,11 +62,12 @@ class EventPersistenceAdapterTest {
         OffsetDateTime.of(2026, 3, 4, 12, 0, 0, 0, ZoneOffset.UTC);
 
     var event = new Event();
-    event.setEventToken(UUID.randomUUID());
-    event.setOrganizerToken(UUID.randomUUID());
+    event.setEventToken(EventToken.generate());
+    event.setOrganizerToken(OrganizerToken.generate());
     event.setTitle("Full Event");
     event.setDescription("A detailed description");
     event.setDateTime(dateTime);
+    event.setTimezone(ZoneId.of("Europe/Berlin"));
     event.setLocation("Berlin, Germany");
     event.setExpiryDate(expiryDate);
     event.setCreatedAt(createdAt);
@@ -77,6 +80,7 @@ class EventPersistenceAdapterTest {
     assertThat(found.getTitle()).isEqualTo("Full Event");
     assertThat(found.getDescription()).isEqualTo("A detailed description");
     assertThat(found.getDateTime().toInstant()).isEqualTo(dateTime.toInstant());
+    assertThat(found.getTimezone()).isEqualTo(ZoneId.of("Europe/Berlin"));
     assertThat(found.getLocation()).isEqualTo("Berlin, Germany");
     assertThat(found.getExpiryDate()).isEqualTo(expiryDate);
     assertThat(found.getCreatedAt().toInstant()).isEqualTo(createdAt.toInstant());
@@ -84,11 +88,12 @@ class EventPersistenceAdapterTest {
 
   private Event buildEvent() {
     var event = new Event();
-    event.setEventToken(UUID.randomUUID());
-    event.setOrganizerToken(UUID.randomUUID());
+    event.setEventToken(EventToken.generate());
+    event.setOrganizerToken(OrganizerToken.generate());
     event.setTitle("Test Event");
     event.setDescription("Test description");
     event.setDateTime(OffsetDateTime.now().plusDays(7));
+    event.setTimezone(ZoneId.of("Europe/Berlin"));
     event.setLocation("Somewhere");
     event.setExpiryDate(LocalDate.now().plusDays(30));
     event.setCreatedAt(OffsetDateTime.now());

backend/src/test/java/de/fete/application/service/EventServiceTest.java

@@ -9,13 +9,14 @@ import static org.mockito.Mockito.when;
 
 import de.fete.domain.model.CreateEventCommand;
 import de.fete.domain.model.Event;
+import de.fete.domain.model.EventToken;
 import de.fete.domain.port.out.EventRepository;
 import java.time.Clock;
 import java.time.Instant;
 import java.time.LocalDate;
 import java.time.OffsetDateTime;
 import java.time.ZoneId;
-import java.time.ZoneOffset;
+import java.util.Optional;
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
 import org.junit.jupiter.api.extension.ExtendWith;
@@ -30,6 +31,7 @@ class EventServiceTest {
   private static final Instant FIXED_INSTANT =
       LocalDate.of(2026, 3, 5).atStartOfDay(ZONE).toInstant();
   private static final Clock FIXED_CLOCK = Clock.fixed(FIXED_INSTANT, ZONE);
+  private static final LocalDate TODAY = LocalDate.ofInstant(FIXED_INSTANT, ZONE);
 
   @Mock
   private EventRepository eventRepository;
@@ -49,35 +51,21 @@ class EventServiceTest {
     var command = new CreateEventCommand(
         "Birthday Party",
         "Come celebrate!",
-        OffsetDateTime.of(2026, 6, 15, 20, 0, 0, 0, ZoneOffset.ofHours(2)),
+        TODAY.plusDays(90).atStartOfDay(ZONE).toOffsetDateTime(),
+        ZONE,
         "Berlin",
-        LocalDate.of(2026, 7, 15)
+        TODAY.plusDays(120)
     );
 
     Event result = eventService.createEvent(command);
 
     assertThat(result.getTitle()).isEqualTo("Birthday Party");
     assertThat(result.getDescription()).isEqualTo("Come celebrate!");
+    assertThat(result.getTimezone()).isEqualTo(ZONE);
     assertThat(result.getLocation()).isEqualTo("Berlin");
     assertThat(result.getEventToken()).isNotNull();
     assertThat(result.getOrganizerToken()).isNotNull();
-    assertThat(result.getCreatedAt()).isEqualTo(OffsetDateTime.now(FIXED_CLOCK));
-  }
-
-  @Test
-  void eventTokenAndOrganizerTokenAreDifferent() {
-    when(eventRepository.save(any(Event.class)))
-        .thenAnswer(invocation -> invocation.getArgument(0));
-
-    var command = new CreateEventCommand(
-        "Test", null,
-        OffsetDateTime.now(FIXED_CLOCK).plusDays(1), null,
-        LocalDate.now(FIXED_CLOCK).plusDays(30)
-    );
-
-    Event result = eventService.createEvent(command);
-
-    assertThat(result.getEventToken()).isNotEqualTo(result.getOrganizerToken());
+    assertThat(result.getCreatedAt()).isEqualTo(OffsetDateTime.ofInstant(FIXED_INSTANT, ZONE));
   }
 
   @Test
@@ -87,8 +75,8 @@ class EventServiceTest {
 
     var command = new CreateEventCommand(
         "Test", null,
-        OffsetDateTime.now(FIXED_CLOCK).plusDays(1), null,
-        LocalDate.now(FIXED_CLOCK).plusDays(30)
+        TODAY.plusDays(10).atStartOfDay(ZONE).toOffsetDateTime(), ZONE, null,
+        TODAY.plusDays(11)
     );
 
     eventService.createEvent(command);
@@ -102,8 +90,8 @@ class EventServiceTest {
   void expiryDateTodayThrowsException() {
     var command = new CreateEventCommand(
         "Test", null,
-        OffsetDateTime.now(FIXED_CLOCK).plusDays(1), null,
-        LocalDate.now(FIXED_CLOCK)
+        TODAY.plusDays(10).atStartOfDay(ZONE).toOffsetDateTime(), ZONE, null,
+        TODAY
     );
 
     assertThatThrownBy(() -> eventService.createEvent(command))
@@ -114,8 +102,8 @@ class EventServiceTest {
   void expiryDateInPastThrowsException() {
     var command = new CreateEventCommand(
         "Test", null,
-        OffsetDateTime.now(FIXED_CLOCK).plusDays(1), null,
-        LocalDate.now(FIXED_CLOCK).minusDays(5)
+        TODAY.plusDays(10).atStartOfDay(ZONE).toOffsetDateTime(), ZONE, null,
+        TODAY.minusDays(5)
     );
 
     assertThatThrownBy(() -> eventService.createEvent(command))
@@ -129,12 +117,102 @@ class EventServiceTest {
 
     var command = new CreateEventCommand(
         "Test", null,
-        OffsetDateTime.now(FIXED_CLOCK).plusDays(1), null,
-        LocalDate.now(FIXED_CLOCK).plusDays(1)
+        TODAY.plusDays(1).atStartOfDay(ZONE).toOffsetDateTime(), ZONE, null,
+        TODAY.plusDays(2)
     );
 
     Event result = eventService.createEvent(command);
 
-    assertThat(result.getExpiryDate()).isEqualTo(LocalDate.of(2026, 3, 6));
+    assertThat(result.getExpiryDate()).isEqualTo(TODAY.plusDays(2));
+  }
+
+  @Test
+  void expiryDateSameAsEventDateThrowsException() {
+    var command = new CreateEventCommand(
+        "Test", null,
+        TODAY.plusDays(10).atStartOfDay(ZONE).toOffsetDateTime(),
+        ZONE, null,
+        TODAY.plusDays(10)
+    );
+
+    assertThatThrownBy(() -> eventService.createEvent(command))
+        .isInstanceOf(ExpiryDateBeforeEventException.class);
+  }
+
+  @Test
+  void expiryDateBeforeEventDateThrowsException() {
+    var command = new CreateEventCommand(
+        "Test", null,
+        TODAY.plusDays(10).atStartOfDay(ZONE).toOffsetDateTime(),
+        ZONE, null,
+        TODAY.plusDays(5)
+    );
+
+    assertThatThrownBy(() -> eventService.createEvent(command))
+        .isInstanceOf(ExpiryDateBeforeEventException.class);
+  }
+
+  @Test
+  void expiryDateDayAfterEventDateSucceeds() {
+    when(eventRepository.save(any(Event.class)))
+        .thenAnswer(invocation -> invocation.getArgument(0));
+
+    var command = new CreateEventCommand(
+        "Test", null,
+        TODAY.plusDays(10).atStartOfDay(ZONE).toOffsetDateTime(),
+        ZONE, null,
+        TODAY.plusDays(11)
+    );
+
+    Event result = eventService.createEvent(command);
+
+    assertThat(result.getExpiryDate()).isEqualTo(TODAY.plusDays(11));
+  }
+
+  // --- GetEventUseCase tests (T004) ---
+
+  @Test
+  void getByEventTokenReturnsEvent() {
+    EventToken token = EventToken.generate();
+    var event = new Event();
+    event.setEventToken(token);
+    event.setTitle("Found Event");
+    when(eventRepository.findByEventToken(token))
+        .thenReturn(Optional.of(event));
+
+    Optional<Event> result = eventService.getByEventToken(token);
+
+    assertThat(result).isPresent();
+    assertThat(result.get().getTitle()).isEqualTo("Found Event");
+  }
+
+  @Test
+  void getByEventTokenReturnsEmptyForUnknownToken() {
+    EventToken token = EventToken.generate();
+    when(eventRepository.findByEventToken(token))
+        .thenReturn(Optional.empty());
+
+    Optional<Event> result = eventService.getByEventToken(token);
+
+    assertThat(result).isEmpty();
+  }
+
+  // --- Timezone validation tests (T006) ---
+
+  @Test
+  void createEventWithValidTimezoneSucceeds() {
+    when(eventRepository.save(any(Event.class)))
+        .thenAnswer(invocation -> invocation.getArgument(0));
+
+    var command = new CreateEventCommand(
+        "Test", null,
+        TODAY.plusDays(10).atStartOfDay(ZONE).toOffsetDateTime(),
+        ZoneId.of("America/New_York"), null,
+        TODAY.plusDays(11)
+    );
+
+    Event result = eventService.createEvent(command);
+
+    assertThat(result.getTimezone()).isEqualTo(ZoneId.of("America/New_York"));
   }
 }

backend/src/test/java/de/fete/application/service/RsvpServiceTest.java

@@ -0,0 +1,137 @@
+package de.fete.application.service;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assertions.assertThatThrownBy;
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+
+import de.fete.domain.model.Event;
+import de.fete.domain.model.EventToken;
+import de.fete.domain.model.OrganizerToken;
+import de.fete.domain.model.Rsvp;
+import de.fete.domain.port.out.EventRepository;
+import de.fete.domain.port.out.RsvpRepository;
+import java.time.Clock;
+import java.time.Instant;
+import java.time.LocalDate;
+import java.time.OffsetDateTime;
+import java.time.ZoneId;
+import java.time.ZoneOffset;
+import java.util.Optional;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.mockito.ArgumentCaptor;
+import org.mockito.Mock;
+import org.mockito.junit.jupiter.MockitoExtension;
+
+@ExtendWith(MockitoExtension.class)
+class RsvpServiceTest {
+
+  private static final ZoneId ZONE = ZoneId.of("Europe/Berlin");
+  private static final Instant NOW = Instant.parse("2026-03-08T12:00:00Z");
+  private static final Clock FIXED_CLOCK = Clock.fixed(NOW, ZONE);
+  private static final LocalDate TODAY = LocalDate.ofInstant(NOW, ZONE);
+
+  @Mock
+  private EventRepository eventRepository;
+
+  @Mock
+  private RsvpRepository rsvpRepository;
+
+  private RsvpService rsvpService;
+
+  @BeforeEach
+  void setUp() {
+    rsvpService = new RsvpService(eventRepository, rsvpRepository, FIXED_CLOCK);
+  }
+
+  @Test
+  void createRsvpSucceedsForActiveEvent() {
+    Event event = buildActiveEvent();
+    EventToken token = event.getEventToken();
+    when(eventRepository.findByEventToken(token)).thenReturn(Optional.of(event));
+    when(rsvpRepository.save(any(Rsvp.class)))
+        .thenAnswer(invocation -> invocation.getArgument(0));
+
+    Rsvp result = rsvpService.createRsvp(token, "Max Mustermann");
+
+    assertThat(result.getName()).isEqualTo("Max Mustermann");
+    assertThat(result.getRsvpToken()).isNotNull();
+    assertThat(result.getEventId()).isEqualTo(event.getId());
+  }
+
+  @Test
+  void createRsvpPersistsViaRepository() {
+    Event event = buildActiveEvent();
+    EventToken token = event.getEventToken();
+    when(eventRepository.findByEventToken(token)).thenReturn(Optional.of(event));
+    when(rsvpRepository.save(any(Rsvp.class)))
+        .thenAnswer(invocation -> invocation.getArgument(0));
+
+    rsvpService.createRsvp(token, "Test Guest");
+
+    ArgumentCaptor<Rsvp> captor = ArgumentCaptor.forClass(Rsvp.class);
+    verify(rsvpRepository).save(captor.capture());
+    assertThat(captor.getValue().getName()).isEqualTo("Test Guest");
+    assertThat(captor.getValue().getEventId()).isEqualTo(event.getId());
+  }
+
+  @Test
+  void createRsvpThrowsWhenEventNotFound() {
+    EventToken token = EventToken.generate();
+    when(eventRepository.findByEventToken(token)).thenReturn(Optional.empty());
+
+    assertThatThrownBy(() -> rsvpService.createRsvp(token, "Guest"))
+        .isInstanceOf(EventNotFoundException.class);
+  }
+
+  @Test
+  void createRsvpTrimsName() {
+    Event event = buildActiveEvent();
+    EventToken token = event.getEventToken();
+    when(eventRepository.findByEventToken(token)).thenReturn(Optional.of(event));
+    when(rsvpRepository.save(any(Rsvp.class)))
+        .thenAnswer(invocation -> invocation.getArgument(0));
+
+    Rsvp result = rsvpService.createRsvp(token, "  Max  ");
+
+    assertThat(result.getName()).isEqualTo("Max");
+  }
+
+  @Test
+  void createRsvpThrowsWhenEventExpired() {
+    var event = buildActiveEvent();
+    event.setExpiryDate(TODAY.minusDays(1));
+    EventToken token = event.getEventToken();
+    when(eventRepository.findByEventToken(token)).thenReturn(Optional.of(event));
+
+    assertThatThrownBy(() -> rsvpService.createRsvp(token, "Late Guest"))
+        .isInstanceOf(EventExpiredException.class);
+  }
+
+  @Test
+  void createRsvpThrowsWhenEventExpiresToday() {
+    var event = buildActiveEvent();
+    event.setExpiryDate(TODAY);
+    EventToken token = event.getEventToken();
+    when(eventRepository.findByEventToken(token)).thenReturn(Optional.of(event));
+
+    assertThatThrownBy(() -> rsvpService.createRsvp(token, "Late Guest"))
+        .isInstanceOf(EventExpiredException.class);
+  }
+
+  private Event buildActiveEvent() {
+    var event = new Event();
+    event.setId(1L);
+    event.setEventToken(EventToken.generate());
+    event.setOrganizerToken(OrganizerToken.generate());
+    event.setTitle("Test Event");
+    event.setDateTime(OffsetDateTime.of(2026, 6, 15, 20, 0, 0, 0, ZoneOffset.ofHours(2)));
+    event.setTimezone(ZONE);
+    event.setExpiryDate(TODAY.plusDays(30));
+    event.setCreatedAt(OffsetDateTime.now());
+    return event;
+  }
+}

frontend/e2e/event-create.spec.ts

@@ -12,7 +12,7 @@ test.describe('US-1: Create an event', () => {
     await expect(page.getByText('Expiry date is required.')).toBeVisible()
   })
 
-  test('creates an event and redirects to stub page', async ({ page }) => {
+  test('creates an event and redirects to event detail page', async ({ page }) => {
     await page.goto('/create')
 
     await page.getByLabel(/title/i).fill('Summer BBQ')
@@ -24,7 +24,6 @@ test.describe('US-1: Create an event', () => {
     await page.getByRole('button', { name: /create event/i }).click()
 
     await expect(page).toHaveURL(/\/events\/.+/)
-    await expect(page.getByText('Event created!')).toBeVisible()
   })
 
   test('stores event data in localStorage after creation', async ({ page }) => {

frontend/e2e/event-rsvp.spec.ts

@@ -0,0 +1,185 @@
+import { http, HttpResponse } from 'msw'
+import { test, expect } from './msw-setup'
+
+const fullEvent = {
+  eventToken: 'a1b2c3d4-e5f6-7890-abcd-ef1234567890',
+  title: 'Summer BBQ',
+  description: 'Bring your own drinks!',
+  dateTime: '2026-03-15T20:00:00+01:00',
+  timezone: 'Europe/Berlin',
+  location: 'Central Park, NYC',
+  attendeeCount: 12,
+  expired: false,
+}
+
+test.describe('US1: RSVP submission flow', () => {
+  test('submits RSVP, updates attendee count, and persists in localStorage', async ({ page, network }) => {
+    network.use(
+      http.get('*/api/events/:token', () => {
+        return HttpResponse.json(fullEvent)
+      }),
+      http.post('*/api/events/:token/rsvps', () => {
+        return HttpResponse.json(
+          { rsvpToken: 'd4e5f6a7-b8c9-0123-4567-890abcdef012', name: 'Max Mustermann' },
+          { status: 201 },
+        )
+      }),
+    )
+
+    await page.goto(`/events/${fullEvent.eventToken}`)
+
+    // CTA is visible
+    const cta = page.getByRole('button', { name: "I'm attending" })
+    await expect(cta).toBeVisible()
+
+    // Open bottom sheet
+    await cta.click()
+    const dialog = page.getByRole('dialog', { name: 'RSVP' })
+    await expect(dialog).toBeVisible()
+
+    // Fill name and submit
+    await dialog.getByLabel('Your name').fill('Max Mustermann')
+    await dialog.getByRole('button', { name: 'Count me in' }).click()
+
+    // Bottom sheet closes, status bar appears
+    await expect(dialog).not.toBeVisible()
+    await expect(page.getByText("You're attending!")).toBeVisible()
+    await expect(cta).not.toBeVisible()
+
+    // Attendee count incremented
+    await expect(page.getByText('13')).toBeVisible()
+
+    // Verify localStorage
+    const stored = await page.evaluate(() => {
+      const raw = localStorage.getItem('fete:events')
+      return raw ? JSON.parse(raw) : null
+    })
+    expect(stored).toEqual(
+      expect.arrayContaining([
+        expect.objectContaining({
+          eventToken: 'a1b2c3d4-e5f6-7890-abcd-ef1234567890',
+          rsvpToken: 'd4e5f6a7-b8c9-0123-4567-890abcdef012',
+          rsvpName: 'Max Mustermann',
+        }),
+      ]),
+    )
+  })
+
+  test('shows validation error when name is empty', async ({ page, network }) => {
+    network.use(
+      http.get('*/api/events/:token', () => {
+        return HttpResponse.json(fullEvent)
+      }),
+    )
+
+    await page.goto(`/events/${fullEvent.eventToken}`)
+    await page.getByRole('button', { name: "I'm attending" }).click()
+
+    const dialog = page.getByRole('dialog', { name: 'RSVP' })
+    await dialog.getByRole('button', { name: 'Count me in' }).click()
+
+    await expect(page.getByText('Please enter your name.')).toBeVisible()
+  })
+
+  test('restores RSVP status from localStorage on page load', async ({ page, network }) => {
+    network.use(
+      http.get('*/api/events/:token', () => {
+        return HttpResponse.json(fullEvent)
+      }),
+    )
+
+    // Pre-seed localStorage
+    await page.goto('/')
+    await page.evaluate(() => {
+      localStorage.setItem(
+        'fete:events',
+        JSON.stringify([
+          {
+            eventToken: 'a1b2c3d4-e5f6-7890-abcd-ef1234567890',
+            title: 'Summer BBQ',
+            dateTime: '2026-03-15T20:00:00+01:00',
+            expiryDate: '',
+            rsvpToken: 'existing-rsvp-token',
+            rsvpName: 'Anna',
+          },
+        ]),
+      )
+    })
+
+    await page.goto(`/events/${fullEvent.eventToken}`)
+
+    // Status bar should show, not CTA
+    await expect(page.getByText("You're attending!")).toBeVisible()
+    await expect(page.getByRole('button', { name: "I'm attending" })).not.toBeVisible()
+  })
+
+  test('shows error when server is unreachable during RSVP', async ({ page, network }) => {
+    network.use(
+      http.get('*/api/events/:token', () => {
+        return HttpResponse.json(fullEvent)
+      }),
+      http.post('*/api/events/:token/rsvps', () => {
+        return HttpResponse.json(
+          { type: 'about:blank', title: 'Bad Request', status: 400 },
+          { status: 400, headers: { 'Content-Type': 'application/problem+json' } },
+        )
+      }),
+    )
+
+    await page.goto(`/events/${fullEvent.eventToken}`)
+    await page.getByRole('button', { name: "I'm attending" }).click()
+
+    const dialog = page.getByRole('dialog', { name: 'RSVP' })
+    await dialog.getByLabel('Your name').fill('Max')
+    await dialog.getByRole('button', { name: 'Count me in' }).click()
+
+    await expect(page.getByText('Could not submit RSVP. Please try again.')).toBeVisible()
+  })
+
+  test('does not show RSVP bar for organizer', async ({ page, network }) => {
+    network.use(
+      http.get('*/api/events/:token', () => {
+        return HttpResponse.json(fullEvent)
+      }),
+    )
+
+    // Pre-seed localStorage with organizer token
+    await page.goto('/')
+    await page.evaluate(() => {
+      localStorage.setItem(
+        'fete:events',
+        JSON.stringify([
+          {
+            eventToken: 'a1b2c3d4-e5f6-7890-abcd-ef1234567890',
+            organizerToken: 'org-token-123',
+            title: 'Summer BBQ',
+            dateTime: '2026-03-15T20:00:00+01:00',
+            expiryDate: '',
+          },
+        ]),
+      )
+    })
+
+    await page.goto(`/events/${fullEvent.eventToken}`)
+
+    // Event content should load
+    await expect(page.getByText('Summer BBQ')).toBeVisible()
+
+    // But no RSVP bar
+    await expect(page.getByRole('button', { name: "I'm attending" })).not.toBeVisible()
+    await expect(page.getByText("You're attending!")).not.toBeVisible()
+  })
+
+  test('does not show RSVP bar on expired event', async ({ page, network }) => {
+    network.use(
+      http.get('*/api/events/:token', () => {
+        return HttpResponse.json({ ...fullEvent, expired: true })
+      }),
+    )
+
+    await page.goto(`/events/${fullEvent.eventToken}`)
+
+    await expect(page.getByText('This event has ended.')).toBeVisible()
+    await expect(page.getByRole('button', { name: "I'm attending" })).not.toBeVisible()
+  })
+})

