Dismiss side panel when encounter becomes empty

Closes the stat block / source manager panel when the last combatant
is removed or the encounter is cleared, giving a fully clean state.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

apps/web/src/App.tsx

@@ -30,6 +30,13 @@ export function App() {
 	const activeRowRef = useRef<HTMLDivElement>(null);
 	const actionBarAnim = useActionBarAnimation(encounter.combatants.length);
 
+	// Close the side panel when the encounter becomes empty
+	useEffect(() => {
+		if (isEmpty) {
+			sidePanel.dismissPanel();
+		}
+	}, [isEmpty, sidePanel.dismissPanel]);
+
 	// Auto-scroll to active combatant when turn changes
 	const activeIndex = encounter.activeIndex;
 	useEffect(() => {

apps/web/src/components/__tests__/turn-navigation.test.tsx

@@ -52,8 +52,10 @@ function mockContext(overrides: Partial<Encounter> = {}) {
 		toggleCondition: vi.fn(),
 		toggleConcentration: vi.fn(),
 		addFromBestiary: vi.fn(),
+		addMultipleFromBestiary: vi.fn(),
 		addFromPlayerCharacter: vi.fn(),
 		makeStore: vi.fn(),
+		withUndo: vi.fn((action: () => unknown) => action()),
 		undo: vi.fn(),
 		redo: vi.fn(),
 		canUndo: false,

apps/web/src/hooks/use-action-bar-state.ts

@@ -26,8 +26,12 @@ export function creatureKey(r: SearchResult): string {
 }
 
 export function useActionBarState() {
-	const { addCombatant, addFromBestiary, addFromPlayerCharacter } =
+	const {
-		useEncounterContext();
+		addCombatant,
+		addFromBestiary,
+		addMultipleFromBestiary,
+		addFromPlayerCharacter,
+	} = useEncounterContext();
 	const { search: bestiarySearch, isLoaded: bestiaryLoaded } =
 		useBestiaryContext();
 	const { characters: playerCharacters } = usePlayerCharactersContext();
@@ -92,11 +96,24 @@ export function useActionBarState() {
 
 	const confirmQueued = useCallback(() => {
 		if (!queued) return;
-		for (let i = 0; i < queued.count; i++) {
+		if (queued.count === 1) {
 			handleAddFromBestiary(queued.result);
+		} else {
+			const creatureId = addMultipleFromBestiary(queued.result, queued.count);
+			const isDesktop = globalThis.matchMedia("(min-width: 1024px)").matches;
+			if (creatureId && panelView.mode === "closed" && isDesktop) {
+				showCreature(creatureId);
+			}
 		}
 		clearInput();
-	}, [queued, handleAddFromBestiary, clearInput]);
+	}, [
+		queued,
+		handleAddFromBestiary,
+		addMultipleFromBestiary,
+		panelView.mode,
+		showCreature,
+		clearInput,
+	]);
 
 	const parseNum = (v: string): number | undefined => {
 		if (v.trim() === "") return undefined;

apps/web/src/hooks/use-encounter.ts

@@ -298,9 +298,10 @@ export function useEncounter() {
 		setEvents((prev) => [...prev, ...result]);
 	}, [makeStore]);
 
-	const addFromBestiary = useCallback(
+	const addOneFromBestiary = useCallback(
-		(entry: BestiaryIndexEntry): CreatureId | null => {
+		(
-			const snapshot = encounterRef.current;
+			entry: BestiaryIndexEntry,
+		): { cId: CreatureId; events: DomainEvent[] } | null => {
 			const store = makeStore();
 			const existingNames = store.get().combatants.map((c) => c.name);
 			const { newName, renames } = resolveCreatureName(
@@ -328,8 +329,20 @@ export function useEncounter() {
 				creatureId: cId,
 			});
 
