# Implementation Plan: Event List on Home Page

**Branch**: `009-list-events` | **Date**: 2026-03-08 | **Spec**: `specs/009-list-events/spec.md`
**Input**: Feature specification from `/specs/009-list-events/spec.md`

## Summary

Transform the home page from a static empty-state placeholder into a dynamic event list that shows all events stored in the browser's localStorage. Each event card displays title, relative time, and role indicator (organizer/attendee). Events are sorted chronologically (upcoming first), past events appear faded, and users can remove events via delete icon or swipe gesture. A FAB provides persistent access to event creation.

This is a **frontend-only** feature — no backend or API changes required. The existing `useEventStorage` composable already provides all necessary data access.

## Technical Context

**Language/Version**: TypeScript 5.9, Vue 3.5
**Primary Dependencies**: Vue 3, Vue Router 5, Vite
**Storage**: Browser localStorage via `useEventStorage` composable
**Testing**: Vitest (unit), Playwright + MSW (E2E)
**Target Platform**: Mobile-first PWA (centered 480px column on desktop)
**Project Type**: Web application (frontend-only changes)
**Performance Goals**: Event list renders within 1 second (SC-001) — trivial given localStorage read
**Constraints**: No external dependencies, no tracking, WCAG AA, keyboard navigable
**Scale/Scope**: Typically <50 events in localStorage; no pagination needed

## Constitution Check

*GATE: Must pass before Phase 0 research. Re-check after Phase 1 design.*

| Principle | Status | Notes |
|-----------|--------|-------|
| I. Privacy by Design | ✅ PASS | Purely client-side. No data leaves the browser. No analytics. |
| II. Test-Driven Methodology | ✅ PASS | Unit tests for composable, E2E for each user story. TDD enforced. |
| III. API-First Development | ✅ N/A | No API changes — this feature reads only from localStorage. |
| IV. Simplicity & Quality | ✅ PASS | Minimal approach: extend existing composable + new components. No over-engineering. |
| V. Dependency Discipline | ✅ PASS | No new dependencies. Swipe gesture implemented with native Touch API. Relative time via built-in `Intl.RelativeTimeFormat`. |
| VI. Accessibility | ✅ PASS | Semantic list markup, ARIA labels, keyboard navigation, WCAG AA contrast on faded past events. |

**Gate result: PASS** — no violations.

## Project Structure

### Documentation (this feature)

```text
specs/009-list-events/
├── plan.md              # This file
├── spec.md              # Feature specification
├── research.md          # Phase 0 output
├── data-model.md        # Phase 1 output
└── tasks.md             # Phase 2 output (/speckit.tasks command)
```

### Source Code (repository root)

```text
frontend/
├── src/
│   ├── composables/
│   │   ├── useEventStorage.ts       # MODIFY: add removeEvent()
│   │   ├── useRelativeTime.ts       # NEW: Intl.RelativeTimeFormat wrapper
│   │   └── __tests__/
│   │       ├── useEventStorage.spec.ts  # MODIFY: add removeEvent tests
│   │       └── useRelativeTime.spec.ts  # NEW: relative time formatting tests
│   ├── components/
│   │   ├── EventCard.vue            # NEW: individual event list item
│   │   ├── EventList.vue            # NEW: sorted event list container
│   │   ├── EmptyState.vue           # NEW: extracted empty state
│   │   ├── CreateEventFab.vue       # NEW: floating action button
│   │   ├── ConfirmDialog.vue        # NEW: reusable confirmation prompt
│   │   └── __tests__/
│   │       ├── EventCard.spec.ts    # NEW
│   │       ├── EventList.spec.ts    # NEW
│   │       ├── EmptyState.spec.ts   # NEW
│   │       └── ConfirmDialog.spec.ts # NEW
│   ├── views/
│   │   └── HomeView.vue             # MODIFY: compose list/empty/fab
│   └── assets/
│       └── main.css                 # MODIFY: add event card, faded, fab styles
└── e2e/
    └── home-events.spec.ts          # NEW: E2E tests for all user stories
```

**Structure Decision**: Frontend-only changes. New components in `components/`, composable extensions in `composables/`, styles in existing `main.css`. No backend changes.

## Complexity Tracking

No constitution violations — this section is intentionally empty.