frontend/e2e/event-view.spec.ts

@@ -0,0 +1,127 @@
+import { http, HttpResponse } from 'msw'
+import { test, expect } from './msw-setup'
+
+const fullEvent = {
+  eventToken: 'a1b2c3d4-e5f6-7890-abcd-ef1234567890',
+  title: 'Summer BBQ',
+  description: 'Bring your own drinks!',
+  dateTime: '2026-03-15T20:00:00+01:00',
+  timezone: 'Europe/Berlin',
+  location: 'Central Park, NYC',
+  attendeeCount: 12,
+  expired: false,
+}
+
+test.describe('US-1: View event details', () => {
+  test('displays all event fields for a valid event', async ({ page, network }) => {
+    network.use(
+      http.get('*/api/events/:token', () => {
+        return HttpResponse.json(fullEvent)
+      }),
+    )
+
+    await page.goto(`/events/${fullEvent.eventToken}`)
+
+    await expect(page.getByRole('heading', { name: 'Summer BBQ' })).toBeVisible()
+    await expect(page.getByText('Bring your own drinks!')).toBeVisible()
+    await expect(page.getByText('Central Park, NYC')).toBeVisible()
+    await expect(page.getByText('12')).toBeVisible()
+    await expect(page.getByText('Europe/Berlin')).toBeVisible()
+    await expect(page.getByText('2026')).toBeVisible()
+  })
+
+  test('does not load external resources', async ({ page, network }) => {
+    const externalRequests: string[] = []
+    page.on('request', (req) => {
+      const url = new URL(req.url())
+      if (!['localhost', '127.0.0.1'].includes(url.hostname)) {
+        externalRequests.push(req.url())
+      }
+    })
+
+    network.use(
+      http.get('*/api/events/:token', () => {
+        return HttpResponse.json(fullEvent)
+      }),
+    )
+
+    await page.goto(`/events/${fullEvent.eventToken}`)
+    await expect(page.getByRole('heading', { name: 'Summer BBQ' })).toBeVisible()
+
+    expect(externalRequests).toEqual([])
+  })
+})
+
+test.describe('US-2: View expired event', () => {
+  test('shows "event has ended" banner for expired event', async ({ page, network }) => {
+    network.use(
+      http.get('*/api/events/:token', () => {
+        return HttpResponse.json({ ...fullEvent, expired: true })
+      }),
+    )
+
+    await page.goto(`/events/${fullEvent.eventToken}`)
+
+    await expect(page.getByText('This event has ended.')).toBeVisible()
+  })
+})
+
+test.describe('US-4: Event not found', () => {
+  test('shows "event not found" for unknown token', async ({ page, network }) => {
+    network.use(
+      http.get('*/api/events/:token', () => {
+        return HttpResponse.json(
+          { type: 'urn:problem-type:event-not-found', title: 'Event Not Found', status: 404, detail: 'Event not found.' },
+          { status: 404, headers: { 'Content-Type': 'application/problem+json' } },
+        )
+      }),
+    )
+
+    await page.goto('/events/00000000-0000-0000-0000-000000000000')
+
+    await expect(page.getByText('Event not found.')).toBeVisible()
+    // No event data visible
+    await expect(page.locator('.detail__title')).not.toBeVisible()
+  })
+})
+
+test.describe('Server error', () => {
+  test('shows error message and retry button on 500', async ({ page, network }) => {
+    network.use(
+      http.get('*/api/events/:token', () => {
+        return HttpResponse.json(
+          { type: 'about:blank', title: 'Internal Server Error', status: 500, detail: 'An unexpected error occurred.' },
+          { status: 500, headers: { 'Content-Type': 'application/problem+json' } },
+        )
+      }),
+    )
+
+    await page.goto(`/events/${fullEvent.eventToken}`)
+
+    await expect(page.getByText('Something went wrong.')).toBeVisible()
+    await expect(page.getByRole('button', { name: 'Retry' })).toBeVisible()
+  })
+
+  test('retry button re-fetches the event', async ({ page, network }) => {
+    let callCount = 0
+    network.use(
+      http.get('*/api/events/:token', () => {
+        callCount++
+        if (callCount === 1) {
+          return HttpResponse.json(
+            { type: 'about:blank', title: 'Error', status: 500 },
+            { status: 500, headers: { 'Content-Type': 'application/problem+json' } },
+          )
+        }
+        return HttpResponse.json(fullEvent)
+      }),
+    )
+
+    await page.goto(`/events/${fullEvent.eventToken}`)
+    await expect(page.getByText('Something went wrong.')).toBeVisible()
+
+    await page.getByRole('button', { name: 'Retry' }).click()
+
+    await expect(page.getByRole('heading', { name: 'Summer BBQ' })).toBeVisible()
+  })
+})

frontend/package-lock.json

@@ -23,17 +23,17 @@
         "@vitest/eslint-plugin": "^1.6.9",
         "@vue/eslint-config-typescript": "^14.7.0",
         "@vue/test-utils": "^2.4.6",
-        "@vue/tsconfig": "^0.8.1",
+        "@vue/tsconfig": "^0.9.0",
         "eslint": "^10.0.2",
         "eslint-config-prettier": "^10.1.8",
-        "eslint-plugin-oxlint": "~1.50.0",
+        "eslint-plugin-oxlint": "~1.51.0",
         "eslint-plugin-vue": "~10.8.0",
         "jiti": "^2.6.1",
         "jsdom": "^28.1.0",
         "msw": "^2.12.10",
         "npm-run-all2": "^8.0.4",
         "openapi-typescript": "^7.13.0",
-        "oxlint": "~1.50.0",
+        "oxlint": "~1.51.0",
         "prettier": "3.8.1",
         "typescript": "~5.9.3",
         "vite": "^7.3.1",
@@ -1201,15 +1201,15 @@
       }
     },
     "node_modules/@eslint/config-array": {
-      "version": "0.23.2",
-      "resolved": "https://registry.npmjs.org/@eslint/config-array/-/config-array-0.23.2.tgz",
-      "integrity": "sha512-YF+fE6LV4v5MGWRGj7G404/OZzGNepVF8fxk7jqmqo3lrza7a0uUcDnROGRBG1WFC1omYUS/Wp1f42i0M+3Q3A==",
+      "version": "0.23.3",
+      "resolved": "https://registry.npmjs.org/@eslint/config-array/-/config-array-0.23.3.tgz",
+      "integrity": "sha512-j+eEWmB6YYLwcNOdlwQ6L2OsptI/LO6lNBuLIqe5R7RetD658HLoF+Mn7LzYmAWWNNzdC6cqP+L6r8ujeYXWLw==",
       "dev": true,
       "license": "Apache-2.0",
       "dependencies": {
-        "@eslint/object-schema": "^3.0.2",
+        "@eslint/object-schema": "^3.0.3",
         "debug": "^4.3.1",
-        "minimatch": "^10.2.1"
+        "minimatch": "^10.2.4"
       },
       "engines": {
         "node": "^20.19.0 || ^22.13.0 || >=24"
@@ -1229,9 +1229,9 @@
       }
     },
     "node_modules/@eslint/core": {
-      "version": "1.1.0",
-      "resolved": "https://registry.npmjs.org/@eslint/core/-/core-1.1.0.tgz",
-      "integrity": "sha512-/nr9K9wkr3P1EzFTdFdMoLuo1PmIxjmwvPozwoSodjNBdefGujXQUF93u1DDZpEaTuDvMsIQddsd35BwtrW9Xw==",
+      "version": "1.1.1",
+      "resolved": "https://registry.npmjs.org/@eslint/core/-/core-1.1.1.tgz",
+      "integrity": "sha512-QUPblTtE51/7/Zhfv8BDwO0qkkzQL7P/aWWbqcf4xWLEYn1oKjdO0gglQBB4GAsu7u6wjijbCmzsUTy6mnk6oQ==",
       "dev": true,
       "license": "Apache-2.0",
       "dependencies": {
@@ -1242,9 +1242,9 @@
       }
     },
     "node_modules/@eslint/object-schema": {
-      "version": "3.0.2",
-      "resolved": "https://registry.npmjs.org/@eslint/object-schema/-/object-schema-3.0.2.tgz",
-      "integrity": "sha512-HOy56KJt48Bx8KmJ+XGQNSUMT/6dZee/M54XyUyuvTvPXJmsERRvBchsUVx1UMe1WwIH49XLAczNC7V2INsuUw==",
+      "version": "3.0.3",
+      "resolved": "https://registry.npmjs.org/@eslint/object-schema/-/object-schema-3.0.3.tgz",
+      "integrity": "sha512-iM869Pugn9Nsxbh/YHRqYiqd23AmIbxJOcpUMOuWCVNdoQJ5ZtwL6h3t0bcZzJUlC3Dq9jCFCESBZnX0GTv7iQ==",
       "dev": true,
       "license": "Apache-2.0",
       "engines": {
@@ -1252,13 +1252,13 @@
       }
     },
     "node_modules/@eslint/plugin-kit": {
-      "version": "0.6.0",
-      "resolved": "https://registry.npmjs.org/@eslint/plugin-kit/-/plugin-kit-0.6.0.tgz",
-      "integrity": "sha512-bIZEUzOI1jkhviX2cp5vNyXQc6olzb2ohewQubuYlMXZ2Q/XjBO0x0XhGPvc9fjSIiUN0vw+0hq53BJ4eQSJKQ==",
+      "version": "0.6.1",
+      "resolved": "https://registry.npmjs.org/@eslint/plugin-kit/-/plugin-kit-0.6.1.tgz",
+      "integrity": "sha512-iH1B076HoAshH1mLpHMgwdGeTs0CYwL0SPMkGuSebZrwBp16v415e9NZXg2jtrqPVQjf6IANe2Vtlr5KswtcZQ==",
       "dev": true,
       "license": "Apache-2.0",
       "dependencies": {
-        "@eslint/core": "^1.1.0",
+        "@eslint/core": "^1.1.1",
         "levn": "^0.4.1"
       },
       "engines": {
@@ -1727,9 +1727,9 @@
       "license": "MIT"
     },
     "node_modules/@oxlint/binding-android-arm-eabi": {
-      "version": "1.50.0",
-      "resolved": "https://registry.npmjs.org/@oxlint/binding-android-arm-eabi/-/binding-android-arm-eabi-1.50.0.tgz",
-      "integrity": "sha512-G7MRGk/6NCe+L8ntonRdZP7IkBfEpiZ/he3buLK6JkLgMHgJShXZ+BeOwADmspXez7U7F7L1Anf4xLSkLHiGTg==",
+      "version": "1.51.0",
+      "resolved": "https://registry.npmjs.org/@oxlint/binding-android-arm-eabi/-/binding-android-arm-eabi-1.51.0.tgz",
+      "integrity": "sha512-jJYIqbx4sX+suIxWstc4P7SzhEwb4ArWA2KVrmEuu9vH2i0qM6QIHz/ehmbGE4/2fZbpuMuBzTl7UkfNoqiSgw==",
       "cpu": [
         "arm"
       ],
@@ -1744,9 +1744,9 @@
       }
     },
     "node_modules/@oxlint/binding-android-arm64": {
-      "version": "1.50.0",
-      "resolved": "https://registry.npmjs.org/@oxlint/binding-android-arm64/-/binding-android-arm64-1.50.0.tgz",
-      "integrity": "sha512-GeSuMoJWCVpovJi/e3xDSNgjeR8WEZ6MCXL6EtPiCIM2NTzv7LbflARINTXTJy2oFBYyvdf/l2PwHzYo6EdXvg==",
+      "version": "1.51.0",
+      "resolved": "https://registry.npmjs.org/@oxlint/binding-android-arm64/-/binding-android-arm64-1.51.0.tgz",
+      "integrity": "sha512-GtXyBCcH4ti98YdiMNCrpBNGitx87EjEWxevnyhcBK12k/Vu4EzSB45rzSC4fGFUD6sQgeaxItRCEEWeVwPafw==",
       "cpu": [
         "arm64"
       ],
@@ -1761,9 +1761,9 @@
       }
     },
     "node_modules/@oxlint/binding-darwin-arm64": {
-      "version": "1.50.0",
-      "resolved": "https://registry.npmjs.org/@oxlint/binding-darwin-arm64/-/binding-darwin-arm64-1.50.0.tgz",
-      "integrity": "sha512-w3SY5YtxGnxCHPJ8Twl3KmS9oja1gERYk3AMoZ7Hv8P43ZtB6HVfs02TxvarxfL214Tm3uzvc2vn+DhtUNeKnw==",
+      "version": "1.51.0",
+      "resolved": "https://registry.npmjs.org/@oxlint/binding-darwin-arm64/-/binding-darwin-arm64-1.51.0.tgz",
+      "integrity": "sha512-3QJbeYaMHn6Bh2XeBXuITSsbnIctyTjvHf5nRjKYrT9pPeErNIpp5VDEeAXC0CZSwSVTsc8WOSDwgrAI24JolQ==",
       "cpu": [
         "arm64"
       ],
@@ -1778,9 +1778,9 @@
       }
     },
     "node_modules/@oxlint/binding-darwin-x64": {
-      "version": "1.50.0",
-      "resolved": "https://registry.npmjs.org/@oxlint/binding-darwin-x64/-/binding-darwin-x64-1.50.0.tgz",
-      "integrity": "sha512-hNfogDqy7tvmllXKBSlHo6k5x7dhTUVOHbMSE15CCAcXzmqf5883aPvBYPOq9AE7DpDUQUZ1kVE22YbiGW+tuw==",
+      "version": "1.51.0",
+      "resolved": "https://registry.npmjs.org/@oxlint/binding-darwin-x64/-/binding-darwin-x64-1.51.0.tgz",
+      "integrity": "sha512-NzErhMaTEN1cY0E8C5APy74lw5VwsNfJfVPBMWPVQLqAbO0k4FFLjvHURvkUL+Y18Wu+8Vs1kbqPh2hjXYA4pg==",
       "cpu": [
         "x64"
       ],
@@ -1795,9 +1795,9 @@
       }
     },
     "node_modules/@oxlint/binding-freebsd-x64": {
-      "version": "1.50.0",
-      "resolved": "https://registry.npmjs.org/@oxlint/binding-freebsd-x64/-/binding-freebsd-x64-1.50.0.tgz",
-      "integrity": "sha512-ykZevOWEyu0nsxolA911ucxpEv0ahw8jfEeGWOwwb/VPoE4xoexuTOAiPNlWZNJqANlJl7yp8OyzCtXTUAxotw==",
+      "version": "1.51.0",
+      "resolved": "https://registry.npmjs.org/@oxlint/binding-freebsd-x64/-/binding-freebsd-x64-1.51.0.tgz",
+      "integrity": "sha512-msAIh3vPAoKoHlOE/oe6Q5C/n9umypv/k81lED82ibrJotn+3YG2Qp1kiR8o/Dg5iOEU97c6tl0utxcyFenpFw==",
       "cpu": [
         "x64"
       ],
@@ -1812,9 +1812,9 @@
       }
     },
     "node_modules/@oxlint/binding-linux-arm-gnueabihf": {
-      "version": "1.50.0",
-      "resolved": "https://registry.npmjs.org/@oxlint/binding-linux-arm-gnueabihf/-/binding-linux-arm-gnueabihf-1.50.0.tgz",
-      "integrity": "sha512-hif3iDk7vo5GGJ4OLCCZAf2vjnU9FztGw4L0MbQL0M2iY9LKFtDMMiQAHmkF0PQGQMVbTYtPdXCLKVgdkiqWXQ==",
+      "version": "1.51.0",
+      "resolved": "https://registry.npmjs.org/@oxlint/binding-linux-arm-gnueabihf/-/binding-linux-arm-gnueabihf-1.51.0.tgz",
+      "integrity": "sha512-CqQPcvqYyMe9ZBot2stjGogEzk1z8gGAngIX7srSzrzexmXixwVxBdFZyxTVM0CjGfDeV+Ru0w25/WNjlMM2Hw==",
       "cpu": [
         "arm"
       ],
@@ -1829,9 +1829,9 @@
       }
     },
     "node_modules/@oxlint/binding-linux-arm-musleabihf": {
-      "version": "1.50.0",
-      "resolved": "https://registry.npmjs.org/@oxlint/binding-linux-arm-musleabihf/-/binding-linux-arm-musleabihf-1.50.0.tgz",
-      "integrity": "sha512-dVp9iSssiGAnTNey2Ruf6xUaQhdnvcFOJyRWd/mu5o2jVbFK15E5fbWGeFRfmuobu5QXuROtFga44+7DOS3PLg==",
+      "version": "1.51.0",
+      "resolved": "https://registry.npmjs.org/@oxlint/binding-linux-arm-musleabihf/-/binding-linux-arm-musleabihf-1.51.0.tgz",
+      "integrity": "sha512-dstrlYQgZMnyOssxSbolGCge/sDbko12N/35RBNuqLpoPbft2aeBidBAb0dvQlyBd9RJ6u8D4o4Eh8Un6iTgyQ==",
       "cpu": [
         "arm"
       ],
@@ -1846,9 +1846,9 @@
       }
     },
     "node_modules/@oxlint/binding-linux-arm64-gnu": {
-      "version": "1.50.0",
-      "resolved": "https://registry.npmjs.org/@oxlint/binding-linux-arm64-gnu/-/binding-linux-arm64-gnu-1.50.0.tgz",
-      "integrity": "sha512-1cT7yz2HA910CKA9NkH1ZJo50vTtmND2fkoW1oyiSb0j6WvNtJ0Wx2zoySfXWc/c+7HFoqRK5AbEoL41LOn9oA==",
+      "version": "1.51.0",
+      "resolved": "https://registry.npmjs.org/@oxlint/binding-linux-arm64-gnu/-/binding-linux-arm64-gnu-1.51.0.tgz",
+      "integrity": "sha512-QEjUpXO7d35rP1/raLGGbAsBLLGZIzV3ZbeSjqWlD3oRnxpRIZ6iL4o51XQHkconn3uKssc+1VKdtHJ81BBhDA==",
       "cpu": [
         "arm64"
       ],
@@ -1863,9 +1863,9 @@
       }
     },
     "node_modules/@oxlint/binding-linux-arm64-musl": {
-      "version": "1.50.0",
-      "resolved": "https://registry.npmjs.org/@oxlint/binding-linux-arm64-musl/-/binding-linux-arm64-musl-1.50.0.tgz",
-      "integrity": "sha512-++B3k/HEPFVlj89cOz8kWfQccMZB/aWL9AhsW7jPIkG++63Mpwb2cE9XOEsd0PATbIan78k2Gky+09uWM1d/gQ==",
+      "version": "1.51.0",
+      "resolved": "https://registry.npmjs.org/@oxlint/binding-linux-arm64-musl/-/binding-linux-arm64-musl-1.51.0.tgz",
+      "integrity": "sha512-YSJua5irtG4DoMAjUapDTPhkQLHhBIY0G9JqlZS6/SZPzqDkPku/1GdWs0D6h/wyx0Iz31lNCfIaWKBQhzP0wQ==",
       "cpu": [
         "arm64"
       ],
@@ -1880,9 +1880,9 @@
       }
     },
     "node_modules/@oxlint/binding-linux-ppc64-gnu": {
-      "version": "1.50.0",
-      "resolved": "https://registry.npmjs.org/@oxlint/binding-linux-ppc64-gnu/-/binding-linux-ppc64-gnu-1.50.0.tgz",
-      "integrity": "sha512-Z9b/KpFMkx66w3gVBqjIC1AJBTZAGoI9+U+K5L4QM0CB/G0JSNC1es9b3Y0Vcrlvtdn8A+IQTkYjd/Q0uCSaZw==",
+      "version": "1.51.0",
+      "resolved": "https://registry.npmjs.org/@oxlint/binding-linux-ppc64-gnu/-/binding-linux-ppc64-gnu-1.51.0.tgz",
+      "integrity": "sha512-7L4Wj2IEUNDETKssB9IDYt16T6WlF+X2jgC/hBq3diGHda9vJLpAgb09+D3quFq7TdkFtI7hwz/jmuQmQFPc1Q==",
       "cpu": [
         "ppc64"
       ],
@@ -1897,9 +1897,9 @@
       }
     },
     "node_modules/@oxlint/binding-linux-riscv64-gnu": {
-      "version": "1.50.0",
-      "resolved": "https://registry.npmjs.org/@oxlint/binding-linux-riscv64-gnu/-/binding-linux-riscv64-gnu-1.50.0.tgz",
-      "integrity": "sha512-jvmuIw8wRSohsQlFNIST5uUwkEtEJmOQYr33bf/K2FrFPXHhM4KqGekI3ShYJemFS/gARVacQFgBzzJKCAyJjg==",
+      "version": "1.51.0",
+      "resolved": "https://registry.npmjs.org/@oxlint/binding-linux-riscv64-gnu/-/binding-linux-riscv64-gnu-1.51.0.tgz",
+      "integrity": "sha512-cBUHqtOXy76G41lOB401qpFoKx1xq17qYkhWrLSM7eEjiHM9sOtYqpr6ZdqCnN9s6ZpzudX4EkeHOFH2E9q0vA==",
       "cpu": [
         "riscv64"
       ],
@@ -1914,9 +1914,9 @@
       }
     },
     "node_modules/@oxlint/binding-linux-riscv64-musl": {
-      "version": "1.50.0",
-      "resolved": "https://registry.npmjs.org/@oxlint/binding-linux-riscv64-musl/-/binding-linux-riscv64-musl-1.50.0.tgz",
-      "integrity": "sha512-x+UrN47oYNh90nmAAyql8eQaaRpHbDPu5guasDg10+OpszUQ3/1+1J6zFMmV4xfIEgTcUXG/oI5fxJhF4eWCNA==",
+      "version": "1.51.0",
+      "resolved": "https://registry.npmjs.org/@oxlint/binding-linux-riscv64-musl/-/binding-linux-riscv64-musl-1.51.0.tgz",
+      "integrity": "sha512-WKbg8CysgZcHfZX0ixQFBRSBvFZUHa3SBnEjHY2FVYt2nbNJEjzTxA3ZR5wMU0NOCNKIAFUFvAh5/XJKPRJuJg==",
       "cpu": [
         "riscv64"
       ],
@@ -1931,9 +1931,9 @@
       }
     },
     "node_modules/@oxlint/binding-linux-s390x-gnu": {
-      "version": "1.50.0",
-      "resolved": "https://registry.npmjs.org/@oxlint/binding-linux-s390x-gnu/-/binding-linux-s390x-gnu-1.50.0.tgz",
-      "integrity": "sha512-i/JLi2ljLUIVfekMj4ISmdt+Hn11wzYUdRRrkVUYsCWw7zAy5xV7X9iA+KMyM156LTFympa7s3oKBjuCLoTAUQ==",
+      "version": "1.51.0",
+      "resolved": "https://registry.npmjs.org/@oxlint/binding-linux-s390x-gnu/-/binding-linux-s390x-gnu-1.51.0.tgz",
+      "integrity": "sha512-N1QRUvJTxqXNSu35YOufdjsAVmKVx5bkrggOWAhTWBc3J4qjcBwr1IfyLh/6YCg8sYRSR1GraldS9jUgJL/U4A==",
       "cpu": [
         "s390x"
       ],
@@ -1948,9 +1948,9 @@
       }
     },
     "node_modules/@oxlint/binding-linux-x64-gnu": {
-      "version": "1.50.0",
-      "resolved": "https://registry.npmjs.org/@oxlint/binding-linux-x64-gnu/-/binding-linux-x64-gnu-1.50.0.tgz",
-      "integrity": "sha512-/C7brhn6c6UUPccgSPCcpLQXcp+xKIW/3sji/5VZ8/OItL3tQ2U7KalHz887UxxSQeEOmd1kY6lrpuwFnmNqOA==",
+      "version": "1.51.0",
+      "resolved": "https://registry.npmjs.org/@oxlint/binding-linux-x64-gnu/-/binding-linux-x64-gnu-1.51.0.tgz",
+      "integrity": "sha512-e0Mz0DizsCoqNIjeOg6OUKe8JKJWZ5zZlwsd05Bmr51Jo3AOL4UJnPvwKumr4BBtBrDZkCmOLhCvDGm95nJM2g==",
       "cpu": [
         "x64"
       ],
@@ -1965,9 +1965,9 @@
       }
     },
     "node_modules/@oxlint/binding-linux-x64-musl": {
-      "version": "1.50.0",
-      "resolved": "https://registry.npmjs.org/@oxlint/binding-linux-x64-musl/-/binding-linux-x64-musl-1.50.0.tgz",
-      "integrity": "sha512-oDR1f+bGOYU8LfgtEW8XtotWGB63ghtcxk5Jm6IDTCk++rTA/IRMsjOid2iMd+1bW+nP9Mdsmcdc7VbPD3+iyQ==",
+      "version": "1.51.0",
+      "resolved": "https://registry.npmjs.org/@oxlint/binding-linux-x64-musl/-/binding-linux-x64-musl-1.51.0.tgz",
+      "integrity": "sha512-wD8HGTWhYBKXvRDvoBVB1y+fEYV01samhWQSy1Zkxq2vpezvMnjaFKRuiP6tBNITLGuffbNDEXOwcAhJ3gI5Ug==",
       "cpu": [
         "x64"
       ],
@@ -1982,9 +1982,9 @@
       }
     },
     "node_modules/@oxlint/binding-openharmony-arm64": {
-      "version": "1.50.0",
-      "resolved": "https://registry.npmjs.org/@oxlint/binding-openharmony-arm64/-/binding-openharmony-arm64-1.50.0.tgz",
-      "integrity": "sha512-4CmRGPp5UpvXyu4jjP9Tey/SrXDQLRvZXm4pb4vdZBxAzbFZkCyh0KyRy4txld/kZKTJlW4TO8N1JKrNEk+mWw==",
+      "version": "1.51.0",
+      "resolved": "https://registry.npmjs.org/@oxlint/binding-openharmony-arm64/-/binding-openharmony-arm64-1.51.0.tgz",
+      "integrity": "sha512-5NSwQ2hDEJ0GPXqikjWtwzgAQCsS7P9aLMNenjjKa+gknN3lTCwwwERsT6lKXSirfU3jLjexA2XQvQALh5h27w==",
       "cpu": [
         "arm64"
       ],
@@ -1999,9 +1999,9 @@
       }
     },
     "node_modules/@oxlint/binding-win32-arm64-msvc": {
-      "version": "1.50.0",
-      "resolved": "https://registry.npmjs.org/@oxlint/binding-win32-arm64-msvc/-/binding-win32-arm64-msvc-1.50.0.tgz",
-      "integrity": "sha512-Fq0M6vsGcFsSfeuWAACDhd5KJrO85ckbEfe1EGuBj+KPyJz7KeWte2fSFrFGmNKNXyhEMyx4tbgxiWRujBM2KQ==",
+      "version": "1.51.0",
+      "resolved": "https://registry.npmjs.org/@oxlint/binding-win32-arm64-msvc/-/binding-win32-arm64-msvc-1.51.0.tgz",
+      "integrity": "sha512-JEZyah1M0RHMw8d+jjSSJmSmO8sABA1J1RtrHYujGPeCkYg1NeH0TGuClpe2h5QtioRTaF57y/TZfn/2IFV6fA==",
       "cpu": [
         "arm64"
       ],
@@ -2016,9 +2016,9 @@
       }
     },
     "node_modules/@oxlint/binding-win32-ia32-msvc": {
-      "version": "1.50.0",
-      "resolved": "https://registry.npmjs.org/@oxlint/binding-win32-ia32-msvc/-/binding-win32-ia32-msvc-1.50.0.tgz",
-      "integrity": "sha512-qTdWR9KwY/vxJGhHVIZG2eBOhidOQvOwzDxnX+jhW/zIVacal1nAhR8GLkiywW8BIFDkQKXo/zOfT+/DY+ns/w==",
+      "version": "1.51.0",
+      "resolved": "https://registry.npmjs.org/@oxlint/binding-win32-ia32-msvc/-/binding-win32-ia32-msvc-1.51.0.tgz",
+      "integrity": "sha512-q3cEoKH6kwjz/WRyHwSf0nlD2F5Qw536kCXvmlSu+kaShzgrA0ojmh45CA81qL+7udfCaZL2SdKCZlLiGBVFlg==",
       "cpu": [
         "ia32"
       ],
@@ -2033,9 +2033,9 @@
       }
     },
     "node_modules/@oxlint/binding-win32-x64-msvc": {
-      "version": "1.50.0",
-      "resolved": "https://registry.npmjs.org/@oxlint/binding-win32-x64-msvc/-/binding-win32-x64-msvc-1.50.0.tgz",
-      "integrity": "sha512-682t7npLC4G2Ca+iNlI9fhAKTcFPYYXJjwoa88H4q+u5HHHlsnL/gHULapX3iqp+A8FIJbgdylL5KMYo2LaluQ==",
+      "version": "1.51.0",
+      "resolved": "https://registry.npmjs.org/@oxlint/binding-win32-x64-msvc/-/binding-win32-x64-msvc-1.51.0.tgz",
+      "integrity": "sha512-Q14+fOGb9T28nWF/0EUsYqERiRA7cl1oy4TJrGmLaqhm+aO2cV+JttboHI3CbdeMCAyDI1+NoSlrM7Melhp/cw==",
       "cpu": [
         "x64"
       ],
@@ -3423,9 +3423,9 @@
       }
     },
     "node_modules/@vue/tsconfig": {
-      "version": "0.8.1",
-      "resolved": "https://registry.npmjs.org/@vue/tsconfig/-/tsconfig-0.8.1.tgz",
-      "integrity": "sha512-aK7feIWPXFSUhsCP9PFqPyFOcz4ENkb8hZ2pneL6m2UjCkccvaOhC/5KCKluuBufvp2KzkbdA2W2pk20vLzu3g==",
+      "version": "0.9.0",
+      "resolved": "https://registry.npmjs.org/@vue/tsconfig/-/tsconfig-0.9.0.tgz",
+      "integrity": "sha512-RP+v9Cpbsk1ZVXltCHHkYBr7+624x6gcijJXVjIcsYk7JXqvIpRtMwU2ARLvWDhmy9ffdFYxhsfJnPztADBohQ==",
       "dev": true,
       "license": "MIT",
       "peerDependencies": {
@@ -4304,18 +4304,18 @@
       }
     },
     "node_modules/eslint": {
-      "version": "10.0.2",
-      "resolved": "https://registry.npmjs.org/eslint/-/eslint-10.0.2.tgz",
-      "integrity": "sha512-uYixubwmqJZH+KLVYIVKY1JQt7tysXhtj21WSvjcSmU5SVNzMus1bgLe+pAt816yQ8opKfheVVoPLqvVMGejYw==",
+      "version": "10.0.3",
+      "resolved": "https://registry.npmjs.org/eslint/-/eslint-10.0.3.tgz",
+      "integrity": "sha512-COV33RzXZkqhG9P2rZCFl9ZmJ7WL+gQSCRzE7RhkbclbQPtLAWReL7ysA0Sh4c8Im2U9ynybdR56PV0XcKvqaQ==",
       "dev": true,
       "license": "MIT",
       "dependencies": {
         "@eslint-community/eslint-utils": "^4.8.0",
         "@eslint-community/regexpp": "^4.12.2",
-        "@eslint/config-array": "^0.23.2",
+        "@eslint/config-array": "^0.23.3",
         "@eslint/config-helpers": "^0.5.2",
-        "@eslint/core": "^1.1.0",
-        "@eslint/plugin-kit": "^0.6.0",
+        "@eslint/core": "^1.1.1",
+        "@eslint/plugin-kit": "^0.6.1",
         "@humanfs/node": "^0.16.6",
         "@humanwhocodes/module-importer": "^1.0.1",
         "@humanwhocodes/retry": "^0.4.2",
@@ -4324,7 +4324,7 @@
         "cross-spawn": "^7.0.6",
         "debug": "^4.3.2",
         "escape-string-regexp": "^4.0.0",
-        "eslint-scope": "^9.1.1",
+        "eslint-scope": "^9.1.2",
         "eslint-visitor-keys": "^5.0.1",
         "espree": "^11.1.1",
         "esquery": "^1.7.0",
@@ -4337,7 +4337,7 @@
         "imurmurhash": "^0.1.4",
         "is-glob": "^4.0.0",
         "json-stable-stringify-without-jsonify": "^1.0.1",
-        "minimatch": "^10.2.1",
+        "minimatch": "^10.2.4",
         "natural-compare": "^1.4.0",
         "optionator": "^0.9.3"
       },
@@ -4376,9 +4376,9 @@
       }
     },
     "node_modules/eslint-plugin-oxlint": {
-      "version": "1.50.0",
-      "resolved": "https://registry.npmjs.org/eslint-plugin-oxlint/-/eslint-plugin-oxlint-1.50.0.tgz",
-      "integrity": "sha512-QAxeFeUHuekmLkuRLdzHH8Z0JvC7482OaQ3jlUMdEd0gcS6m+MYHei3Favoew9DdvTQT7yHxrm7BL0iXoenb6w==",
+      "version": "1.51.0",
+      "resolved": "https://registry.npmjs.org/eslint-plugin-oxlint/-/eslint-plugin-oxlint-1.51.0.tgz",
+      "integrity": "sha512-lct8LD1AxfHF1PcsuK6mFYals+zX0mx/WP2G4i16h0iR8jpT3xCfGTmTNwXiImcevzGIiJ/VDBgQ7t0B9z2Jeg==",
       "dev": true,
       "license": "MIT",
       "dependencies": {
@@ -4418,9 +4418,9 @@
       }
     },
     "node_modules/eslint-scope": {
-      "version": "9.1.1",
-      "resolved": "https://registry.npmjs.org/eslint-scope/-/eslint-scope-9.1.1.tgz",
-      "integrity": "sha512-GaUN0sWim5qc8KVErfPBWmc31LEsOkrUJbvJZV+xuL3u2phMUK4HIvXlWAakfC8W4nzlK+chPEAkYOYb5ZScIw==",
+      "version": "9.1.2",
+      "resolved": "https://registry.npmjs.org/eslint-scope/-/eslint-scope-9.1.2.tgz",
+      "integrity": "sha512-xS90H51cKw0jltxmvmHy2Iai1LIqrfbw57b79w/J7MfvDfkIkFZ+kj6zC3BjtUwh150HsSSdxXZcsuv72miDFQ==",
       "dev": true,
       "license": "BSD-2-Clause",
       "dependencies": {
@@ -5776,9 +5776,9 @@
       "license": "MIT"
     },
     "node_modules/oxlint": {
-      "version": "1.50.0",
-      "resolved": "https://registry.npmjs.org/oxlint/-/oxlint-1.50.0.tgz",
-      "integrity": "sha512-iSJ4IZEICBma8cZX7kxIIz9PzsYLF2FaLAYN6RKu7VwRVKdu7RIgpP99bTZaGl//Yao7fsaGZLSEo5xBrI5ReQ==",
+      "version": "1.51.0",
+      "resolved": "https://registry.npmjs.org/oxlint/-/oxlint-1.51.0.tgz",
+      "integrity": "sha512-g6DNPaV9/WI9MoX2XllafxQuxwY1TV++j7hP8fTJByVBuCoVtm3dy9f/2vtH/HU40JztcgWF4G7ua+gkainklQ==",
       "dev": true,
       "license": "MIT",
       "bin": {
@@ -5791,28 +5791,28 @@
         "url": "https://github.com/sponsors/Boshen"
       },
       "optionalDependencies": {
-        "@oxlint/binding-android-arm-eabi": "1.50.0",
-        "@oxlint/binding-android-arm64": "1.50.0",
-        "@oxlint/binding-darwin-arm64": "1.50.0",
-        "@oxlint/binding-darwin-x64": "1.50.0",
-        "@oxlint/binding-freebsd-x64": "1.50.0",
-        "@oxlint/binding-linux-arm-gnueabihf": "1.50.0",
-        "@oxlint/binding-linux-arm-musleabihf": "1.50.0",
-        "@oxlint/binding-linux-arm64-gnu": "1.50.0",
-        "@oxlint/binding-linux-arm64-musl": "1.50.0",
-        "@oxlint/binding-linux-ppc64-gnu": "1.50.0",
-        "@oxlint/binding-linux-riscv64-gnu": "1.50.0",
-        "@oxlint/binding-linux-riscv64-musl": "1.50.0",
-        "@oxlint/binding-linux-s390x-gnu": "1.50.0",
-        "@oxlint/binding-linux-x64-gnu": "1.50.0",
-        "@oxlint/binding-linux-x64-musl": "1.50.0",
-        "@oxlint/binding-openharmony-arm64": "1.50.0",
-        "@oxlint/binding-win32-arm64-msvc": "1.50.0",
-        "@oxlint/binding-win32-ia32-msvc": "1.50.0",
-        "@oxlint/binding-win32-x64-msvc": "1.50.0"
+        "@oxlint/binding-android-arm-eabi": "1.51.0",
+        "@oxlint/binding-android-arm64": "1.51.0",
+        "@oxlint/binding-darwin-arm64": "1.51.0",
+        "@oxlint/binding-darwin-x64": "1.51.0",
+        "@oxlint/binding-freebsd-x64": "1.51.0",
+        "@oxlint/binding-linux-arm-gnueabihf": "1.51.0",
+        "@oxlint/binding-linux-arm-musleabihf": "1.51.0",
+        "@oxlint/binding-linux-arm64-gnu": "1.51.0",
+        "@oxlint/binding-linux-arm64-musl": "1.51.0",
+        "@oxlint/binding-linux-ppc64-gnu": "1.51.0",
+        "@oxlint/binding-linux-riscv64-gnu": "1.51.0",
+        "@oxlint/binding-linux-riscv64-musl": "1.51.0",
+        "@oxlint/binding-linux-s390x-gnu": "1.51.0",
+        "@oxlint/binding-linux-x64-gnu": "1.51.0",
+        "@oxlint/binding-linux-x64-musl": "1.51.0",
+        "@oxlint/binding-openharmony-arm64": "1.51.0",
+        "@oxlint/binding-win32-arm64-msvc": "1.51.0",
+        "@oxlint/binding-win32-ia32-msvc": "1.51.0",
+        "@oxlint/binding-win32-x64-msvc": "1.51.0"
       },
       "peerDependencies": {
-        "oxlint-tsgolint": ">=0.14.1"
+        "oxlint-tsgolint": ">=0.15.0"
       },
       "peerDependenciesMeta": {
         "oxlint-tsgolint": {