-			if (isDomainError(result)) {
+			if (isDomainError(result)) return null;
-				store.save(snapshot);
+
+			return { cId, events: result };
+		},
+		[makeStore],
+	);
+
+	const addFromBestiary = useCallback(
+		(entry: BestiaryIndexEntry): CreatureId | null => {
+			const snapshot = encounterRef.current;
+			const added = addOneFromBestiary(entry);
+
+			if (!added) {
+				makeStore().save(snapshot);
 				return null;
 			}
 
@@ -337,10 +350,36 @@ export function useEncounter() {
 			undoRedoRef.current = newState;
 			setUndoRedoState(newState);
 
-			setEvents((prev) => [...prev, ...result]);
+			setEvents((prev) => [...prev, ...added.events]);
-			return cId;
+			return added.cId;
 		},
-		[makeStore],
+		[makeStore, addOneFromBestiary],
+	);
+
+	const addMultipleFromBestiary = useCallback(
+		(entry: BestiaryIndexEntry, count: number): CreatureId | null => {
+			const snapshot = encounterRef.current;
+			const allEvents: DomainEvent[] = [];
+			let lastCId: CreatureId | null = null;
+
+			for (let i = 0; i < count; i++) {
+				const added = addOneFromBestiary(entry);
+				if (!added) {
+					makeStore().save(snapshot);
+					return null;
+				}
+				allEvents.push(...added.events);
+				lastCId = added.cId;
+			}
+
+			const newState = pushUndo(undoRedoRef.current, snapshot);
+			undoRedoRef.current = newState;
+			setUndoRedoState(newState);
+
+			setEvents((prev) => [...prev, ...allEvents]);
+			return lastCId;
+		},
+		[makeStore, addOneFromBestiary],
 	);
 
 	const addFromPlayerCharacter = useCallback(
@@ -426,9 +465,11 @@ export function useEncounter() {
 		toggleCondition,
 		toggleConcentration,
 		addFromBestiary,
+		addMultipleFromBestiary,
 		addFromPlayerCharacter,
 		undo: undoAction,
 		redo: redoAction,
 		makeStore,
+		withUndo,
 	} as const;
 }

apps/web/src/hooks/use-initiative-rolls.ts

@@ -17,7 +17,7 @@ function rollDice(): number {
 }
 
 export function useInitiativeRolls() {
-	const { encounter, makeStore } = useEncounterContext();
+	const { encounter, makeStore, withUndo } = useEncounterContext();
 	const { getCreature } = useBestiaryContext();
 	const { showCreature } = useSidePanelContext();
 
@@ -28,12 +28,8 @@ export function useInitiativeRolls() {
 		(id: CombatantId, mode: RollMode = "normal") => {
 			const diceRolls: [number, ...number[]] =
 				mode === "normal" ? [rollDice()] : [rollDice(), rollDice()];
-			const result = rollInitiativeUseCase(
+			const result = withUndo(() =>
-				makeStore(),
+				rollInitiativeUseCase(makeStore(), id, diceRolls, getCreature, mode),
-				id,
-				diceRolls,
-				getCreature,
-				mode,
 			);
 			if (isDomainError(result)) {
 				setRollSingleSkipped(true);
@@ -43,22 +39,19 @@ export function useInitiativeRolls() {
 				}
 			}
 		},
-		[makeStore, getCreature, encounter.combatants, showCreature],
+		[makeStore, getCreature, withUndo, encounter.combatants, showCreature],
 	);
 
 	const handleRollAllInitiative = useCallback(
 		(mode: RollMode = "normal") => {
-			const result = rollAllInitiativeUseCase(
+			const result = withUndo(() =>
-				makeStore(),
+				rollAllInitiativeUseCase(makeStore(), rollDice, getCreature, mode),
-				rollDice,
-				getCreature,
-				mode,
 			);
 			if (!isDomainError(result) && result.skippedNoSource > 0) {
 				setRollSkippedCount(result.skippedNoSource);
 			}
 		},
-		[makeStore, getCreature],
+		[makeStore, getCreature, withUndo],
 	);
 
 	return {