frontend/package.json

@@ -35,17 +35,17 @@
     "@vitest/eslint-plugin": "^1.6.9",
     "@vue/eslint-config-typescript": "^14.7.0",
     "@vue/test-utils": "^2.4.6",
-    "@vue/tsconfig": "^0.8.1",
+    "@vue/tsconfig": "^0.9.0",
     "eslint": "^10.0.2",
     "eslint-config-prettier": "^10.1.8",
-    "eslint-plugin-oxlint": "~1.50.0",
+    "eslint-plugin-oxlint": "~1.51.0",
     "eslint-plugin-vue": "~10.8.0",
     "jiti": "^2.6.1",
     "jsdom": "^28.1.0",
     "msw": "^2.12.10",
     "npm-run-all2": "^8.0.4",
     "openapi-typescript": "^7.13.0",
-    "oxlint": "~1.50.0",
+    "oxlint": "~1.51.0",
     "prettier": "3.8.1",
     "typescript": "~5.9.3",
     "vite": "^7.3.1",

frontend/src/assets/main.css

@@ -163,6 +163,19 @@ textarea.form-field {
   padding-left: 0.25rem;
 }
 
+/* Skeleton shimmer loading state */
+.skeleton {
+  background: linear-gradient(90deg, var(--color-card) 25%, #e0e0e0 50%, var(--color-card) 75%);
+  background-size: 200% 100%;
+  animation: shimmer 1.5s infinite;
+  border-radius: var(--radius-card);
+}
+
+@keyframes shimmer {
+  0% { background-position: 200% 0; }
+  100% { background-position: -200% 0; }
+}
+
 /* Utility */
 .text-center {
   text-align: center;
@@ -179,3 +192,34 @@ textarea.form-field {
   white-space: nowrap;
   border: 0;
 }
+
+/* Bottom sheet form */
+.sheet-title {
+  font-size: 1.2rem;
+  font-weight: 700;
+  color: var(--color-text);
+}
+
+.rsvp-form {
+  display: flex;
+  flex-direction: column;
+  gap: var(--spacing-md);
+}
+
+.rsvp-form__label {
+  font-size: 0.85rem;
+  font-weight: 700;
+  color: var(--color-text);
+  padding-left: 0.25rem;
+}
+
+.rsvp-form__field-error {
+  color: #d32f2f;
+  font-size: 0.875rem;
+  font-weight: 600;
+  padding-left: 0.25rem;
+}
+
+.rsvp-form__error {
+  text-align: center;
+}

frontend/src/components/BottomSheet.vue

@@ -0,0 +1,96 @@
+<template>
+  <Teleport to="body">
+    <Transition name="sheet">
+      <div v-if="open" class="sheet-backdrop" @click.self="$emit('close')" @keydown.escape="$emit('close')">
+        <div class="sheet" role="dialog" aria-modal="true" :aria-label="label" ref="sheetEl" tabindex="-1">
+          <div class="sheet__handle" aria-hidden="true" />
+          <slot />
+        </div>
+      </div>
+    </Transition>
+  </Teleport>
+</template>
+
+<script setup lang="ts">
+import { ref, watch, nextTick } from 'vue'
+
+defineProps<{
+  open: boolean
+  label: string
+}>()
+
+defineEmits<{
+  close: []
+}>()
+
+const sheetEl = ref<HTMLElement | null>(null)
+
+watch(
+  () => sheetEl.value,
+  async (el) => {
+    if (el) {
+      await nextTick()
+      const firstInput = el.querySelector<HTMLElement>('input, textarea, button[type="submit"]')
+      if (firstInput) {
+        firstInput.focus()
+      } else {
+        el.focus()
+      }
+    }
+  },
+)
+</script>
+
+<style scoped>
+.sheet-backdrop {
+  position: fixed;
+  inset: 0;
+  background: rgba(0, 0, 0, 0.4);
+  display: flex;
+  align-items: flex-end;
+  justify-content: center;
+  z-index: 100;
+}
+
+.sheet {
+  background: var(--color-card);
+  border-radius: 20px 20px 0 0;
+  padding: var(--spacing-lg) var(--spacing-xl) var(--spacing-2xl);
+  width: 100%;
+  max-width: var(--content-max-width);
+  display: flex;
+  flex-direction: column;
+  gap: var(--spacing-lg);
+  outline: none;
+}
+
+.sheet__handle {
+  width: 36px;
+  height: 4px;
+  background: #ccc;
+  border-radius: 2px;
+  align-self: center;
+  flex-shrink: 0;
+}
+
+/* Transition */
+.sheet-enter-active,
+.sheet-leave-active {
+  transition: opacity 0.25s ease;
+}
+
+.sheet-enter-active .sheet,
+.sheet-leave-active .sheet {
+  transition: transform 0.25s ease;
+}
+
+.sheet-enter-from,
+.sheet-leave-to {
+  opacity: 0;
+}
+
+.sheet-enter-from .sheet,
+.sheet-leave-to .sheet {
+  transform: translateY(100%);
+}
+</style>

frontend/src/components/RsvpBar.vue

@@ -0,0 +1,75 @@
+<template>
+  <div class="rsvp-bar">
+    <div class="rsvp-bar__inner">
+      <!-- Status state: already RSVPed -->
+      <div v-if="hasRsvp" class="rsvp-bar__status">
+        <span class="rsvp-bar__check" aria-hidden="true">✓</span>
+        <span class="rsvp-bar__text">You're attending!</span>
+      </div>
+
+      <!-- CTA state: no RSVP yet -->
+      <button v-else class="btn-primary rsvp-bar__cta" type="button" @click="$emit('open')">
+        I'm attending
+      </button>
+    </div>
+  </div>
+</template>
+
+<script setup lang="ts">
+defineProps<{
+  hasRsvp?: boolean
+}>()
+
+defineEmits<{
+  open: []
+}>()
+</script>
+
+<style scoped>
+.rsvp-bar {
+  position: fixed;
+  bottom: 0;
+  left: 0;
+  right: 0;
+  display: flex;
+  justify-content: center;
+  z-index: 50;
+  padding: var(--spacing-md) var(--content-padding);
+  padding-bottom: calc(var(--spacing-md) + env(safe-area-inset-bottom, 0px));
+}
+
+.rsvp-bar__inner {
+  width: 100%;
+  max-width: var(--content-max-width);
+}
+
+.rsvp-bar__cta {
+  width: 100%;
+}
+
+.rsvp-bar__status {
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  gap: var(--spacing-xs);
+  background: var(--color-card);
+  border-radius: var(--radius-card);
+  padding: var(--spacing-md) var(--spacing-lg);
+  box-shadow: var(--shadow-card);
+  font-weight: 600;
+  font-size: 0.95rem;
+  color: var(--color-text);
+}
+
+.rsvp-bar__check {
+  color: #4caf50;
+  font-size: 1.1rem;
+  font-weight: 700;
+}
+
+.rsvp-bar__text {
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+</style>

frontend/src/components/__tests__/BottomSheet.spec.ts

@@ -0,0 +1,51 @@
+import { describe, it, expect } from 'vitest'
+import { mount } from '@vue/test-utils'
+import BottomSheet from '../BottomSheet.vue'
+
+function mountSheet(open = true) {
+  return mount(BottomSheet, {
+    props: { open, label: 'Test Sheet' },
+    slots: { default: '<p>Sheet content</p>' },
+    attachTo: document.body,
+  })
+}
+
+describe('BottomSheet', () => {
+  it('renders slot content when open', () => {
+    const wrapper = mountSheet(true)
+    expect(document.body.textContent).toContain('Sheet content')
+    wrapper.unmount()
+  })
+
+  it('does not render content when closed', () => {
+    const wrapper = mountSheet(false)
+    expect(document.body.querySelector('[role="dialog"]')).toBeNull()
+    wrapper.unmount()
+  })
+
+  it('has aria-modal and aria-label on the dialog', () => {
+    const wrapper = mountSheet(true)
+    const dialog = document.body.querySelector('[role="dialog"]')!
+    expect(dialog.getAttribute('aria-modal')).toBe('true')
+    expect(dialog.getAttribute('aria-label')).toBe('Test Sheet')
+    wrapper.unmount()
+  })
+
+  it('emits close when backdrop is clicked', async () => {
+    const wrapper = mountSheet(true)
+    const backdrop = document.body.querySelector('.sheet-backdrop')! as HTMLElement
+    await backdrop.click()
+    // Vue test utils tracks emitted events on the wrapper
+    expect(wrapper.emitted('close')).toBeTruthy()
+    wrapper.unmount()
+  })
+
+  it('emits close on Escape key', async () => {
+    const wrapper = mountSheet(true)
+    const backdrop = document.body.querySelector('.sheet-backdrop')! as HTMLElement
+    backdrop.dispatchEvent(new KeyboardEvent('keydown', { key: 'Escape', bubbles: true }))
+    await wrapper.vm.$nextTick()
+    expect(wrapper.emitted('close')).toBeTruthy()
+    wrapper.unmount()
+  })
+})

frontend/src/components/__tests__/RsvpBar.spec.ts

@@ -0,0 +1,30 @@
+import { describe, it, expect } from 'vitest'
+import { mount } from '@vue/test-utils'
+import RsvpBar from '../RsvpBar.vue'
+
+describe('RsvpBar', () => {
+  it('renders CTA button when hasRsvp is false', () => {
+    const wrapper = mount(RsvpBar)
+    expect(wrapper.find('.rsvp-bar__cta').exists()).toBe(true)
+    expect(wrapper.find('.rsvp-bar__cta').text()).toBe("I'm attending")
+    expect(wrapper.find('.rsvp-bar__status').exists()).toBe(false)
+  })
+
+  it('renders status text when hasRsvp is true', () => {
+    const wrapper = mount(RsvpBar, { props: { hasRsvp: true } })
+    expect(wrapper.find('.rsvp-bar__status').exists()).toBe(true)
+    expect(wrapper.find('.rsvp-bar__text').text()).toBe("You're attending!")
+    expect(wrapper.find('.rsvp-bar__cta').exists()).toBe(false)
+  })
+
+  it('emits open when CTA button is clicked', async () => {
+    const wrapper = mount(RsvpBar)
+    await wrapper.find('.rsvp-bar__cta').trigger('click')
+    expect(wrapper.emitted('open')).toHaveLength(1)
+  })
+
+  it('does not render CTA button when hasRsvp is true', () => {
+    const wrapper = mount(RsvpBar, { props: { hasRsvp: true } })
+    expect(wrapper.find('button').exists()).toBe(false)
+  })
+})

frontend/src/composables/__tests__/useEventStorage.spec.ts

@@ -116,4 +116,52 @@ describe('useEventStorage', () => {
     expect(events).toHaveLength(1)
     expect(events[0]!.title).toBe('New Title')
   })
+
+  it('saves and retrieves RSVP for an existing event', () => {
+    const { saveCreatedEvent, saveRsvp, getRsvp } = useEventStorage()
+
+    saveCreatedEvent({
+      eventToken: 'abc-123',
+      title: 'Birthday',
+      dateTime: '2026-06-15T20:00:00+02:00',
+      expiryDate: '2026-07-15',
+    })
+
+    saveRsvp('abc-123', 'rsvp-token-1', 'Max', 'Birthday', '2026-06-15T20:00:00+02:00')
+
+    const rsvp = getRsvp('abc-123')
+    expect(rsvp).toEqual({ rsvpToken: 'rsvp-token-1', rsvpName: 'Max' })
+  })
+
+  it('saves RSVP for a new event (not previously stored)', () => {
+    const { saveRsvp, getRsvp, getStoredEvents } = useEventStorage()
+
+    saveRsvp('new-event', 'rsvp-token-2', 'Anna', 'Party', '2026-08-01T18:00:00+02:00')
+
+    const rsvp = getRsvp('new-event')
+    expect(rsvp).toEqual({ rsvpToken: 'rsvp-token-2', rsvpName: 'Anna' })
+
+    const events = getStoredEvents()
+    expect(events).toHaveLength(1)
+    expect(events[0]!.eventToken).toBe('new-event')
+    expect(events[0]!.title).toBe('Party')
+  })
+
+  it('returns undefined RSVP for event without RSVP', () => {
+    const { saveCreatedEvent, getRsvp } = useEventStorage()
+
+    saveCreatedEvent({
+      eventToken: 'abc-123',
+      title: 'Test',
+      dateTime: '2026-06-15T20:00:00+02:00',
+      expiryDate: '2026-07-15',
+    })
+
+    expect(getRsvp('abc-123')).toBeUndefined()
+  })
+
+  it('returns undefined RSVP for unknown event', () => {
+    const { getRsvp } = useEventStorage()
+    expect(getRsvp('unknown')).toBeUndefined()
+  })
 })

frontend/src/composables/useEventStorage.ts

@@ -4,6 +4,8 @@ export interface StoredEvent {
   title: string
   dateTime: string
   expiryDate: string
+  rsvpToken?: string
+  rsvpName?: string
 }
 
 const STORAGE_KEY = 'fete:events'
@@ -37,5 +39,25 @@ export function useEventStorage() {
     return event?.organizerToken
   }
 
-  return { saveCreatedEvent, getStoredEvents, getOrganizerToken }
+  function saveRsvp(eventToken: string, rsvpToken: string, rsvpName: string, title: string, dateTime: string): void {
+    const events = readEvents()
+    const existing = events.find((e) => e.eventToken === eventToken)
+    if (existing) {
+      existing.rsvpToken = rsvpToken
+      existing.rsvpName = rsvpName
+    } else {
+      events.push({ eventToken, title, dateTime, expiryDate: '', rsvpToken, rsvpName })
+    }
+    writeEvents(events)
+  }
+
+  function getRsvp(eventToken: string): { rsvpToken: string; rsvpName: string } | undefined {
+    const event = readEvents().find((e) => e.eventToken === eventToken)
+    if (event?.rsvpToken && event?.rsvpName) {
+      return { rsvpToken: event.rsvpToken, rsvpName: event.rsvpName }
+    }
+    return undefined
+  }
+
+  return { saveCreatedEvent, getStoredEvents, getOrganizerToken, saveRsvp, getRsvp }
 }

frontend/src/router/index.ts

@@ -17,7 +17,7 @@ const router = createRouter({
     {
       path: '/events/:token',
       name: 'event',
-      component: () => import('../views/EventStubView.vue'),
+      component: () => import('../views/EventDetailView.vue'),
     },
   ],
 })

frontend/src/views/EventCreateView.vue

@@ -184,6 +184,7 @@ async function handleSubmit() {
         title: form.title.trim(),
         description: form.description.trim() || undefined,
         dateTime: dateTimeWithOffset,
+        timezone: Intl.DateTimeFormat().resolvedOptions().timeZone,
         location: form.location.trim() || undefined,
         expiryDate: form.expiryDate,
       },

frontend/src/views/EventDetailView.vue

@@ -0,0 +1,317 @@
+<template>
+  <main class="detail">
+    <header class="detail__header">
+      <RouterLink to="/" class="detail__back" aria-label="Back to home">&larr;</RouterLink>
+      <span class="detail__brand">fete</span>
+    </header>
+
+    <!-- Loading state -->
+    <div v-if="state === 'loading'" class="detail__card" aria-busy="true" aria-label="Loading event details">
+      <div class="skeleton skeleton--title" />
+      <div class="skeleton skeleton--line" />
+      <div class="skeleton skeleton--line skeleton--short" />
+      <div class="skeleton skeleton--line" />
+    </div>
+
+    <!-- Loaded state -->
+    <div v-else-if="state === 'loaded' && event" class="detail__card">
+      <h1 class="detail__title">{{ event.title }}</h1>
+
+      <dl class="detail__fields">
+        <div class="detail__field">
+          <dt class="detail__label">Date &amp; Time</dt>
+          <dd class="detail__value">{{ formattedDateTime }}</dd>
+        </div>
+
+        <div v-if="event.description" class="detail__field">
+          <dt class="detail__label">Description</dt>
+          <dd class="detail__value">{{ event.description }}</dd>
+        </div>
+
+        <div v-if="event.location" class="detail__field">
+          <dt class="detail__label">Location</dt>
+          <dd class="detail__value">{{ event.location }}</dd>
+        </div>
+
+        <div class="detail__field">
+          <dt class="detail__label">Attendees</dt>
+          <dd class="detail__value">{{ event.attendeeCount }}</dd>
+        </div>
+      </dl>
+
+      <div v-if="event.expired" class="detail__banner detail__banner--expired" role="status">
+        This event has ended.
+      </div>
+    </div>
+
+    <!-- Not found state -->
+    <div v-else-if="state === 'not-found'" class="detail__card detail__card--center" role="status">
+      <p class="detail__message">Event not found.</p>
+    </div>
+
+    <!-- Error state -->
+    <div v-else-if="state === 'error'" class="detail__card detail__card--center" role="alert">
+      <p class="detail__message">Something went wrong.</p>
+      <button class="btn-primary" type="button" @click="fetchEvent">Retry</button>
+    </div>
+
+    <!-- RSVP bar (only for loaded, non-expired events) -->
+    <RsvpBar
+      v-if="state === 'loaded' && event && !event.expired && !isOrganizer"
+      :has-rsvp="!!rsvpName"
+      @open="sheetOpen = true"
+    />
+
+    <!-- RSVP bottom sheet -->
+    <BottomSheet :open="sheetOpen" label="RSVP" @close="sheetOpen = false">
+      <h2 class="sheet-title">RSVP</h2>
+      <form class="rsvp-form" @submit.prevent="submitRsvp" novalidate>
+        <div class="form-group">
+          <label class="rsvp-form__label" for="rsvp-name">Your name</label>
+          <input
+            id="rsvp-name"
+            v-model.trim="nameInput"
+            class="form-field"
+            type="text"
+            placeholder="e.g. Max Mustermann"
+            maxlength="100"
+            required
+            @input="nameError = ''"
+          />
+          <span v-if="nameError" class="rsvp-form__field-error" role="alert">{{ nameError }}</span>
+        </div>
+        <button class="btn-primary" type="submit" :disabled="submitting">
+          {{ submitting ? 'Sending…' : "Count me in" }}
+        </button>
+        <p v-if="submitError" class="rsvp-form__field-error rsvp-form__error" role="alert">{{ submitError }}</p>
+      </form>
+    </BottomSheet>
+  </main>
+</template>
+
+<script setup lang="ts">
+import { ref, computed, onMounted } from 'vue'
+import { RouterLink, useRoute } from 'vue-router'
+import { api } from '@/api/client'
+import { useEventStorage } from '@/composables/useEventStorage'
+import BottomSheet from '@/components/BottomSheet.vue'
+import RsvpBar from '@/components/RsvpBar.vue'
+import type { components } from '@/api/schema'
+
+type GetEventResponse = components['schemas']['GetEventResponse']
+type State = 'loading' | 'loaded' | 'not-found' | 'error'
+
+const route = useRoute()
+const { saveRsvp, getRsvp, getOrganizerToken } = useEventStorage()
+
+const state = ref<State>('loading')
+const event = ref<GetEventResponse | null>(null)
+
+// RSVP state
+const sheetOpen = ref(false)
+const nameInput = ref('')
+const nameError = ref('')
+const submitError = ref('')
+const submitting = ref(false)
+const rsvpName = ref<string | undefined>(undefined)
+const isOrganizer = ref(false)
+
+const formattedDateTime = computed(() => {
+  if (!event.value) return ''
+  const formatted = new Intl.DateTimeFormat(undefined, {
+    dateStyle: 'long',
+    timeStyle: 'short',
+  }).format(new Date(event.value.dateTime))
+  return `${formatted} (${event.value.timezone})`
+})
+
+async function fetchEvent() {
+  state.value = 'loading'
+  event.value = null
+
+  try {
+    const { data, error, response } = await api.GET('/events/{token}', {
+      params: { path: { token: route.params.token as string } },
+    })
+
+    if (error) {
+      state.value = response.status === 404 ? 'not-found' : 'error'
+      return
+    }
+
+    event.value = data!
+    state.value = 'loaded'
+
+    // Check if current user is the organizer
+    isOrganizer.value = !!getOrganizerToken(event.value.eventToken)
+
+    // Restore RSVP status from localStorage
+    const stored = getRsvp(event.value.eventToken)
+    if (stored) {
+      rsvpName.value = stored.rsvpName
+    }
+  } catch {
+    state.value = 'error'
+  }
+}
+
+async function submitRsvp() {
+  nameError.value = ''
+  submitError.value = ''
+
+  if (!nameInput.value) {
+    nameError.value = 'Please enter your name.'
+    return
+  }
+
+  if (nameInput.value.length > 100) {
+    nameError.value = 'Name must be 100 characters or fewer.'
+    return
+  }
+
+  submitting.value = true
+
+  try {
+    const { data, error } = await api.POST('/events/{token}/rsvps', {
+      params: { path: { token: route.params.token as string } },
+      body: { name: nameInput.value },
+    })
+
+    if (error) {
+      submitError.value = 'Could not submit RSVP. Please try again.'
+      return
+    }
+
+    // Persist RSVP in localStorage
+    saveRsvp(
+      event.value!.eventToken,
+      data!.rsvpToken,
+      data!.name,
+      event.value!.title,
+      event.value!.dateTime,
+    )
+
+    // Update UI
+    rsvpName.value = data!.name
+    event.value!.attendeeCount += 1
+    sheetOpen.value = false
+    nameInput.value = ''
+  } catch {
+    submitError.value = 'Could not submit RSVP. Please try again.'
+  } finally {
+    submitting.value = false
+  }
+}
+
+onMounted(fetchEvent)
+</script>
+
+<style scoped>
+.detail {
+  display: flex;
+  flex-direction: column;
+  gap: var(--spacing-2xl);
+  padding-top: var(--spacing-lg);
+}
+
+.detail__header {
+  display: flex;
+  align-items: center;
+  gap: var(--spacing-sm);
+}
+
+.detail__back {
+  color: var(--color-text-on-gradient);
+  font-size: 1.5rem;
+  text-decoration: none;
+  line-height: 1;
+}
+
+.detail__brand {
+  font-size: 1.3rem;
+  font-weight: 700;
+  color: var(--color-text-on-gradient);
+}
+
+.detail__card {
+  background: var(--color-card);
+  border-radius: var(--radius-card);
+  padding: var(--spacing-xl);
+  box-shadow: var(--shadow-card);
+  display: flex;
+  flex-direction: column;
+  gap: var(--spacing-lg);
+}
+
+.detail__card--center {
+  align-items: center;
+  text-align: center;
+}
+
+.detail__title {
+  font-size: 1.4rem;
+  font-weight: 700;
+  color: var(--color-text);
+  word-break: break-word;
+}
+
+.detail__fields {
+  display: flex;
+  flex-direction: column;
+  gap: var(--spacing-md);
+}
+
+.detail__field {
+  display: flex;
+  flex-direction: column;
+  gap: 0.15rem;
+}
+
+.detail__label {
+  font-size: 0.8rem;
+  font-weight: 700;
+  color: #888;
+  text-transform: uppercase;
+  letter-spacing: 0.04em;
+}
+
+.detail__value {
+  font-size: 0.95rem;
+  color: var(--color-text);
+  word-break: break-word;
+}
+
+.detail__banner {
+  padding: var(--spacing-sm) var(--spacing-md);
+  border-radius: var(--radius-card);
+  font-weight: 600;
+  font-size: 0.9rem;
+  text-align: center;
+}
+
+.detail__banner--expired {
+  background: #fff3e0;
+  color: #e65100;
+}
+
+.detail__message {
+  font-size: 1rem;
+  font-weight: 600;
+  color: var(--color-text);
+}
+
+/* Skeleton sizes */
+.skeleton--title {
+  height: 1.6rem;
+  width: 60%;
+}
+
+.skeleton--line {
+  height: 1rem;
+  width: 80%;
+}
+
+.skeleton--short {
+  width: 40%;
+}
+</style>

frontend/src/views/__tests__/EventCreateView.spec.ts

@@ -14,6 +14,8 @@ vi.mock('@/composables/useEventStorage', () => ({
     saveCreatedEvent: vi.fn(),
     getStoredEvents: vi.fn(() => []),
     getOrganizerToken: vi.fn(),
+    saveRsvp: vi.fn(),
+    getRsvp: vi.fn(),
   })),
 }))
 
@@ -165,6 +167,8 @@ describe('EventCreateView', () => {
       saveCreatedEvent: mockSave,
       getStoredEvents: vi.fn(() => []),
       getOrganizerToken: vi.fn(),
+      saveRsvp: vi.fn(),
+      getRsvp: vi.fn(),
     })
 
     vi.mocked(api.POST).mockResolvedValueOnce({
@@ -173,6 +177,7 @@ describe('EventCreateView', () => {
         organizerToken: 'org-456',
         title: 'Birthday Party',
         dateTime: '2026-12-25T18:00:00+01:00',
+        timezone: 'Europe/Berlin',
         expiryDate: '2026-12-24',
       },
       error: undefined,

frontend/src/views/__tests__/EventDetailView.spec.ts

@@ -0,0 +1,367 @@
+import { describe, it, expect, vi, beforeEach } from 'vitest'
+import { mount, flushPromises } from '@vue/test-utils'
+import { createRouter, createMemoryHistory } from 'vue-router'
+import EventDetailView from '../EventDetailView.vue'
+import { api } from '@/api/client'
+
+vi.mock('@/api/client', () => ({
+  api: {
+    GET: vi.fn(),
+    POST: vi.fn(),
+  },
+}))
+
+const mockSaveRsvp = vi.fn()
+const mockGetRsvp = vi.fn()
+const mockGetOrganizerToken = vi.fn()
+
+vi.mock('@/composables/useEventStorage', () => ({
+  useEventStorage: vi.fn(() => ({
+    saveCreatedEvent: vi.fn(),
+    getStoredEvents: vi.fn(() => []),
+    getOrganizerToken: mockGetOrganizerToken,
+    saveRsvp: mockSaveRsvp,
+    getRsvp: mockGetRsvp,
+  })),
+}))
+
+function createTestRouter(_token?: string) {
+  return createRouter({
+    history: createMemoryHistory(),
+    routes: [
+      { path: '/', name: 'home', component: { template: '<div />' } },
+      { path: '/events/:token', name: 'event', component: EventDetailView },
+    ],
+  })
+}
+
+async function mountWithToken(token = 'test-token') {
+  const router = createTestRouter(token)
+  await router.push(`/events/${token}`)
+  await router.isReady()
+  return mount(EventDetailView, {
+    global: { plugins: [router] },
+    attachTo: document.body,
+  })
+}
+
+const fullEvent = {
+  eventToken: 'abc-123',
+  title: 'Summer BBQ',
+  description: 'Bring your own drinks!',
+  dateTime: '2026-03-15T20:00:00+01:00',
+  timezone: 'Europe/Berlin',
+  location: 'Central Park, NYC',
+  attendeeCount: 12,
+  expired: false,
+}
+
+function mockLoadedEvent(eventOverrides = {}) {
+  vi.mocked(api.GET).mockResolvedValue({
+    data: { ...fullEvent, ...eventOverrides },
+    error: undefined,
+    response: new Response(null, { status: 200 }),
+  } as never)
+}
+
+beforeEach(() => {
+  vi.restoreAllMocks()
+  mockGetRsvp.mockReturnValue(undefined)
+  mockGetOrganizerToken.mockReturnValue(undefined)
+})
+
+describe('EventDetailView', () => {
+  // Loading state
+  it('renders skeleton shimmer placeholders while loading', async () => {
+    vi.mocked(api.GET).mockReturnValue(new Promise(() => {}))
+
+    const wrapper = await mountWithToken()
+
+    expect(wrapper.find('[aria-busy="true"]').exists()).toBe(true)
+    expect(wrapper.findAll('.skeleton').length).toBeGreaterThanOrEqual(3)
+    wrapper.unmount()
+  })
+
+  // Loaded state — all fields
+  it('renders all event fields when loaded', async () => {
+    mockLoadedEvent()
+
+    const wrapper = await mountWithToken()
+    await flushPromises()
+
+    expect(wrapper.find('.detail__title').text()).toBe('Summer BBQ')
+    expect(wrapper.text()).toContain('Bring your own drinks!')
+    expect(wrapper.text()).toContain('Central Park, NYC')
+    expect(wrapper.text()).toContain('12')
+    expect(wrapper.text()).toContain('Europe/Berlin')
+    wrapper.unmount()
+  })
+
+  // Loaded state — locale-formatted date/time
+  it('formats date/time with Intl.DateTimeFormat and timezone', async () => {
+    mockLoadedEvent()
+
+    const wrapper = await mountWithToken()
+    await flushPromises()
+
+    const dateField = wrapper.findAll('.detail__value')[0]!
+    expect(dateField.text()).toContain('(Europe/Berlin)')
+    expect(dateField.text()).toContain('2026')
+    wrapper.unmount()
+  })
+
+  // Loaded state — optional fields absent
+  it('does not render description and location when absent', async () => {
+    mockLoadedEvent({ description: undefined, location: undefined, attendeeCount: 0 })
+
+    const wrapper = await mountWithToken()
+    await flushPromises()
+
+    expect(wrapper.text()).not.toContain('Description')
+    expect(wrapper.text()).not.toContain('Location')
+    expect(wrapper.text()).toContain('0')
+    wrapper.unmount()
+  })
+
+  // Expired state
+  it('renders "event has ended" banner when expired', async () => {
+    mockLoadedEvent({ expired: true })
+
+    const wrapper = await mountWithToken()
+    await flushPromises()
+
+    expect(wrapper.text()).toContain('This event has ended.')
+    expect(wrapper.find('.detail__banner--expired').exists()).toBe(true)
+    wrapper.unmount()
+  })
+
+  // No expired banner when not expired
+  it('does not render expired banner when event is active', async () => {
+    mockLoadedEvent()
+
+    const wrapper = await mountWithToken()
+    await flushPromises()
+
+    expect(wrapper.find('.detail__banner--expired').exists()).toBe(false)
+    wrapper.unmount()
+  })
+
+  // Not found state
+  it('renders "event not found" when API returns 404', async () => {
+    vi.mocked(api.GET).mockResolvedValue({
+      data: undefined,
+      error: { type: 'about:blank', title: 'Not Found', status: 404 },
+      response: new Response(null, { status: 404 }),
+    } as never)
+
+    const wrapper = await mountWithToken()
+    await flushPromises()
+
+    expect(wrapper.text()).toContain('Event not found.')
+    expect(wrapper.find('.detail__title').exists()).toBe(false)
+    wrapper.unmount()
+  })
+
+  // Server error + retry
+  it('renders error state with retry button on server error', async () => {
+    vi.mocked(api.GET).mockResolvedValue({
+      data: undefined,
+      error: { type: 'about:blank', title: 'Internal Server Error', status: 500 },
+      response: new Response(null, { status: 500 }),
+    } as never)
+
+    const wrapper = await mountWithToken()
+    await flushPromises()
+
+    expect(wrapper.text()).toContain('Something went wrong.')
+    expect(wrapper.find('button').text()).toBe('Retry')
+    wrapper.unmount()
+  })
+
+  // Retry button re-fetches
+  it('retry button triggers a new fetch', async () => {
+    vi.mocked(api.GET)
+      .mockResolvedValueOnce({
+        data: undefined,
+        error: { type: 'about:blank', title: 'Error', status: 500 },
+        response: new Response(null, { status: 500 }),
+      } as never)
+      .mockResolvedValueOnce({
+        data: fullEvent,
+        error: undefined,
+        response: new Response(null, { status: 200 }),
+      } as never)
+
+    const wrapper = await mountWithToken()
+    await flushPromises()
+
+    expect(wrapper.text()).toContain('Something went wrong.')
+
+    await wrapper.find('button').trigger('click')
+    await flushPromises()
+
+    expect(wrapper.find('.detail__title').text()).toBe('Summer BBQ')
+    wrapper.unmount()
+  })
+
+  // RSVP bar
+  it('shows RSVP CTA bar on active event', async () => {
+    mockLoadedEvent()
+
+    const wrapper = await mountWithToken()
+    await flushPromises()
+
+    expect(wrapper.find('.rsvp-bar__cta').exists()).toBe(true)
+    expect(wrapper.find('.rsvp-bar__cta').text()).toBe("I'm attending")
+    wrapper.unmount()
+  })
+
+  it('does not show RSVP bar for organizer', async () => {
+    mockGetOrganizerToken.mockReturnValue('org-token-123')
+    mockLoadedEvent()
+
+    const wrapper = await mountWithToken()
+    await flushPromises()
+
+    expect(wrapper.find('.rsvp-bar').exists()).toBe(false)
+    expect(wrapper.find('.rsvp-bar__cta').exists()).toBe(false)
+    wrapper.unmount()
+  })
+
+  it('does not show RSVP bar on expired event', async () => {
+    mockLoadedEvent({ expired: true })
+
+    const wrapper = await mountWithToken()
+    await flushPromises()
+
+    expect(wrapper.find('.rsvp-bar__cta').exists()).toBe(false)
+    expect(wrapper.find('.rsvp-bar').exists()).toBe(false)
+    wrapper.unmount()
+  })
+
+  it('shows RSVP status bar when localStorage has RSVP', async () => {
+    mockGetRsvp.mockReturnValue({ rsvpToken: 'rsvp-1', rsvpName: 'Max' })
+    mockLoadedEvent()
+
+    const wrapper = await mountWithToken()
+    await flushPromises()
+
+    expect(wrapper.find('.rsvp-bar__status').exists()).toBe(true)
+    expect(wrapper.find('.rsvp-bar__text').text()).toBe("You're attending!")
+    expect(wrapper.find('.rsvp-bar__cta').exists()).toBe(false)
+    wrapper.unmount()
+  })
+
+  // RSVP form submission
+  it('opens bottom sheet when CTA is clicked', async () => {
+    mockLoadedEvent()
+
+    const wrapper = await mountWithToken()
+    await flushPromises()
+
+    expect(document.body.querySelector('[role="dialog"]')).toBeNull()
+
+    await wrapper.find('.rsvp-bar__cta').trigger('click')
+    await flushPromises()
+
+    expect(document.body.querySelector('[role="dialog"]')).not.toBeNull()
+    wrapper.unmount()
+  })
+
+  it('shows validation error when submitting empty name', async () => {
+    mockLoadedEvent()
+
+    const wrapper = await mountWithToken()
+    await flushPromises()
+
+    await wrapper.find('.rsvp-bar__cta').trigger('click')
+    await flushPromises()
+
+    // Form is inside Teleport — find via document.body
+    const form = document.body.querySelector('.rsvp-form')! as HTMLFormElement
+    form.dispatchEvent(new Event('submit', { bubbles: true }))
+    await flushPromises()
+
+    expect(document.body.querySelector('.rsvp-form__field-error')?.textContent).toBe('Please enter your name.')
+    expect(vi.mocked(api.POST)).not.toHaveBeenCalled()
+    wrapper.unmount()
+  })
+
+  it('submits RSVP, saves to storage, and shows status', async () => {
+    mockLoadedEvent()
+    vi.mocked(api.POST).mockResolvedValue({
+      data: { rsvpToken: 'rsvp-token-1', name: 'Max' },
+      error: undefined,
+      response: new Response(null, { status: 201 }),
+    } as never)
+
+    const wrapper = await mountWithToken()
+    await flushPromises()
+
+    // Open sheet
+    await wrapper.find('.rsvp-bar__cta').trigger('click')
+    await flushPromises()
+
+    // Fill name via Teleported input
+    const input = document.body.querySelector('#rsvp-name')! as HTMLInputElement
+    input.value = 'Max'
+    input.dispatchEvent(new Event('input', { bubbles: true }))
+    await flushPromises()
+
+    // Submit form
+    const form = document.body.querySelector('.rsvp-form')! as HTMLFormElement
+    form.dispatchEvent(new Event('submit', { bubbles: true }))
+    await flushPromises()
+
+    // Verify API call
+    expect(vi.mocked(api.POST)).toHaveBeenCalledWith('/events/{token}/rsvps', {
+      params: { path: { token: 'test-token' } },
+      body: { name: 'Max' },
+    })
+
+    // Verify storage
+    expect(mockSaveRsvp).toHaveBeenCalledWith(
+      'abc-123',
+      'rsvp-token-1',
+      'Max',
+      'Summer BBQ',
+      '2026-03-15T20:00:00+01:00',
+    )
+
+    // Verify UI switched to status
+    expect(wrapper.find('.rsvp-bar__text').text()).toBe("You're attending!")
+    expect(wrapper.find('.rsvp-bar__cta').exists()).toBe(false)
+
+    // Verify attendee count incremented
+    expect(wrapper.text()).toContain('13')
+
+    wrapper.unmount()
+  })
+
+  it('shows error when RSVP submission fails', async () => {
+    mockLoadedEvent()
+    vi.mocked(api.POST).mockResolvedValue({
+      data: undefined,
+      error: { type: 'about:blank', title: 'Bad Request', status: 400 },
+      response: new Response(null, { status: 400 }),
+    } as never)
+
+    const wrapper = await mountWithToken()
+    await flushPromises()
+
+    await wrapper.find('.rsvp-bar__cta').trigger('click')
+    await flushPromises()
+
+    const input = document.body.querySelector('#rsvp-name')! as HTMLInputElement
+    input.value = 'Max'
+    input.dispatchEvent(new Event('input', { bubbles: true }))
+    await flushPromises()
+
+    const form = document.body.querySelector('.rsvp-form')! as HTMLFormElement
+    form.dispatchEvent(new Event('submit', { bubbles: true }))
+    await flushPromises()
+
+    expect(document.body.textContent).toContain('Could not submit RSVP. Please try again.')
+    wrapper.unmount()
+  })
+})

specs/007-view-event/contracts/get-event.yaml

@@ -0,0 +1,94 @@
+# OpenAPI contract addition for GET /events/{token}
+# To be merged into backend/src/main/resources/openapi/api.yaml
+
+paths:
+  /events/{token}:
+    get:
+      operationId: getEvent
+      summary: Get public event details by token
+      tags:
+        - events
+      parameters:
+        - name: token
+          in: path
+          required: true
+          schema:
+            type: string
+            format: uuid
+          description: Public event token
+      responses:
+        "200":
+          description: Event found
+          content:
+            application/json:
+              schema:
+                $ref: "#/components/schemas/GetEventResponse"
+        "404":
+          description: Event not found
+          content:
+            application/problem+json:
+              schema:
+                $ref: "#/components/schemas/ProblemDetail"
+
+components:
+  schemas:
+    GetEventResponse:
+      type: object
+      required:
+        - eventToken
+        - title
+        - dateTime
+        - timezone
+        - attendeeCount
+        - expired
+      properties:
+        eventToken:
+          type: string
+          format: uuid
+          description: Public event token
+          example: "a1b2c3d4-e5f6-7890-abcd-ef1234567890"
+        title:
+          type: string
+          description: Event title
+          example: "Summer BBQ"
+        description:
+          type: string
+          description: Event description (absent if not set)
+          example: "Bring your own drinks!"
+        dateTime:
+          type: string
+          format: date-time
+          description: Event date/time with organizer's UTC offset
+          example: "2026-03-15T20:00:00+01:00"
+        timezone:
+          type: string
+          description: IANA timezone name of the organizer
+          example: "Europe/Berlin"
+        location:
+          type: string
+          description: Event location (absent if not set)
+          example: "Central Park, NYC"
+        attendeeCount:
+          type: integer
+          minimum: 0
+          description: Number of confirmed attendees (attending=true)
+          example: 12
+        expired:
+          type: boolean
+          description: Whether the event's expiry date has passed
+          example: false
+
+    # Modification to existing CreateEventRequest — add timezone field
+    # CreateEventRequest (additions):
+    #   timezone:
+    #     type: string
+    #     description: IANA timezone of the organizer
+    #     example: "Europe/Berlin"
+    #   (make required)
+
+    # Modification to existing CreateEventResponse — add timezone field
+    # CreateEventResponse (additions):
+    #   timezone:
+    #     type: string
+    #     description: IANA timezone of the organizer
+    #     example: "Europe/Berlin"

specs/007-view-event/data-model.md

@@ -0,0 +1,56 @@
+# Data Model: View Event Landing Page (007)
+
+**Date**: 2026-03-06
+
+## Entities
+
+### Event (modified — adds `timezone` field)
+
+| Field           | Type             | Required | Constraints              | Notes                            |
+|-----------------|------------------|----------|--------------------------|----------------------------------|
+| id              | Long             | yes      | BIGSERIAL, PK            | Internal only, never exposed     |
+| eventToken      | UUID             | yes      | UNIQUE, NOT NULL         | Public identifier in URLs        |
+| organizerToken  | UUID             | yes      | UNIQUE, NOT NULL         | Secret, never in public API      |
+| title           | String           | yes      | 1–200 chars              |                                  |
+| description     | String           | no       | max 2000 chars           |                                  |
+| dateTime        | OffsetDateTime   | yes      |                          | Organizer's original offset      |
+| timezone        | String           | yes      | IANA zone ID, max 64     | **NEW** — e.g. "Europe/Berlin"   |
+| location        | String           | no       | max 500 chars            |                                  |
+| expiryDate      | LocalDate        | yes      | Must be future at create | Auto-deletion trigger            |
+| createdAt       | OffsetDateTime   | yes      | Server-generated         |                                  |
+
+**Validation rules**:
+- `timezone` must be a valid IANA zone ID (`ZoneId.getAvailableZoneIds()`).
+- `expiryDate` must be in the future at creation time (existing rule).
+
+**State transitions**:
+- Active → Expired: when `expiryDate < today` (computed, not stored).
+- Active → Cancelled: future (US-18), adds `cancelledAt` + `cancellationMessage`.
+
+### RSVP (future — not created in this feature)
+
+Documented here for context only. Created when the RSVP feature (US-8+) is implemented.
+
+| Field      | Type    | Required | Constraints                  |
+|------------|---------|----------|------------------------------|
+| id         | Long    | yes      | BIGSERIAL, PK                |
+| eventId    | Long    | yes      | FK → events.id               |
+| guestName  | String  | yes      | 1–100 chars                  |
+| attending  | Boolean | yes      | true = attending             |
+| createdAt  | OffsetDateTime | yes | Server-generated           |
+
+## Relationships
+
+```
+Event 1 ←── * RSVP (future)
+```
+
+## Type Mapping (full stack)
+
+| Concept      | Java              | PostgreSQL    | OpenAPI             | TypeScript |
+|--------------|-------------------|---------------|---------------------|------------|
+| Event time   | `OffsetDateTime`  | `timestamptz` | `string` `date-time`| `string`   |
+| Timezone     | `String`          | `varchar(64)` | `string`            | `string`   |
+| Expiry date  | `LocalDate`       | `date`        | `string` `date`     | `string`   |
+| Token        | `UUID`            | `uuid`        | `string` `uuid`     | `string`   |
+| Count        | `int`             | `integer`     | `integer`           | `number`   |

specs/007-view-event/plan.md

@@ -0,0 +1,89 @@
+# Implementation Plan: View Event Landing Page
+
+**Branch**: `007-view-event` | **Date**: 2026-03-06 | **Spec**: [spec.md](spec.md)
+**Input**: Feature specification from `/specs/007-view-event/spec.md`
+
+## Summary
+
+Add a public event detail page at `/events/:token` that displays event information (title, date/time with IANA timezone, description, location, attendee count) without requiring authentication. The page handles four states: loaded, expired ("event has ended"), not found (404), and server error (retry button). Loading uses skeleton-shimmer placeholders. Backend adds `GET /events/{token}` endpoint and a `timezone` field to the Event model (cross-cutting change to US-1).
+
+## Technical Context
+
+**Language/Version**: Java 25 (backend), TypeScript 5.9 (frontend)
+**Primary Dependencies**: Spring Boot 3.5.x, Vue 3, Vue Router 5, openapi-fetch, openapi-typescript
+**Storage**: PostgreSQL (JPA via Spring Data, Liquibase migrations)
+**Testing**: JUnit (backend), Vitest (frontend unit), Playwright + MSW (frontend E2E)
+**Target Platform**: Self-hosted web application (Docker)
+**Project Type**: Web service + SPA
+**Performance Goals**: N/A (single-user scale, self-hosted)
+**Constraints**: No external resources (CDNs, fonts, tracking), WCAG AA, privacy-first
+**Scale/Scope**: Single new view + one new API endpoint + one cross-cutting model change
+
+## Constitution Check
+
+*GATE: Must pass before Phase 0 research. Re-check after Phase 1 design.*
+
+| Principle | Status | Notes |
+|-----------|--------|-------|
+| I. Privacy by Design | PASS | No PII exposed. Only attendee count shown (not names). No external resources. No tracking. |
+| II. Test-Driven Methodology | PASS | TDD enforced: backend unit tests, frontend unit tests, E2E tests per spec. |
+| III. API-First Development | PASS | OpenAPI spec updated first. Types generated. Response schemas include `example:` fields. |
+| IV. Simplicity & Quality | PASS | Minimal changes: one GET endpoint, one new view, one model field. `attendeeCount` returns 0 (no RSVP stub). Cancelled state deferred. |
+| V. Dependency Discipline | PASS | No new dependencies. Skeleton shimmer is CSS-only. |
+| VI. Accessibility | PASS | Semantic HTML, ARIA attributes, keyboard navigable, WCAG AA contrast via design system. |
+
+**Post-Phase-1 re-check**: All gates still pass. The `timezone` field addition is a justified cross-cutting change documented in research.md R-1.
+
+## Project Structure
+
+### Documentation (this feature)
+
+```text
+specs/007-view-event/
+├── plan.md              # This file
+├── spec.md              # Feature specification
+├── research.md          # Phase 0: research decisions
+├── data-model.md        # Phase 1: entity definitions
+├── quickstart.md        # Phase 1: implementation overview
+├── contracts/
+│   └── get-event.yaml   # Phase 1: GET endpoint contract
+└── tasks.md             # Phase 2: implementation tasks (via /speckit.tasks)
+```
+
+### Source Code (repository root)
+
+```text
+backend/
+├── src/main/java/de/fete/
+│   ├── domain/
+│   │   ├── model/Event.java                          # Add timezone field
+│   │   └── port/in/GetEventUseCase.java              # NEW: inbound port
+│   ├── application/service/EventService.java          # Implement GetEventUseCase
+│   ├── adapter/
+│   │   ├── in/web/EventController.java               # Implement getEvent()
+│   │   └── out/persistence/
+│   │       ├── EventJpaEntity.java                    # Add timezone column
+│   │       └── EventPersistenceAdapter.java           # Map timezone field
+│   └── config/
+├── src/main/resources/
+│   ├── openapi/api.yaml                               # Add GET endpoint + timezone
+│   └── db/changelog/                                  # Liquibase: add timezone column
+└── src/test/java/de/fete/                             # Unit + integration tests
+
+frontend/
+├── src/
+│   ├── api/schema.d.ts                                # Regenerated from OpenAPI
+│   ├── views/EventDetailView.vue                      # NEW: event detail page
+│   ├── views/EventCreateView.vue                      # Add timezone to create request
+│   ├── router/index.ts                                # Point /events/:token to EventDetailView
+│   └── assets/main.css                                # Skeleton shimmer styles
+├── e2e/
+│   └── event-view.spec.ts                             # NEW: E2E tests for view event
+└── src/__tests__/                                     # Unit tests for EventDetailView
+```
+
+**Structure Decision**: Existing web application structure (backend + frontend). No new packages or modules — extends existing hexagonal architecture with one new inbound port and one new frontend view.
+
+## Complexity Tracking
+
+No constitution violations. No entries needed.

specs/007-view-event/quickstart.md

@@ -0,0 +1,39 @@
+# Quickstart: View Event Landing Page (007)
+
+## What this feature does
+
+Adds a public event detail page at `/events/:token`. Guests open a shared link and see:
+- Event title, date/time (with IANA timezone), description, location
+- Count of confirmed attendees (no names)
+- "Event has ended" state for expired events
+- "Event not found" for invalid tokens
+- Skeleton shimmer while loading
+
+## Prerequisites
+
+- US-1 (Create Event) is implemented — Event entity, JPA persistence, POST endpoint exist.
+- No RSVP model yet — attendee count returns 0 until RSVP feature is built.
+
+## Key changes
+
+### Backend
+
+1. **OpenAPI**: Add `GET /events/{token}` endpoint + `GetEventResponse` schema. Add `timezone` field to `CreateEventRequest`, `CreateEventResponse`, and `GetEventResponse`.
+2. **Domain**: Add `timezone` (String) to `Event.java`.
+3. **Persistence**: Add `timezone` column to `EventJpaEntity`, Liquibase migration.
+4. **Use case**: New `GetEventUseCase` (inbound port) + implementation in `EventService`.
+5. **Controller**: `EventController` implements `getEvent()` — maps to `GetEventResponse`, computes `expired` and `attendeeCount`.
+
+### Frontend
+
+1. **API types**: Regenerate `schema.d.ts` from updated OpenAPI spec.
+2. **EventDetailView.vue**: New view component — fetches event by token, renders detail card.
+3. **Router**: Replace `EventStubView` import at `/events/:token` with `EventDetailView`.
+4. **States**: Loading (skeleton shimmer), loaded, expired, not-found, server-error (retry button).
+5. **Create form**: Send `timezone` field (auto-detected via `Intl.DateTimeFormat`).
+
+### Testing
+
+- Backend: Unit tests for `GetEventUseCase`, controller tests for GET endpoint (200, 404).
+- Frontend: Unit tests for EventDetailView (all states).
+- E2E: Playwright tests with MSW mocks for all states (loaded, expired, not-found, error).

specs/007-view-event/research.md

@@ -0,0 +1,100 @@
+# Research: View Event Landing Page (007)
+
+**Date**: 2026-03-06 | **Status**: Complete
+
+## R-1: Timezone Field (Cross-Cutting)
+
+**Decision**: Add `timezone` String field (IANA zone ID) to Event entity, JPA entity, and OpenAPI schemas (both Create and Get).
+
+**Rationale**: The spec requires displaying the IANA timezone name (e.g. "Europe/Berlin") alongside the event time. `OffsetDateTime` preserves the offset (e.g. `+01:00`) but loses the IANA zone name. Since Europe/Berlin and Africa/Lagos both use `+01:00`, the zone name must be stored separately.
+
+**Alternatives considered**:
+- Store `ZonedDateTime` instead of `OffsetDateTime` — rejected because `OffsetDateTime` is already the established type in the stack (see `datetime-best-practices.md`), and `ZonedDateTime` serialization is non-standard in JSON/OpenAPI.
+- Derive timezone from offset — rejected because offset-to-zone mapping is ambiguous.
+
+**Impact on US-1 (Create Event)**:
+- `CreateEventRequest` gains a required `timezone` field (string, IANA zone ID).
+- `CreateEventResponse` gains a `timezone` field.
+- Frontend auto-detects via `Intl.DateTimeFormat().resolvedOptions().timeZone`.
+- Backend validates against `java.time.ZoneId.getAvailableZoneIds()`.
+- JPA: new `VARCHAR(64)` column `timezone` on `events` table.
+- Liquibase changeset: add `timezone` column. Existing events without timezone get `UTC` as default (pre-launch, destructive migration acceptable).
+
+## R-2: GET Endpoint Design
+
+**Decision**: `GET /api/events/{token}` returns public event data. Uses the existing hexagonal architecture pattern.
+
+**Rationale**: Follows the established pattern from `POST /events`. The event token is the public identifier — no auth required.
+
+**Flow**:
+1. `EventController` implements generated `EventsApi.getEvent()`.
+2. New inbound port: `GetEventUseCase` with `getByEventToken(UUID): Optional<Event>`.
+3. `EventService` implements the use case, delegates to `EventRepository.findByEventToken()` (already exists).
+4. Controller maps domain `Event` to `GetEventResponse` DTO.
+5. 404 returns `ProblemDetail` (RFC 9457) — no event data leaked.
+
+**Alternatives considered**:
+- Separate `/event/{token}` path (singular) — rejected because OpenAPI groups by resource; `/events/{token}` is RESTful convention.
+- Note: Frontend route is `/event/:token` (spec clarification), but API path is `/api/events/{token}`. These are independent.
+
+## R-3: Attendee Count Without RSVP Model
+
+**Decision**: Include `attendeeCount` (integer) in the `GetEventResponse`. Return `0` until the RSVP feature (US-8+) is implemented.
+
+**Rationale**: FR-001 requires attendee count display. The API contract should be stable from the start — consumers should not need to change when RSVP is added later. Returning `0` is correct (no RSVPs exist yet).
+
+**Future hook**: When RSVP is implemented, `EventService` or a dedicated query will `COUNT(*) WHERE event_id = ? AND status = 'ATTENDING'`.
+
+**Alternatives considered**:
+- Omit `attendeeCount` until RSVP exists — rejected because it would require API consumers to handle the field's absence, then handle its presence later. Breaking change.
+- Add a stub RSVP table now — rejected (YAGNI, violates Principle IV).
+
+## R-4: Expired Event Detection
+
+**Decision**: Server-side. The `GetEventResponse` includes a boolean `expired` field, computed by comparing `expiryDate` with the server's current date.
+
+**Rationale**: Server is the source of truth for time. Client clocks may be wrong. The frontend uses this flag to toggle the "event has ended" state.
+
+**Computation**: `event.getExpiryDate().isBefore(LocalDate.now(clock))` — uses the injected `Clock` bean (already exists for testability in `EventService`).
+
+**Alternatives considered**:
+- Client-side comparison — rejected because client clock may differ from server, leading to inconsistent behavior.
+- Separate endpoint for status — rejected (over-engineering).
+
+## R-5: URL Pattern
+
+**Decision**: Frontend route stays at `/events/:token` (plural). API path is `/api/events/{token}`. Both use the plural RESTful convention consistently.
+
+**Rationale**: `/events/:token` is the standard REST resource pattern (collection + identifier). The existing router already uses this path. Consistency between frontend route and API resource name reduces cognitive overhead.
+
+**Impact**: No route change needed — the existing `/events/:token` route in the router is correct.
+
+## R-6: Skeleton Shimmer Loading State
+
+**Decision**: CSS-only shimmer animation using a gradient sweep. No additional dependencies.
+
+**Rationale**: The spec requires skeleton-shimmer placeholders during API loading. A CSS-only approach is lightweight and matches the dependency discipline principle.
+
+**Implementation pattern**:
+```css
+.skeleton {
+  background: linear-gradient(90deg, var(--color-card) 25%, #e0e0e0 50%, var(--color-card) 75%);
+  background-size: 200% 100%;
+  animation: shimmer 1.5s infinite;
+  border-radius: var(--radius-card);
+}
+@keyframes shimmer {
+  0% { background-position: 200% 0; }
+  100% { background-position: -200% 0; }
+}
+```
+
+Skeleton blocks match the approximate shape/size of the real content fields (title, date, location, etc.).
+
+## R-7: Cancelled Event State (Deferred)
+
+**Decision**: The `GetEventResponse` does NOT include cancellation fields yet. US-3 (view cancelled event) is explicitly deferred until US-18 (cancel event) is implemented.
+
+**Rationale**: Spec says "[Deferred until US-18 is implemented]". Adding unused fields violates Principle IV (KISS).
+
+**Future hook**: When US-18 lands, add `cancelled: boolean` and `cancellationMessage: string` to the response schema.

specs/007-view-event/spec.md

@@ -9,18 +9,18 @@
 
 ### User Story 1 - View event details as guest (Priority: P1)
 
-A guest receives a shared event link, opens it, and sees all relevant event information: title, description (if provided), date and time, location (if provided), and the list of confirmed attendees with a count.
+A guest receives a shared event link, opens it, and sees all relevant event information: title, description (if provided), date and time, location (if provided), and the count of confirmed attendees.
 
 **Why this priority**: Core value of the feature — without this, no other part of the event page is meaningful.
 
-**Independent Test**: Can be fully tested by navigating to a valid event URL and verifying all event fields are displayed correctly, including attendee list and count.
+**Independent Test**: Can be fully tested by navigating to a valid event URL and verifying all event fields are displayed correctly, including attendee count.
 
 **Acceptance Scenarios**:
 
 1. **Given** a valid event link, **When** a guest opens the URL, **Then** the page displays the event title, date and time, and attendee count.
 2. **Given** a valid event link for an event with optional fields set, **When** a guest opens the URL, **Then** the description and location are also displayed.
 3. **Given** a valid event link for an event with optional fields absent, **When** a guest opens the URL, **Then** only the required fields are shown — no placeholder text for missing optional fields.
-4. **Given** a valid event with RSVPs, **When** a guest opens the event page, **Then** the names of all confirmed attendees ("attending") are listed and a total count is shown.
+4. **Given** a valid event with RSVPs, **When** a guest opens the event page, **Then** only the total count of confirmed attendees is shown — individual names are NOT displayed to guests (names are only visible to the organizer via the organizer view).
 5. **Given** an event page, **When** it is rendered, **Then** no external resources (CDNs, fonts, tracking scripts) are loaded — all assets are served from the app's own domain.
 6. **Given** a guest with no account, **When** they open the event URL, **Then** the page loads without any login, account, or access code required.
 
@@ -70,9 +70,9 @@ A guest navigates to an event URL that no longer resolves — the event was dele
 
 ### Edge Cases
 
-- What happens when the event has no attendees yet? — Attendee list is empty; count shows 0.
+- What happens when the event has no attendees yet? — Count shows 0.
 - What happens when the event has been cancelled after US-18 is implemented? — Renders cancelled state with optional message; RSVP hidden. [Deferred]
-- What happens when the server is temporarily unavailable? — [NEEDS EXPANSION]
+- What happens when the server is temporarily unavailable? — The page displays a generic, friendly error message with a manual "Retry" button. No automatic retry.
 - How does the page behave when JavaScript is disabled? — Per Q-3 resolution: the app is a SPA; JavaScript-dependent rendering is acceptable.
 
 ## Requirements
@@ -81,7 +81,7 @@ A guest navigates to an event URL that no longer resolves — the event was dele
 
 - **FR-001**: The event page MUST display: title, date and time, and attendee count for any valid event.
 - **FR-002**: The event page MUST display description and location when those optional fields are set on the event.
-- **FR-003**: The event page MUST list the names of all confirmed attendees (those who RSVPed "attending").
+- **FR-003**: The public event page MUST display only the count of confirmed attendees. Individual attendee names MUST NOT be shown to guests — names are only visible to the organizer (organizer view, separate user story).
 - **FR-004**: If the event's expiry date has passed, the page MUST render a clear "this event has ended" state and MUST NOT show any RSVP actions.
 - **FR-005**: If the event has been cancelled (US-18), the page MUST display a "cancelled" state with the cancellation message (if provided) and MUST NOT show any RSVP actions. [Deferred until US-18 is implemented]
 - **FR-006**: If the event token does not match any event on the server, the page MUST display a clear "event not found" message — no partial data or error traces.
@@ -90,15 +90,29 @@ A guest navigates to an event URL that no longer resolves — the event was dele
 
 ### Key Entities
 
-- **Event**: Has a public event token (UUID in URL), title, optional description, date/time, optional location, expiry date, and optionally a cancelled state with message.
-- **RSVP**: Has a guest name and attending status; confirmed attendees (status = attending) are listed on the public event page.
+- **Event**: Has a public event token (UUID in URL), title, optional description, date/time (OffsetDateTime — displayed in the organizer's original timezone, no conversion to viewer timezone), IANA timezone name (e.g. `Europe/Berlin`, stored as separate field — required for human-readable timezone display), optional location, expiry date (LocalDate), and optionally a cancelled state with message. See `.specify/memory/research/datetime-best-practices.md` for full stack type mapping.
+  - **Note**: The IANA timezone requires a new `timezone` field on the Event entity and API schema. This impacts US-1 (Create Event) — the frontend must send the organizer's IANA zone ID alongside the OffsetDateTime.
+- **RSVP**: Has a guest name and binary attending status (attending / not attending — no "maybe"). Only the count of confirmed attendees (status = attending) is exposed on the public event page. Individual names are visible only in the organizer view, sorted alphabetically by name.
 
 ## Success Criteria
 
 ### Measurable Outcomes
 
 - **SC-001**: A guest who opens a valid event URL can see all set event fields (title, date/time, and any optional fields) without logging in.
-- **SC-002**: The attendee list and count reflect all current server-side RSVPs with attending status.
+- **SC-002**: The attendee count reflects all current server-side RSVPs with attending status. No individual names are exposed on the public event page.
 - **SC-003**: An expired event URL renders the "ended" state — RSVP controls are absent from the DOM, not merely hidden via CSS.
 - **SC-004**: An unknown event token URL renders a "not found" message — no event data, no server error details.
 - **SC-005**: No network requests to external domains are made when loading the event page.
+
+## Clarifications
+
+### Session 2026-03-06
+
+- Q: What should the event page display when the server is temporarily unavailable? → A: Generic friendly error state with a manual "Retry" button; no automatic retry.
+- Q: How should date/time be displayed regarding timezones? → A: Organizer timezone preserved — display the time exactly as entered by the organizer (OffsetDateTime), no conversion to viewer's local timezone. The IANA timezone name (e.g. "Europe/Berlin") MUST be displayed alongside the time. Requires a new `timezone` field on Event entity/API (impacts US-1).
+- Q: What is the URL pattern for event pages? → A: `/events/:token` (e.g. `/events/a1b2c3d4-...`). Plural, matching the RESTful API resource name.
+- Q: Should guest names be visible to other guests on the public event page? → A: No. Only the attendee count is shown to guests. Individual names are exclusively visible to the organizer, sorted alphabetically.
+- Q: How should the loading state look while the API call is in progress? → A: Skeleton-shimmer (placeholder blocks in field shape that shimmer until data arrives).
+- Q: Should the event page include OpenGraph meta tags for link previews? → A: Out of scope for US-007. Separate user story — generic app-branding OG-tags only, no event data exposed to crawlers. Noted in `.specify/memory/ideen.md`.
+- Q: Should date/time formatting adapt to the viewer's browser locale? → A: Yes, browser-locale-based via `Intl.DateTimeFormat` (e.g. DE: "15. März 2026, 20:00" / EN: "March 15, 2026, 8:00 PM").
+- Q: Is RSVP status binary or are there more states (e.g. "maybe")? → A: Binary — attending or not attending. No "maybe" status. Count reflects only confirmed attendees.

specs/007-view-event/tasks.md

@@ -0,0 +1,225 @@
+# Tasks: View Event Landing Page
+
+**Input**: Design documents from `/specs/007-view-event/`
+**Prerequisites**: plan.md, spec.md, research.md, data-model.md, contracts/get-event.yaml
+
+**Tests**: Included — constitution enforces Test-Driven Methodology (Principle II).
+
+**Organization**: Tasks grouped by user story. US3 (cancelled event) is deferred until US-18.
+
+## Format: `[ID] [P?] [Story] Description`
+
+- **[P]**: Can run in parallel (different files, no dependencies)
+- **[Story]**: Which user story this task belongs to (e.g., US1, US2, US4)
+- Exact file paths included in descriptions
+
+---
+
+## Phase 1: Setup (Cross-Cutting Schema Changes)
+
+**Purpose**: OpenAPI contract update, database migration, and type generation — prerequisites for all backend and frontend work.
+
+- [x] T001 Update OpenAPI spec: add `GET /events/{token}` endpoint, `GetEventResponse` schema, and `timezone` field to `CreateEventRequest`/`CreateEventResponse` in `backend/src/main/resources/openapi/api.yaml`
+- [x] T002 [P] Add Liquibase changeset: `timezone VARCHAR(64) NOT NULL DEFAULT 'UTC'` column on `events` table in `backend/src/main/resources/db/changelog/`
+- [x] T003 Regenerate frontend TypeScript types from updated OpenAPI spec in `frontend/src/api/schema.d.ts`
+
+**Checkpoint**: OpenAPI contract finalized, DB schema ready, frontend types available.
+
+---
+
+## Phase 2: Foundational (Backend — Blocks All User Stories)
+
+**Purpose**: Domain model update, new GET use case, controller endpoint, and backend tests. All user stories depend on this.
+
+**CRITICAL**: No frontend user story work can begin until this phase is complete.
+
+### Backend Tests (TDD — write first, verify they fail)
+
+- [x] T004 [P] Backend unit tests for `GetEventUseCase`: test getByEventToken returns event, returns empty for unknown token, computes expired flag — in `backend/src/test/java/de/fete/`
+- [x] T005 [P] Backend controller tests for `GET /events/{token}`: test 200 with full response, 200 with optional fields absent, 404 with ProblemDetail — in `backend/src/test/java/de/fete/`
+- [x] T006 [P] Backend tests for timezone in Create Event flow: request validation (valid/invalid IANA zone), persistence round-trip — in `backend/src/test/java/de/fete/`
+
+### Backend Implementation
+
+- [x] T007 Add `timezone` field (String) to domain model in `backend/src/main/java/de/fete/domain/model/Event.java`
+- [x] T008 [P] Add `timezone` column to JPA entity and update persistence mapping in `backend/src/main/java/de/fete/adapter/out/persistence/EventJpaEntity.java` and `EventPersistenceAdapter.java`
+- [x] T009 [P] Update Create Event flow to accept and validate `timezone` (must be valid IANA zone ID via `ZoneId.getAvailableZoneIds()`) in `backend/src/main/java/de/fete/application/service/EventService.java` and `EventController.java`
+- [x] T010 Create `GetEventUseCase` inbound port with `getByEventToken(UUID): Optional<Event>` in `backend/src/main/java/de/fete/domain/port/in/GetEventUseCase.java`
+- [x] T011 Implement `GetEventUseCase` in `backend/src/main/java/de/fete/application/service/EventService.java` — delegates to existing `findByEventToken()` repository method
+- [x] T012 Implement `getEvent()` in `backend/src/main/java/de/fete/adapter/in/web/EventController.java` — maps domain Event to GetEventResponse, computes `expired` (expiryDate vs server clock) and `attendeeCount` (hardcoded 0)
+
+**Checkpoint**: Backend complete — `GET /api/events/{token}` returns 200 or 404. All backend tests pass.
+
+---
+
+## Phase 3: User Story 1 — View Event Details as Guest (Priority: P1) MVP
+
+**Goal**: A guest opens a shared event link and sees all event information: title, date/time with IANA timezone, description, location, attendee count. Loading shows skeleton shimmer.
+
+**Independent Test**: Navigate to a valid event URL, verify all fields display correctly with locale-formatted date/time.
+
+### Tests for User Story 1
+
+- [x] T013 [P] [US1] Unit tests for EventDetailView loaded state: renders title, date/time (locale-formatted via `Intl.DateTimeFormat`), timezone, description, location, attendee count — in `frontend/src/__tests__/EventDetailView.spec.ts`
+- [x] T014 [P] [US1] Unit test for EventDetailView loading state: renders skeleton shimmer placeholders — in `frontend/src/__tests__/EventDetailView.spec.ts`
+
+### Implementation for User Story 1
+
+- [x] T015 [P] [US1] Add skeleton shimmer CSS (CSS-only gradient animation, no dependencies) in `frontend/src/assets/main.css`
+- [x] T016 [US1] Create `EventDetailView.vue` with loading (skeleton shimmer) and loaded states — fetches event via `openapi-fetch` GET `/events/{token}`, formats date/time with `Intl.DateTimeFormat` using browser locale — in `frontend/src/views/EventDetailView.vue`
+- [x] T017 [US1] Update router to use `EventDetailView` for `/events/:token` route in `frontend/src/router/index.ts`
+- [x] T018 [P] [US1] Update `EventCreateView.vue` to send `timezone` field (auto-detected via `Intl.DateTimeFormat().resolvedOptions().timeZone`) in `frontend/src/views/EventCreateView.vue`
+- [x] T019 [US1] E2E test for loaded event: navigate to valid event URL, verify all fields displayed, verify no external resource requests — in `frontend/e2e/event-view.spec.ts`
+
+**Checkpoint**: US1 complete — guest can view event details. Skeleton shimmer during loading. Date/time locale-formatted with timezone label.
+
+---
+
+## Phase 4: User Story 2 — View Expired Event (Priority: P2)
+
+**Goal**: A guest opens a link to an expired event. The page shows event details plus a clear "event has ended" indicator. No RSVP actions shown.
+
+**Independent Test**: Create an event with past expiry date, navigate to its URL, verify "event has ended" state renders and no RSVP controls are present.
+
+**Dependencies**: Requires Phase 3 (EventDetailView exists).
+
+### Tests for User Story 2
+
+- [x] T020 [P] [US2] Unit test for EventDetailView expired state: renders "event has ended" indicator, RSVP controls absent from DOM — in `frontend/src/__tests__/EventDetailView.spec.ts`
+
+### Implementation for User Story 2
+
+- [x] T021 [US2] Add expired state rendering to `EventDetailView.vue`: show event details + "event has ended" banner when `expired === true`, no RSVP actions in DOM — in `frontend/src/views/EventDetailView.vue`
+- [x] T022 [US2] E2E test for expired event: MSW returns event with `expired: true`, verify banner and absent RSVP controls — in `frontend/e2e/event-view.spec.ts`
+
+**Checkpoint**: US2 complete — expired events clearly show "ended" state.
+
+---
+
+## Phase 5: User Story 4 — Event Not Found (Priority: P2)
+
+**Goal**: A guest navigates to an invalid event URL. The page shows a clear "event not found" message — no partial data, no error traces.
+
+**Independent Test**: Navigate to a URL with an unknown event token, verify "event not found" message renders.
+
+**Dependencies**: Requires Phase 3 (EventDetailView exists). No dependency on US2.
+
+### Tests for User Story 4
+
+- [x] T023 [P] [US4] Unit test for EventDetailView not-found state: renders "event not found" message, no event data in DOM — in `frontend/src/__tests__/EventDetailView.spec.ts`
+
+### Implementation for User Story 4
+
+- [x] T024 [US4] Add not-found state rendering to `EventDetailView.vue`: show "event not found" message when API returns 404 — in `frontend/src/views/EventDetailView.vue`
+- [x] T025 [US4] E2E test for event not found: MSW returns 404 ProblemDetail, verify message and no event data — in `frontend/e2e/event-view.spec.ts`
+
+**Checkpoint**: US4 complete — invalid tokens show friendly not-found message.
+
+---
+
+## Phase 6: Polish & Cross-Cutting Concerns
+
+**Purpose**: Server error edge case, final validation, and cleanup.
+
+- [x] T026 Add server error state with manual retry button to `EventDetailView.vue`: friendly error message + "Retry" button that re-fetches — in `frontend/src/views/EventDetailView.vue`
+- [x] T027 [P] Unit test for server error + retry state in `frontend/src/__tests__/EventDetailView.spec.ts`
+- [x] T028 [P] E2E test for server error: MSW returns 500, verify error message and retry button functionality — in `frontend/e2e/event-view.spec.ts`
+- [x] T029 Run quickstart.md validation: verify all key changes listed in quickstart.md are implemented
+
+---
+
+## Dependencies & Execution Order
+
+### Phase Dependencies
+
+- **Setup (Phase 1)**: No dependencies — start immediately
+- **Foundational (Phase 2)**: Depends on T001 (OpenAPI spec) and T002 (migration) from Setup
+- **US1 (Phase 3)**: Depends on Phase 2 completion (backend endpoint must exist)
+- **US2 (Phase 4)**: Depends on Phase 3 (EventDetailView exists) — can parallelize with US4
+- **US4 (Phase 5)**: Depends on Phase 3 (EventDetailView exists) — can parallelize with US2
+- **Polish (Phase 6)**: Depends on Phase 3 minimum; ideally after US2 + US4
+
+### User Story Dependencies
+
+```
+Phase 1 (Setup) ──► Phase 2 (Backend) ──► Phase 3 (US1/MVP)
+                                               │
+                                          ┌────┴────┐
+                                          ▼         ▼
+                                     Phase 4     Phase 5
+                                     (US2)       (US4)
+                                          └────┬────┘
+                                               ▼
+                                          Phase 6 (Polish)
+```
+
+- **US1 (P1)**: Requires Phase 2 — no dependency on other stories
+- **US2 (P2)**: Requires US1 (same component) — no dependency on US4
+- **US4 (P2)**: Requires US1 (same component) — no dependency on US2
+- **US3 (P2)**: DEFERRED until US-18 (cancel event) is implemented
+
+### Within Each Phase
+
+- Tests MUST be written and FAIL before implementation (TDD)
+- Models/ports before services
+- Services before controllers
+- Backend before frontend (for the same endpoint)
+
+### Parallel Opportunities
+
+**Phase 1**: T002 (migration) can run in parallel with T001 (OpenAPI update)
+**Phase 2**: T004, T005, T006 (tests) can run in parallel. T008, T009 can run in parallel after T007.
+**Phase 3**: T013, T014 (unit tests) and T015 (CSS) can run in parallel. T018 (create form timezone) is independent.
+**Phase 4 + 5**: US2 and US4 can be implemented in parallel (different UI states, same file but non-conflicting sections).
+
+---
+
+## Parallel Example: Phase 2 (Backend)
+
+```bash
+# Write all backend tests in parallel (TDD):
+Task T004: "Unit tests for GetEventUseCase"
+Task T005: "Controller tests for GET /events/{token}"
+Task T006: "Tests for timezone in Create Event flow"
+
+# Then implement in parallel where possible:
+Task T008: "Add timezone to JPA entity + persistence"  # parallel
+Task T009: "Update Create Event flow for timezone"      # parallel
+# T010-T012 are sequential (port → service → controller)
+```
+
+---
+
+## Implementation Strategy
+
+### MVP First (User Story 1 Only)
+
+1. Complete Phase 1: Setup (OpenAPI + migration + types)
+2. Complete Phase 2: Backend (domain + use case + controller + tests)
+3. Complete Phase 3: US1 (EventDetailView + router + tests)
+4. **STOP and VALIDATE**: Guest can view event details via shared link
+5. Deploy/demo if ready
+
+### Incremental Delivery
+
+1. Setup + Backend → Backend ready, API testable via curl
+2. Add US1 → Guest can view events (MVP!)
+3. Add US2 → Expired events show "ended" state
+4. Add US4 → Invalid tokens show "not found"
+5. Polish → Server error handling, final validation
+
+### Deferred Work
+
+- **US3 (Cancelled event)**: Blocked on US-18. No tasks generated. Will require adding `cancelled` + `cancellationMessage` to GetEventResponse and a new UI state.
+
+---
+
+## Notes
+
+- [P] tasks = different files, no dependencies on incomplete tasks
+- [Story] label maps task to specific user story for traceability
+- `attendeeCount` returns 0 until RSVP feature (US-8+) is implemented (R-3)
+- `expired` is computed server-side using injected Clock bean (R-4)
+- Frontend route: `/events/:token` — API path: `/api/events/{token}` (R-5)
+- Skeleton shimmer is CSS-only, no additional dependencies (R-6)
+- Date/time formatted via `Intl.DateTimeFormat` with browser locale (spec clarification Q7)

specs/008-rsvp/contracts/create-rsvp.yaml

@@ -0,0 +1,79 @@
+# OpenAPI contract addition for POST /events/{eventToken}/rsvps
+# To be merged into backend/src/main/resources/openapi/api.yaml
+
+paths:
+  /events/{eventToken}/rsvps:
+    post:
+      operationId: createRsvp
+      summary: Submit an RSVP for an event
+      tags:
+        - events
+      parameters:
+        - name: eventToken
+          in: path
+          required: true
+          schema:
+            type: string
+            format: uuid
+          description: Public event token
+      requestBody:
+        required: true
+        content:
+          application/json:
+            schema:
+              $ref: "#/components/schemas/CreateRsvpRequest"
+      responses:
+        "201":
+          description: RSVP created successfully
+          content:
+            application/json:
+              schema:
+                $ref: "#/components/schemas/CreateRsvpResponse"
+        "400":
+          description: Validation failed (e.g. blank name)
+          content:
+            application/problem+json:
+              schema:
+                $ref: "#/components/schemas/ValidationProblemDetail"
+        "404":
+          description: Event not found
+          content:
+            application/problem+json:
+              schema:
+                $ref: "#/components/schemas/ProblemDetail"
+        "409":
+          description: Event has expired — RSVPs no longer accepted
+          content:
+            application/problem+json:
+              schema:
+                $ref: "#/components/schemas/ProblemDetail"
+
+components:
+  schemas:
+    CreateRsvpRequest:
+      type: object
+      required:
+        - name
+      properties:
+        name:
+          type: string
+          minLength: 1
+          maxLength: 100
+          description: Guest's display name
+          example: "Max Mustermann"
+
+    CreateRsvpResponse:
+      type: object
+      required:
+        - rsvpToken
+        - name
+      properties:
+        rsvpToken:
+          type: string
+          format: uuid
+          description: Token identifying this RSVP (store client-side for future updates)
+          example: "d4e5f6a7-b8c9-0123-4567-890abcdef012"
+        name:
+          type: string
+          description: Guest's display name as stored
+          example: "Max Mustermann"

specs/008-rsvp/data-model.md

@@ -0,0 +1,93 @@
+# Data Model: RSVP to an Event (008)
+
+**Date**: 2026-03-06
+
+## Entities
+
+### Rsvp (NEW)
+
+| Field      | Type           | Required | Constraints                    | Notes                              |
+|------------|----------------|----------|--------------------------------|------------------------------------|
+| id         | Long           | yes      | BIGSERIAL, PK                  | Internal only, never exposed       |
+| rsvpToken  | RsvpToken      | yes      | UNIQUE, NOT NULL               | Server-generated UUID, returned to client |
+| eventId    | Long           | yes      | FK -> events.id, NOT NULL      | Which event this RSVP belongs to   |
+| name       | String         | yes      | 1-100 chars, NOT NULL          | Guest's display name               |
+
+**Notes**:
+- No `attending` boolean — existence of an entry implies attendance (per spec).
+- No `createdAt` — not required by the spec. Can be added later if needed (e.g. for guest list sorting in 009).
+- Duplicates from different devices or cleared localStorage are accepted (privacy trade-off).
+
+### Token Value Objects (NEW)
+
+| Record           | Field | Type | Notes                                         |
+|------------------|-------|------|-----------------------------------------------|
+| `EventToken`     | value | UUID | Immutable, non-null. Java record wrapping UUID |
+| `OrganizerToken` | value | UUID | Immutable, non-null. Java record wrapping UUID |
+| `RsvpToken`      | value | UUID | Immutable, non-null. Java record wrapping UUID |
+
+**Purpose**: Type-safe wrappers preventing mix-ups between the three token types at compile time. All generated server-side via `UUID.randomUUID()`. JPA entities continue to use raw `UUID` columns — mapping happens in the persistence adapters.
+
+### Event (MODIFIED — token fields change type)
+
+The Event domain model's `eventToken` and `organizerToken` fields change from raw `UUID` to their typed record wrappers. No database schema change — the JPA entity keeps raw `UUID` columns.
+
+| Field           | Old Type | New Type         |
+|-----------------|----------|------------------|
+| eventToken      | UUID     | EventToken       |
+| organizerToken  | UUID     | OrganizerToken   |
+
+The `attendeeCount` was already added to the API response in 007-view-event — it now gets populated from a count query instead of returning 0.
+
+### StoredEvent (frontend localStorage — modified)
+
+| Field          | Type   | Required | Notes                              |
+|----------------|--------|----------|------------------------------------|
+| eventToken     | string | yes      | Existing                           |
+| organizerToken | string | no       | Existing (organizer flow)          |
+| title          | string | yes      | Existing                           |
+| dateTime       | string | yes      | Existing                           |
+| expiryDate     | string | yes      | Existing                           |
+| rsvpToken      | string | no       | **NEW** — set after RSVP submission |
+| rsvpName       | string | no       | **NEW** — guest's submitted name    |
+
+## Validation Rules
+
+- `name`: required, 1-100 characters, trimmed. Blank or whitespace-only is rejected.
+- `rsvpToken`: server-generated, never from client input on create.
+- `eventId`: must reference an existing, non-expired event.
+
+## Relationships
+
+```
+Event 1 <---- * Rsvp
+  |               |
+  eventToken      rsvpToken (unique)
+  (public)        (returned to client)
+```
+
+## Type Mapping (full stack)
+
+| Concept      | Java              | PostgreSQL    | OpenAPI             | TypeScript |
+|--------------|-------------------|---------------|---------------------|------------|
+| RSVP ID      | `Long`            | `bigserial`   | N/A (not exposed)   | N/A        |
+| RSVP Token   | `RsvpToken`       | `uuid`        | `string` `uuid`     | `string`   |
+| Event FK     | `Long`            | `bigint`      | N/A (path param)    | N/A        |
+| Guest name   | `String`          | `varchar(100)`| `string`            | `string`   |
+| Attendee cnt | `long`            | `count(*)`    | `integer`           | `number`   |
+
+## Database Migration
+
+New Liquibase changeset `003-create-rsvps-table.xml`:
+
+```sql
+CREATE TABLE rsvps (
+    id          BIGSERIAL PRIMARY KEY,
+    rsvp_token  UUID NOT NULL UNIQUE,
+    event_id    BIGINT NOT NULL REFERENCES events(id),
+    name        VARCHAR(100) NOT NULL
+);
+
+CREATE INDEX idx_rsvps_event_id ON rsvps(event_id);
+CREATE INDEX idx_rsvps_rsvp_token ON rsvps(rsvp_token);
+```

specs/008-rsvp/plan.md

@@ -0,0 +1,114 @@
+# Implementation Plan: RSVP to an Event
+
+**Branch**: `008-rsvp` | **Date**: 2026-03-06 | **Spec**: [spec.md](spec.md)
+**Input**: Feature specification from `/specs/008-rsvp/spec.md`
+
+## Summary
+
+Add RSVP functionality to the event detail page. Backend: new `POST /api/events/{eventToken}/rsvps` endpoint that persists an RSVP (guest name) and returns an `rsvpToken`. Populates the existing `attendeeCount` field with real data from a count query. Rejects RSVPs on expired events (409). Frontend: fullscreen event presentation with sticky bottom bar (RSVP CTA or status), bottom sheet with RSVP form (name + submit). localStorage stores rsvpToken and name per event. No account required.
+
+## Technical Context
+
+**Language/Version**: Java 25 (backend), TypeScript 5.9 (frontend)
+**Primary Dependencies**: Spring Boot 3.5.x, Vue 3, Vue Router 5, openapi-fetch, openapi-typescript
+**Storage**: PostgreSQL (JPA via Spring Data, Liquibase migrations)
+**Testing**: JUnit (backend), Vitest (frontend unit), Playwright + MSW (frontend E2E)
+**Target Platform**: Self-hosted web application (Docker)
+**Project Type**: Web service + SPA
+**Performance Goals**: N/A (single-user scale, self-hosted)
+**Constraints**: No external resources (CDNs, fonts, tracking), WCAG AA, privacy-first, no PII logging
+**Scale/Scope**: New RSVP domain (model + service + controller + persistence), new frontend components (bottom sheet, sticky bar), modified event detail view
+
+## Constitution Check
+
+*GATE: Must pass before Phase 0 research. Re-check after Phase 1 design.*
+
+| Principle | Status | Notes |
+|-----------|--------|-------|
+| I. Privacy by Design | PASS | No PII logged. Only guest-entered name stored. No IP logging. No tracking. Attendee names not exposed publicly (count only). Unprotected endpoint is a conscious privacy trade-off per spec. |
+| II. Test-Driven Methodology | PASS | TDD enforced: backend unit + integration tests, frontend unit tests, E2E tests. Tests written before implementation. |
+| III. API-First Development | PASS | OpenAPI spec updated first. New endpoint + schemas with `example:` fields. Types generated before implementation. |
+| IV. Simplicity & Quality | PASS | Minimal scope: one POST endpoint, one domain entity, one bottom sheet component. No CAPTCHA, no rate limiting, no edit/withdraw (deferred). Cancelled event guard deferred to US-18. |
+| V. Dependency Discipline | PASS | No new dependencies. Bottom sheet is CSS + Vue (~50 lines). No UI library. |
+| VI. Accessibility | PASS | Bottom sheet uses dialog role + aria-modal. Focus trap. ESC to close. Keyboard navigable. WCAG AA contrast via design system. |
+
+**Post-Phase-1 re-check**: All gates still pass. Three token value objects (`EventToken`, `OrganizerToken`, `RsvpToken`) introduced uniformly — justified by spec requirement for type-safe tokens. Refactoring existing Event model to use typed tokens is a mechanical change well-covered by existing tests.
+
+## Project Structure
+
+### Documentation (this feature)
+
+```text
+specs/008-rsvp/
+├── plan.md              # This file
+├── spec.md              # Feature specification
+├── research.md          # Phase 0: research decisions (R-1 through R-8)
+├── data-model.md        # Phase 1: Rsvp entity, RsvpToken value object
+├── quickstart.md        # Phase 1: implementation overview
+├── contracts/
+│   └── create-rsvp.yaml # Phase 1: POST endpoint contract
+└── tasks.md             # Phase 2: implementation tasks (via /speckit.tasks)
+```
+
+### Source Code (repository root)
+
+```text
+backend/
+├── src/main/java/de/fete/
+│   ├── domain/
+│   │   ├── model/
+│   │   │   ├── Event.java                             # MODIFIED: UUID → EventToken/OrganizerToken
+│   │   │   ├── EventToken.java                        # NEW: typed token record
+│   │   │   ├── OrganizerToken.java                    # NEW: typed token record
+│   │   │   ├── Rsvp.java                              # NEW: RSVP domain entity
+│   │   │   └── RsvpToken.java                         # NEW: typed token record
+│   │   └── port/
+│   │       ├── in/CreateRsvpUseCase.java               # NEW: inbound port
+│   │       └── out/RsvpRepository.java                 # NEW: outbound port
+│   ├── application/service/
+│   │   ├── EventService.java                            # MODIFIED: use typed tokens
+│   │   └── RsvpService.java                             # NEW: RSVP business logic
+│   ├── adapter/
+│   │   ├── in/web/
+│   │   │   ├── EventController.java                    # MODIFIED: typed tokens + attendee count + createRsvp()
+│   │   │   └── GlobalExceptionHandler.java             # MODIFIED: handle EventExpiredException
+│   │   └── out/persistence/
+│   │       ├── EventPersistenceAdapter.java            # MODIFIED: map typed tokens
+│   │       ├── RsvpJpaEntity.java                      # NEW: JPA entity
+│   │       ├── RsvpJpaRepository.java                  # NEW: Spring Data interface
+│   │       └── RsvpPersistenceAdapter.java             # NEW: port implementation
+├── src/main/resources/
+│   ├── openapi/api.yaml                                 # MODIFIED: add RSVP endpoint + schemas
+│   └── db/changelog/
+│       ├── db.changelog-master.xml                      # MODIFIED: include 003
+│       └── 003-create-rsvps-table.xml                   # NEW: rsvps table
+└── src/test/java/de/fete/
+    ├── application/service/
+    │   ├── EventServiceTest.java                         # MODIFIED: use typed tokens
+    │   └── RsvpServiceTest.java                          # NEW: unit tests
+    └── adapter/in/web/
+        └── EventControllerIntegrationTest.java            # MODIFIED: typed tokens + RSVP integration tests
+
+frontend/
+├── src/
+│   ├── api/schema.d.ts                                  # REGENERATED from OpenAPI
+│   ├── components/
+│   │   ├── BottomSheet.vue                              # NEW: reusable bottom sheet
+│   │   └── RsvpBar.vue                                  # NEW: sticky bottom bar
+│   ├── views/EventDetailView.vue                        # MODIFIED: integrate RSVP bar + sheet
+│   ├── composables/useEventStorage.ts                   # MODIFIED: add rsvpToken/rsvpName
+│   └── assets/main.css                                  # MODIFIED: bottom sheet + bar styles
+├── src/views/__tests__/EventDetailView.spec.ts           # MODIFIED: RSVP integration tests
+├── src/components/__tests__/
+│   ├── BottomSheet.spec.ts                              # NEW: unit tests
+│   └── RsvpBar.spec.ts                                  # NEW: unit tests
+├── src/composables/__tests__/useEventStorage.spec.ts     # MODIFIED: test new fields
+└── e2e/
+    └── event-rsvp.spec.ts                               # NEW: E2E tests
+```
+
+**Structure Decision**: Extends the existing web application structure (backend + frontend). Adds a new RSVP domain following the same hexagonal architecture pattern established in 006-create-event and 007-view-event. Cross-cutting refactoring introduces typed token value objects (`EventToken`, `OrganizerToken`, `RsvpToken`) across all layers. Two new frontend components (`BottomSheet`, `RsvpBar`) are the first entries in `src/components/` — justified because they're reusable UI primitives, not view-specific markup.
+
+## Complexity Tracking
+
+No constitution violations. No entries needed.

specs/008-rsvp/quickstart.md

@@ -0,0 +1,58 @@
+# Quickstart: RSVP to an Event (008)
+
+## What this feature adds
+
+1. **Backend**: New `POST /api/events/{eventToken}/rsvps` endpoint that accepts an RSVP (guest name) and returns an `rsvpToken`. Populates the existing `attendeeCount` field in `GET /events/{token}` with real data.
+
+2. **Frontend**: Bottom sheet RSVP form on the event detail page. Sticky bottom bar with CTA (or status after RSVP). localStorage persistence of RSVP data.
+
+## Implementation order
+
+1. **Token value objects** — Create `EventToken`, `OrganizerToken`, `RsvpToken` records. Refactor `Event` domain model and all layers (service, controller, repository, persistence adapter, tests) to use typed tokens instead of raw UUID.
+2. **OpenAPI spec** — Add `CreateRsvpRequest`, `CreateRsvpResponse`, and the `POST /events/{eventToken}/rsvps` endpoint.
+3. **Liquibase migration** — Create `rsvps` table (003-create-rsvps-table.xml).
+4. **Domain model** — `Rsvp` entity using `RsvpToken`.
+5. **Ports** — `CreateRsvpUseCase` (in), `RsvpRepository` (out).
+6. **Persistence adapter** — `RsvpJpaEntity`, `RsvpJpaRepository`, `RsvpPersistenceAdapter`.
+7. **Service** — `RsvpService` implementing `CreateRsvpUseCase`.
+8. **Controller** — Add `createRsvp()` to `EventController`.
+9. **Attendee count** — Wire `RsvpRepository.countByEventId()` into the GET event flow.
+10. **Frontend composable** — Extend `useEventStorage` with `rsvpToken`/`rsvpName`.
+11. **Frontend UI** — Bottom sheet component, sticky bar, RSVP form.
+12. **E2E tests** — RSVP submission, expired event guard, localStorage verification.
+
+## Key files to touch
+
+### Backend (new)
+- `domain/model/EventToken.java`
+- `domain/model/OrganizerToken.java`
+- `domain/model/Rsvp.java`
+- `domain/model/RsvpToken.java`
+- `domain/port/in/CreateRsvpUseCase.java`
+- `domain/port/out/RsvpRepository.java`
+- `application/service/RsvpService.java`
+- `adapter/out/persistence/RsvpJpaEntity.java`
+- `adapter/out/persistence/RsvpJpaRepository.java`
+- `adapter/out/persistence/RsvpPersistenceAdapter.java`
+- `db/changelog/003-create-rsvps-table.xml`
+
+### Backend (modified)
+- `domain/model/Event.java` — UUID → EventToken/OrganizerToken
+- `application/service/EventService.java` — use typed tokens
+- `adapter/in/web/EventController.java` — typed tokens + wire attendee count + createRsvp()
+- `adapter/in/web/GlobalExceptionHandler.java` — handle `EventExpiredException` (409)
+- `adapter/out/persistence/EventPersistenceAdapter.java` — map typed tokens
+- `domain/port/out/EventRepository.java` — typed token in signature
+- `openapi/api.yaml` — new endpoint + schemas
+- `db/changelog/db.changelog-master.xml` — include new migration
+- All existing tests — update to use typed tokens
+
+### Frontend (new)
+- `src/components/BottomSheet.vue` — reusable bottom sheet
+- `src/components/RsvpBar.vue` — sticky bottom bar (CTA or status)
+- `e2e/event-rsvp.spec.ts` — E2E tests
+
+### Frontend (modified)
+- `src/views/EventDetailView.vue` — integrate RSVP bar + bottom sheet
+- `src/composables/useEventStorage.ts` — add rsvpToken/rsvpName fields
+- `src/api/schema.d.ts` — regenerated from OpenAPI

specs/008-rsvp/research.md

@@ -0,0 +1,157 @@
+# Research: RSVP to an Event (008)
+
+**Date**: 2026-03-06 | **Status**: Complete
+
+## R-1: RSVP Endpoint Design
+
+**Decision**: `POST /api/events/{eventToken}/rsvps` creates an RSVP. Returns `201` with `rsvpToken` on success. Rejects with `409 Conflict` if event expired.
+
+**Rationale**: RSVPs are a sub-resource of events — nesting under the event token is RESTful and groups operations logically. The event token in the path identifies the event; no separate event ID in the request body needed.
+
+**Flow**:
+1. `EventController` implements generated `EventsApi.createRsvp()` — same controller, same tag, sub-resource of events.
+2. Controller resolves the event via `eventToken`, checks expiry.
+3. New inbound port: `CreateRsvpUseCase` with `createRsvp(CreateRsvpCommand): Rsvp`.
+4. `RsvpService` validates event exists + not expired, persists RSVP, returns domain model.
+5. Controller maps to `CreateRsvpResponse` DTO (contains `rsvpToken`).
+6. 404 if event not found, 409 if event expired, 400 for validation errors.
+
+**Alternatives considered**:
+- `POST /api/rsvps` with eventToken in body — rejected because RSVPs are always scoped to an event. Nested resource is cleaner.
+- Separate `RsvpController` — rejected because the URL is under `/events/`, so it belongs in `EventController`. One controller per resource root (KISS).
+- `PUT` instead of `POST` — rejected because the client doesn't know the rsvpToken before creation.
+
+## R-2: Token Value Objects
+
+**Decision**: Introduce all three token types as Java records wrapping `UUID`: `EventToken`, `OrganizerToken`, and `RsvpToken`. Refactor the existing `Event` domain model and all layers (service, controller, repository, persistence adapter) to use the typed tokens instead of raw `UUID`.
+
+**Rationale**: The spec mandates typed token records. Introducing `RsvpToken` alone while leaving the other two as raw UUIDs would create an inconsistency in the domain model. All three tokens serve the same purpose (type-safe identification) and should be modeled uniformly. The cross-cutting refactoring touches existing code but is mechanical and well-covered by existing tests.
+
+**Implementation pattern** (same for all three):
+```java
+package de.fete.domain.model;
+
+public record EventToken(UUID value) {
+    public EventToken {
+        Objects.requireNonNull(value, "eventToken must not be null");
+    }
+
+    public static EventToken generate() {
+        return new EventToken(UUID.randomUUID());
+    }
+}
+```
+
+```java
+public record OrganizerToken(UUID value) { /* same pattern */ }
+public record RsvpToken(UUID value) { /* same pattern */ }
+```
+
+**Impact on existing code**:
+- `Event.java`: `UUID eventToken` → `EventToken eventToken`, `UUID organizerToken` → `OrganizerToken organizerToken`
+- `EventService.java`: `UUID.randomUUID()` → `EventToken.generate()` / `OrganizerToken.generate()`
+- `EventController.java`: unwrap tokens at API boundary (`token.value()`)
+- `EventRepository.java` / `EventPersistenceAdapter.java`: map between domain tokens and raw UUIDs for JPA
+- `EventJpaEntity.java`: stays with raw `UUID` columns (JPA mapping layer)
+- All existing tests: update to use typed tokens
+
+**Alternatives considered**:
+- Use raw UUID everywhere — rejected because the spec explicitly requires typed records and they prevent mixing up token types at compile time.
+- Introduce only `RsvpToken` now — rejected because it creates an inconsistency. All three should be uniform.
+
+## R-3: Attendee Count Population
+
+**Decision**: Populate `attendeeCount` in `GetEventResponse` by counting RSVP rows for the event. The count query lives in the `RsvpRepository` port and is called by `EventService` (or a query in `RsvpService` delegated to by `EventController`).
+
+**Rationale**: The `attendeeCount` field already exists in the API contract (returns 0 today per R-3 in 007). Now it gets real data. Since an RSVP entry's existence implies attendance (no `attending` boolean), the count is simply `COUNT(*) WHERE event_id = ?`.
+
+**Implementation approach**: Add `countByEventId(Long eventId)` to `RsvpRepository`. `EventService.getByEventToken()` returns the Event domain object; the controller queries the RSVP count separately and sets it on the response. This keeps Event and RSVP domains loosely coupled.
+
+**Alternatives considered**:
+- Store count on the Event entity (denormalized) — rejected because it introduces update anomalies and requires synchronization logic.
+- Join query in EventRepository — rejected because it couples Event persistence to RSVP schema.
+
+## R-4: Expired Event Guard
+
+**Decision**: Both client and server enforce the expiry guard. Client hides the RSVP form when `expired === true` (from GetEventResponse). Server rejects `POST /rsvps` with `409 Conflict` when `event.expiryDate < today`.
+
+**Rationale**: Defense in depth. The client check is UX (don't show a form that can't succeed). The server check is the authoritative guard (clients can be bypassed). Using `409 Conflict` rather than `400 Bad Request` because the request format is valid — it's the event state that prevents the operation.
+
+**Alternatives considered**:
+- Client-only guard — rejected because clients can be bypassed.
+- `400 Bad Request` — rejected because the request body is valid; the conflict is with the event's state.
+- `422 Unprocessable Entity` — acceptable but `409` better communicates "the resource state conflicts with this operation."
+
+## R-5: localStorage Schema for RSVP
+
+**Decision**: Extend the existing `fete:events` localStorage structure. Each `StoredEvent` entry gains optional `rsvpToken` and `rsvpName` fields.
+
+**Rationale**: The existing `useEventStorage` composable already stores events by token. Adding RSVP data to the same entry avoids a second localStorage key and keeps event data co-located. The spec requires storing: rsvpToken, name, event token, event title, event date — the last three are already in `StoredEvent`.
+
+**Schema change**:
+```typescript
+interface StoredEvent {
+  eventToken: string
+  organizerToken?: string   // existing (for organizers)
+  title: string             // existing
+  dateTime: string          // existing
+  expiryDate: string        // existing
+  rsvpToken?: string        // NEW — present after RSVP
+  rsvpName?: string         // NEW — guest's submitted name
+}
+```
+
+**Alternatives considered**:
+- Separate `fete:rsvps` localStorage key — rejected because it duplicates event metadata (title, date) and complicates lookups.
+- IndexedDB — rejected (over-engineering for a few KBs of data).
+
+## R-6: Bottom Sheet UI Pattern
+
+**Decision**: Implement the bottom sheet as a Vue component using CSS transforms and transitions. No UI library dependency.
+
+**Rationale**: The spec requires a bottom sheet for the RSVP form. A custom implementation using `transform: translateY()` with CSS transitions is lightweight, accessible, and avoids new dependencies (Principle V). The sheet slides up from the bottom on open and back down on close.
+
+**Key implementation details**:
+- Overlay backdrop (semi-transparent) with click-to-dismiss
+- `<dialog>` element or ARIA `role="dialog"` with `aria-modal="true"`
+- Focus trap inside the sheet (keyboard accessibility)
+- ESC key to close
+- Transition: `transform 0.3s ease-out`
+- Mobile: full-width, max-height ~50vh. Desktop: full-width within the 480px column.
+
+**Alternatives considered**:
+- Modal/dialog instead of bottom sheet — rejected because bottom sheets are the mobile-native pattern for contextual actions.
+- Headless UI library (e.g., @headlessui/vue) — rejected because it adds a dependency for a single component. Custom implementation is ~50 lines.
+
+## R-7: Sticky Bottom Bar
+
+**Decision**: The sticky bar is a `position: fixed` element at the bottom of the viewport, within the content column (max 480px). It contains either the RSVP CTA button or the RSVP status text.
+
+**Rationale**: The spec defines two states for the bar:
+1. **No RSVP**: Shows CTA button (accent color, "Ich bin dabei!" or similar)
+2. **Has RSVP**: Shows status text ("Du kommst!" + edit hint, though edit is out of scope)
+
+The bar state is determined by checking localStorage for an rsvpToken for the current event.
+
+**CSS pattern**:
+```css
+.sticky-bar {
+  position: fixed;
+  bottom: 0;
+  left: 50%;
+  transform: translateX(-50%);
+  width: 100%;
+  max-width: 480px; /* matches content column */
+  padding: 1rem 1.2rem;
+  /* glass-morphism or solid surface */
+}
+```
+
+**Alternatives considered**:
+- `position: sticky` at bottom of content — rejected because it only sticks within the scroll container, not the viewport. Fixed is needed for always-visible CTA.
+
+## R-8: Cancelled Event Guard (Deferred)
+
+**Decision**: FR-010 (cancelled event guard) is deferred per spec. The code will NOT check for cancellation status. This will be added when US-18 (cancel event) is implemented.
+
+**Rationale**: No cancellation field exists on the Event model yet. Adding a guard for a non-existent state violates KISS (Principle IV).

specs/008-rsvp/spec.md

@@ -5,11 +5,25 @@
 **Status**: Draft
 **Source**: Migrated from spec/userstories.md
 
+## Clarifications
+
+### Session 2026-03-06
+
+- Q: How should the server deduplicate RSVPs from the same device without accounts? → A: Server generates an `rsvpToken` (UUID) on first RSVP, returns it to the client. Client stores it in localStorage per event. On re-RSVP, client sends the `rsvpToken` to update instead of create. No global device identifier — the token is event-scoped. If localStorage is lost (cleared or different device), a duplicate entry is accepted as a privacy trade-off.
+- Q: Should typed token value objects be used in the backend? → A: Yes. Backend: The three token types (EventToken, OrganizerToken, RsvpToken) MUST be modeled as distinct Java record types wrapping UUID, not passed as raw UUID values. Frontend: No branded types — plain string variables with clear naming (eventToken, rsvpToken) are sufficient given TypeScript's structural typing and OpenAPI codegen.
+- Q: How should the RSVP interaction be presented on the event page? → A: Fullscreen event presentation (gradient background, later Unsplash). Title prominent at top, key facts below (description, date, attendee count) — spacious layout. Sticky bottom bar with RSVP CTA. Tap opens a bottom sheet with the RSVP form. After RSVP, the bar shows status ("Du kommst!" + edit option) instead of the CTA.
+- Q: How does the RSVP form handle declining? → A: There is no explicit "not attending" button. The bottom sheet only offers the attending flow (name + submit). To not attend, the guest simply closes the sheet. Withdrawing an existing RSVP (DELETE with rsvpToken) is out of scope — deferred to a separate edit-RSVP spec.
+- Q: Should the attendee name list be publicly visible on the event page? → A: No. Only the attendee count is shown publicly. The full name list is visible only to the organizer (via organizer link). This maximizes guest privacy.
+- Q: Should the RSVP endpoint have spam/abuse protection? → A: No. The RSVP endpoint is intentionally unprotected — risk is consciously accepted as a privacy trade-off consistent with the no-account, no-tracking philosophy. Protection measures can be retrofitted in a separate spec if real-world abuse occurs. KISS.
+- Q: How is the attendee count delivered and updated? → A: As a new `attendeeCount` field in the existing Event response (no separate endpoint). Loaded once on page load, no polling or WebSocket. After the guest's own RSVP submission, the count is optimistically incremented (+1) client-side. KISS.
+- Q: What determines the RSVP cutoff? → A: The event date itself. No separate expiry field. After the event date has passed, RSVPs are blocked (form hidden, server rejects).
+- Q: Should the RSVP entity have an `attending` boolean field? → A: No. The server only stores attending RSVPs — existence of an entry implies attendance. No `attending` boolean needed. Deletion of entries (withdrawal) is deferred to the edit-RSVP spec.
+
 ## User Scenarios & Testing
 
 ### User Story 1 - Submit an RSVP (Priority: P1)
 
-A guest opens an active event page and indicates whether they will attend. If attending, they must provide their name. If not attending, the name is optional. The RSVP is sent to the server and persisted. The guest's choice, name, event token, title, and date are saved in localStorage.
+A guest opens an active event page, which presents the event fullscreen (gradient background, title prominent at top, key facts below including attendee count). A sticky bottom bar shows an RSVP call-to-action. Tapping opens a bottom sheet with the RSVP form: name field + submit. The RSVP is sent to the server and persisted. The server returns an rsvpToken which, along with the name, event token, title, and date, is saved in localStorage. After submission, the bottom sheet closes and the sticky bar shows the guest's RSVP status. To not attend, the guest simply closes the sheet — no server request.
 
 **Why this priority**: Core interactive feature of the app. Without it, guests cannot communicate attendance, and the attendee list (US-2) has no data.
 
@@ -17,30 +31,15 @@ A guest opens an active event page and indicates whether they will attend. If at
 
 **Acceptance Scenarios**:
 
-1. **Given** a guest is on an active event page, **When** they select "I'm attending" and enter their name, **Then** the RSVP is submitted to the server, persisted, and the attendee list reflects the new entry.
-2. **Given** a guest is on an active event page, **When** they select "I'm attending" but leave the name blank, **Then** the form is not submitted and a validation message indicating the name is required is shown.
-3. **Given** a guest is on an active event page, **When** they select "I'm not attending" without entering a name, **Then** the RSVP is submitted successfully (name is optional for non-attendees).
-4. **Given** a guest submits an RSVP (attending or not), **When** the submission succeeds, **Then** the guest's RSVP choice, name, event token, event title, and event date are stored in localStorage on this device.
-5. **Given** a guest submits an RSVP, **When** the submission succeeds, **Then** no account, login, or personal data beyond the optionally entered name is required.
+1. **Given** a guest is on an active event page, **When** they tap the RSVP CTA, enter their name, and submit, **Then** the RSVP is submitted to the server, persisted, and the attendee count updates.
+2. **Given** a guest has opened the bottom sheet, **When** they leave the name blank and try to submit, **Then** the form is not submitted and a validation message is shown.
+3. **Given** a guest has opened the bottom sheet, **When** they close it without submitting, **Then** no server request is made and no state changes.
+4. **Given** a guest submits an RSVP, **When** the submission succeeds, **Then** the rsvpToken, name, event token, event title, and event date are stored in localStorage on this device.
+5. **Given** a guest submits an RSVP, **When** the submission succeeds, **Then** no account, login, or personal data beyond the entered name is required.
 
 ---
 
-### User Story 2 - Re-RSVP from the Same Device (Priority: P2)
-
-A returning guest on the same device opens an event page where they previously submitted an RSVP. The form pre-fills with their prior choice and name. Re-submitting updates the existing RSVP rather than creating a duplicate.
-
-**Why this priority**: Prevents duplicate entries and provides a better UX for guests who want to change their mind. Depends on Story 1 populating localStorage.
-
-**Independent Test**: Can be tested by RSVPing once, then reloading the event page and verifying the form is pre-filled and a second submission updates rather than duplicates the server-side record.
-
-**Acceptance Scenarios**:
-
-1. **Given** a guest has previously submitted an RSVP on this device, **When** they open the same event page again, **Then** the RSVP form is pre-filled with their previous choice and name.
-2. **Given** a guest has a prior RSVP pre-filled, **When** they change their selection and re-submit, **Then** the existing server-side RSVP entry is updated and no duplicate entry is created.
-
----
-
-### User Story 3 - RSVP Blocked on Expired or Cancelled Events (Priority: P2)
+### User Story 2 - RSVP Blocked on Expired or Cancelled Events (Priority: P2)
 
 A guest attempts to RSVP to an event that has already expired or has been cancelled. The RSVP form is not shown and the server rejects any submission attempts.
 
@@ -58,37 +57,40 @@ A guest attempts to RSVP to an event that has already expired or has been cancel
 
 ### Edge Cases
 
-- What happens when a guest RSVPs on two different devices? Each device stores its own localStorage entry; the server holds both RSVPs as separate entries (no deduplication across devices — acceptable per design, consistent with the no-account model).
+- What happens when a guest RSVPs on two different devices? Each device stores its own localStorage entry; the server holds both RSVPs as separate entries (no deduplication across devices — accepted privacy trade-off).
 - What happens when the server is unreachable during RSVP submission? The submission fails; localStorage is not updated (no optimistic write). The guest sees an error and can retry.
-- What happens if localStorage is cleared after RSVPing? The form no longer pre-fills and the guest can re-submit; the server will create a new RSVP entry rather than update the old one.
+- What happens if localStorage is cleared after RSVPing? The sticky bar shows the CTA again (as if no prior RSVP). A new submission creates a duplicate server-side entry — accepted privacy trade-off.
+- What about spam/abuse on the unprotected RSVP endpoint? Risk is consciously accepted (KISS, privacy-first). No rate limiting, no honeypot, no CAPTCHA. Can be retrofitted in a future spec if real-world abuse occurs.
 
 ## Requirements
 
 ### Functional Requirements
 
-- **FR-001**: The RSVP form MUST offer exactly two choices: "I'm attending" and "I'm not attending".
-- **FR-002**: When the guest selects "I'm attending", the name field MUST be required; submission MUST be blocked if the name is blank.
-- **FR-003**: When the guest selects "I'm not attending", the name field MUST be optional; submission MUST succeed without a name.
-- **FR-004**: On successful RSVP submission, the server MUST persist the RSVP associated with the event.
-- **FR-005**: On successful RSVP submission, the client MUST store the guest's RSVP choice and name in localStorage, keyed by event token.
+- **FR-001**: The RSVP bottom sheet MUST offer an attending flow only: name field (required, max 100 characters) + submit. There is no explicit "not attending" option — the guest simply closes the sheet.
+- **FR-002**: Submission MUST be blocked if the name is blank or exceeds 100 characters.
+- **FR-003**: If a prior RSVP for this event exists in localStorage (rsvpToken present), the sticky bottom bar MUST show the guest's RSVP status instead of the initial CTA. Editing the RSVP (name change, withdrawal) is out of scope for this spec.
+- **FR-004**: On successful attending RSVP submission, the server MUST persist the RSVP associated with the event and return an rsvpToken.
+- **FR-005**: On successful RSVP submission, the client MUST store the guest's name and the server-returned rsvpToken in localStorage, keyed by event token.
 - **FR-006**: On successful RSVP submission, the client MUST store the event token, event title, and event date in localStorage (to support the local event overview, US-7).
-- **FR-007**: If a prior RSVP for this event exists in localStorage, the form MUST pre-fill with the stored choice and name on page load.
-- **FR-008**: Re-submitting an RSVP from a device that has an existing server-side entry for this event MUST update the existing entry, not create a new one.
+- **FR-013**: The event page MUST present the event fullscreen with a sticky bottom bar containing the RSVP call-to-action. Tapping the CTA MUST open a bottom sheet with the RSVP form.
+- **FR-014**: After successful RSVP submission, the bottom sheet MUST close and the sticky bar MUST transition to showing the RSVP status.
 - **FR-009**: The RSVP form MUST NOT be shown and the server MUST reject RSVP submissions after the event's expiry date has passed.
 - **FR-010**: The RSVP form MUST NOT be shown and the server MUST reject RSVP submissions if the event has been cancelled [enforcement deferred until US-18 is implemented].
-- **FR-011**: RSVP submission MUST NOT require an account, login, or any personal data beyond the optionally entered name.
+- **FR-011**: RSVP submission MUST NOT require an account, login, or any personal data beyond the entered name.
 - **FR-012**: No personal data or IP address MUST be logged on the server when processing an RSVP.
+- **FR-015**: The event page MUST show only the attendee count publicly. The full attendee name list is out of scope (see 009-guest-list).
 
 ### Key Entities
 
-- **RSVP**: Represents a guest's attendance declaration. Attributes: event token reference, attending status (boolean), optional name, creation/update timestamp. The server-side identity key for deduplication is the combination of event token and a device-bound identifier [NEEDS EXPANSION: deduplication mechanism to be defined during implementation].
+- **RSVP**: Represents a guest's attendance declaration. Attributes: rsvpToken (server-generated UUID, returned to client), event reference, name (required), creation timestamp. Existence of an entry implies attendance — no `attending` boolean. The rsvpToken is returned to the client for future use (editing/withdrawal in a later spec). Duplicates from lost localStorage or different devices are accepted as a privacy trade-off.
+- **RsvpToken**: A server-generated, event-scoped UUID identifying a single RSVP entry. Modeled as a distinct Java record type (alongside EventToken and OrganizerToken). Stored client-side in localStorage per event.
 
 ## Success Criteria
 
 ### Measurable Outcomes
 
-- **SC-001**: A guest can submit an RSVP (attending with name, or not attending without name) from the event page without an account.
-- **SC-002**: Submitting an RSVP from the same device twice results in exactly one server-side RSVP entry for that guest (no duplicates).
+- **SC-001**: A guest can submit an RSVP (name + submit) from the event page without an account.
+- **SC-002**: After submitting, the sticky bar shows the guest's RSVP status (not the CTA).
 - **SC-003**: After submitting an RSVP, the local event overview (US-7) can display the event without a server request (event token, title, and date are in localStorage).
 - **SC-004**: The RSVP form is not shown on expired events, and direct server submissions for expired events are rejected.
 - **SC-005**: No name, IP address, or personal data beyond the submitted name is stored or logged by the server in connection with an RSVP.

specs/008-rsvp/tasks.md

@@ -0,0 +1,190 @@
+# Tasks: RSVP to an Event
+
+**Input**: Design documents from `/specs/008-rsvp/`
+**Prerequisites**: plan.md, spec.md, data-model.md, contracts/create-rsvp.yaml, research.md, quickstart.md
+
+**Tests**: Included — constitution mandates Test-Driven Methodology (tests before implementation).
+
+**Organization**: Tasks grouped by user story for independent implementation and testing.
+
+## Format: `[ID] [P?] [Story] Description`
+
+- **[P]**: Can run in parallel (different files, no dependencies)
+- **[Story]**: Which user story this task belongs to (e.g., US1, US2)
+- Exact file paths included in descriptions
+
+## Phase 1: Setup
+
+**Purpose**: OpenAPI spec and database migration — shared infrastructure for all user stories
+
+- [x] T001 Update OpenAPI spec with RSVP endpoint, request/response schemas, and `attendeeCount` population in `backend/src/main/resources/openapi/api.yaml`
+- [x] T002 [P] Create Liquibase migration for rsvps table in `backend/src/main/resources/db/changelog/003-create-rsvps-table.xml`
+- [x] T003 [P] Include new migration in `backend/src/main/resources/db/changelog/db.changelog-master.xml`
+
+---
+
+## Phase 2: Foundational (Blocking Prerequisites)
+
+**Purpose**: Token value objects and cross-cutting refactoring — MUST complete before user stories
+
+**Why blocking**: All new RSVP code uses typed tokens. Existing code must be refactored first to avoid mixing raw UUID and typed tokens.
+
+- [x] T004 [P] Create `EventToken` record in `backend/src/main/java/de/fete/domain/model/EventToken.java`
+- [x] T005 [P] Create `OrganizerToken` record in `backend/src/main/java/de/fete/domain/model/OrganizerToken.java`
+- [x] T006 [P] Create `RsvpToken` record in `backend/src/main/java/de/fete/domain/model/RsvpToken.java`
+- [x] T007 Refactor `Event` domain model to use `EventToken`/`OrganizerToken` in `backend/src/main/java/de/fete/domain/model/Event.java`
+- [x] T008 Refactor `EventRepository` port to use typed tokens in `backend/src/main/java/de/fete/domain/port/out/EventRepository.java`
+- [x] T009 Refactor `EventPersistenceAdapter` to map typed tokens in `backend/src/main/java/de/fete/adapter/out/persistence/EventPersistenceAdapter.java`
+- [x] T010 Refactor `EventService` to use typed tokens in `backend/src/main/java/de/fete/application/service/EventService.java`
+- [x] T011 Refactor `EventController` to unwrap/wrap typed tokens at API boundary in `backend/src/main/java/de/fete/adapter/in/web/EventController.java`
+- [x] T012 Update `EventServiceTest` to use typed tokens in `backend/src/test/java/de/fete/application/service/EventServiceTest.java`
+- [x] T013 Update `EventControllerIntegrationTest` to use typed tokens in `backend/src/test/java/de/fete/adapter/in/web/EventControllerIntegrationTest.java`
+- [x] T014 Verify all existing tests pass after token refactoring (`cd backend && ./mvnw test`)
+
+**Checkpoint**: All existing tests green with typed tokens. New RSVP domain work can begin.
+
+---
+
+## Phase 3: User Story 1 — Submit an RSVP (Priority: P1) MVP
+
+**Goal**: A guest can open an active event page, tap the RSVP CTA, enter their name, submit, and see confirmation. Server persists the RSVP and returns an rsvpToken. localStorage stores RSVP data. Attendee count is populated from real data.
+
+**Independent Test**: Open an event page, submit an RSVP with a name, verify attendee count updates, verify localStorage contains rsvpToken and name.
+
+### Backend Tests for US1
+
+- [x] T015 [P] [US1] Write unit tests for `RsvpService` (create RSVP, validation, event-not-found) in `backend/src/test/java/de/fete/application/service/RsvpServiceTest.java`
+- [x] T016 [P] [US1] Write integration tests for `POST /events/{eventToken}/rsvps` (201 success, 400 validation, 404 not found) in `backend/src/test/java/de/fete/adapter/in/web/EventControllerIntegrationTest.java`
+
+### Backend Implementation for US1
+
+- [x] T017 [P] [US1] Create `Rsvp` domain entity in `backend/src/main/java/de/fete/domain/model/Rsvp.java`
+- [x] T018 [P] [US1] Create `CreateRsvpUseCase` inbound port in `backend/src/main/java/de/fete/domain/port/in/CreateRsvpUseCase.java`
+- [x] T019 [P] [US1] Create `RsvpRepository` outbound port with `save()` and `countByEventId()` in `backend/src/main/java/de/fete/domain/port/out/RsvpRepository.java`
+- [x] T020 [P] [US1] Create `RsvpJpaEntity` in `backend/src/main/java/de/fete/adapter/out/persistence/RsvpJpaEntity.java`
+- [x] T021 [P] [US1] Create `RsvpJpaRepository` (Spring Data) in `backend/src/main/java/de/fete/adapter/out/persistence/RsvpJpaRepository.java`
+- [x] T022 [US1] Implement `RsvpPersistenceAdapter` in `backend/src/main/java/de/fete/adapter/out/persistence/RsvpPersistenceAdapter.java`
+- [x] T023 [US1] Implement `RsvpService` (create RSVP logic, validate event exists) in `backend/src/main/java/de/fete/application/service/RsvpService.java`
+- [x] T024 [US1] Add `createRsvp()` method to `EventController` in `backend/src/main/java/de/fete/adapter/in/web/EventController.java`
+- [x] T025 [US1] Wire attendee count: add `countByEventId()` call to GET event flow, populate `attendeeCount` in response in `backend/src/main/java/de/fete/adapter/in/web/EventController.java`
+- [x] T026 [US1] Verify backend tests pass (`cd backend && ./mvnw test`)
+
+### Frontend Tests for US1
+
+- [ ] T027 [P] [US1] Write unit tests for `BottomSheet` component in `frontend/src/components/__tests__/BottomSheet.spec.ts`
+- [ ] T028 [P] [US1] Write unit tests for `RsvpBar` component in `frontend/src/components/__tests__/RsvpBar.spec.ts`
+- [ ] T029 [P] [US1] Update unit tests for `useEventStorage` composable (rsvpToken/rsvpName fields) in `frontend/src/composables/__tests__/useEventStorage.spec.ts`
+
+### Frontend Implementation for US1
+
+- [ ] T030 [US1] Regenerate TypeScript types from updated OpenAPI spec (`frontend/src/api/schema.d.ts`)
+- [ ] T031 [P] [US1] Extend `useEventStorage` composable with `rsvpToken` and `rsvpName` fields in `frontend/src/composables/useEventStorage.ts`
+- [ ] T032 [P] [US1] Create `BottomSheet.vue` component (slide-up, backdrop, focus trap, ESC close, aria-modal) in `frontend/src/components/BottomSheet.vue`
+- [ ] T033 [P] [US1] Create `RsvpBar.vue` sticky bottom bar (CTA state + status state) in `frontend/src/components/RsvpBar.vue`
+- [ ] T034 [US1] Integrate `RsvpBar` + `BottomSheet` + RSVP form into `EventDetailView`, including error state when server is unreachable, in `frontend/src/views/EventDetailView.vue`
+- [ ] T035 [US1] Add bottom sheet and sticky bar styles to `frontend/src/assets/main.css`
+- [ ] T036 [US1] Update `EventDetailView` unit tests for RSVP integration in `frontend/src/views/__tests__/EventDetailView.spec.ts`
+
+### E2E Tests for US1
+
+- [ ] T037 [US1] Write E2E tests: RSVP submission flow, localStorage verification, attendee count update in `frontend/e2e/event-rsvp.spec.ts`
+
+**Checkpoint**: US1 complete — guest can submit RSVP, see confirmation, attendee count populated. All backend + frontend tests green.
+
+---
+
+## Phase 4: User Story 2 — RSVP Blocked on Expired Events (Priority: P2)
+
+**Goal**: Expired events hide the RSVP form and the server rejects RSVP submissions with 409 Conflict.
+
+**Independent Test**: Attempt to RSVP to an expired event — verify form is hidden client-side and server returns 409.
+
+### Tests for US2
+
+- [ ] T038 [P] [US2] Write backend test for expired event rejection (409) in `backend/src/test/java/de/fete/application/service/RsvpServiceTest.java`
+- [ ] T039 [P] [US2] Write integration test for `POST /events/{eventToken}/rsvps` returning 409 on expired event in `backend/src/test/java/de/fete/adapter/in/web/EventControllerIntegrationTest.java`
+
+### Implementation for US2
+
+- [ ] T040 [US2] Add expiry check to `RsvpService.createRsvp()` — throw `EventExpiredException` when event date has passed in `backend/src/main/java/de/fete/application/service/RsvpService.java`
+- [ ] T041 [US2] Handle `EventExpiredException` in `GlobalExceptionHandler` — return 409 Conflict in `backend/src/main/java/de/fete/adapter/in/web/GlobalExceptionHandler.java`
+- [ ] T042 [US2] Hide RSVP bar/form on expired events in `EventDetailView` (check `expired` field from API response) in `frontend/src/views/EventDetailView.vue`
+- [ ] T043 [US2] Write E2E test for expired event: verify RSVP form hidden, direct API call returns 409 in `frontend/e2e/event-rsvp.spec.ts`
+- [ ] T044 [US2] Verify all tests pass (`cd backend && ./mvnw test && cd ../frontend && npm run test:unit`)
+
+**Checkpoint**: US2 complete — expired events block RSVPs client-side and server-side.
+
+---
+
+## Phase 5: Polish & Cross-Cutting Concerns
+
+**Purpose**: Final verification across all stories
+
+- [ ] T045 Run full backend verify (`cd backend && ./mvnw verify`)
+- [ ] T046 Run frontend build and type-check (`cd frontend && npm run build`)
+- [ ] T047 Run all E2E tests (`cd frontend && npx playwright test`)
+- [ ] T048 Visual verification of RSVP flow using `browser-interactive-testing` skill
+
+---
+
+## Dependencies & Execution Order
+
+### Phase Dependencies
+
+- **Setup (Phase 1)**: No dependencies — can start immediately
+- **Foundational (Phase 2)**: Depends on T001 (OpenAPI spec) for schema awareness; T002-T003 (migration) independent
+- **US1 (Phase 3)**: Depends on Phase 2 completion (typed tokens in place)
+- **US2 (Phase 4)**: Depends on Phase 3 (RSVP creation must exist before expiry guard)
+- **Polish (Phase 5)**: Depends on all user stories complete
+
+### User Story Dependencies
+
+- **US1 (P1)**: Can start after Phase 2 — no dependency on US2
+- **US2 (P2)**: Depends on US1 (the RSVP endpoint and form must exist before adding the expiry guard)
+
+### Within Each User Story
+
+- Tests MUST be written first and FAIL before implementation
+- Domain model/ports before persistence adapters
+- Persistence before services
+- Services before controllers
+- Backend before frontend (API must exist for frontend to consume)
+- Frontend components before view integration
+- Unit tests before E2E tests
+
+### Parallel Opportunities
+
+**Phase 1**: T002 and T003 can run in parallel with T001
+**Phase 2**: T004, T005, T006 in parallel; then T007-T013 sequentially (refactoring chain)
+**Phase 3 Backend**: T015+T016 (tests) in parallel; T017+T018+T019+T020+T021 (domain/ports/JPA) in parallel; then T022→T023→T024→T025 sequential
+**Phase 3 Frontend**: T027+T028+T029 (tests) in parallel; T031+T032+T033 in parallel; then T034→T035→T036→T037 sequential
+**Phase 4**: T038+T039 (tests) in parallel; then T040→T041→T042→T043→T044 sequential
+
+---
+
+## Implementation Strategy
+
+### MVP First (User Story 1 Only)
+
+1. Complete Phase 1: Setup (OpenAPI + migration)
+2. Complete Phase 2: Foundational (token value objects + refactoring)
+3. Complete Phase 3: User Story 1 (full RSVP flow)
+4. **STOP and VALIDATE**: Guest can submit RSVP, see confirmation, attendee count works
+5. Deploy/demo if ready
+
+### Incremental Delivery
+
+1. Setup + Foundational → Token refactoring complete, schema ready
+2. Add US1 → Full RSVP flow works → Deploy/Demo (MVP!)
+3. Add US2 → Expired events guarded → Deploy/Demo
+4. Polish → All tests green, visual verification done
+
+---
+
+## Notes
+
+- Cancelled event guard (FR-010) is deferred until US-18 — NOT included in tasks
+- No CAPTCHA/rate-limiting per spec (KISS, privacy-first)
+- RSVP editing/withdrawal deferred to separate edit-RSVP spec
+- Frontend uses plain `string` for tokens (no branded types) per clarification
+- Backend uses typed records (`EventToken`, `OrganizerToken`, `RsvpToken`) per clarification