feat(02-05): ColorLegend, AppNav, ViewToolbar, SkeletonCalendar, EmptyState; retire EventProof

- ColorLegend: per-member color swatches (12px circle, label) + always-visible Family row
- AppNav: phone 48px top bar (avatar with aria-label/title) + tablet/desktop 240px sidebar with ColorLegend
- ViewToolbar: Today/prev/next + Day/Week/Month/Agenda view switcher; 44px min-height; active state uses surface tint not accent
- SkeletonCalendar: shimmer month (6x7 grid) and agenda (4 date-group blocks) variants; aria-busy=true
- EmptyState: CalendarDays icon + 'Nothing here' heading + body copy per UI-SPEC
- CalendarShell: full phone/desktop layout with AppNav + ViewToolbar + ColorLegend chrome
- CalendarShell: state branches — loading→SkeletonCalendar, empty→EmptyState, error→'Couldn't load events' + Retry button (refetchQueries)
- EventProof.tsx deleted; legacy types removed from client.ts
- CalendarShell.test.tsx: updated to waitFor ScheduleXCalendar after data loads
- All 36 tests pass, tsc clean, vite build clean (490kB)

apps/pwa/src/api/client.ts

@@ -95,43 +95,5 @@ export async function fetchEvents(
   return res.json() as Promise<OccurrencesResponse>
 }
 
-// ── Legacy types + function for EventProof (Phase 1 broker-proof component) ──
-// EventProof.tsx uses these; the component is removed in Plan 05.
-// Kept here to prevent build breakage until then.
-
-/**
- * @deprecated Phase 1 raw cache shape — use CalendarOccurrence for Phase 2.
- * EventProof uses this type; it is removed in Plan 05.
- */
-export interface CalendarEvent {
-  id: number
-  calendarId: number
-  uid: string
-  etag: string | null
-  rawVevent: string
-  dtstartUtc: string | null
-  dtstartDate: string | null
-  allDay: boolean
-  updatedAt: string | null
-}
-
-/**
- * @deprecated Phase 1 raw response shape — use OccurrencesResponse for Phase 2.
- */
-export interface EventsResponse {
-  events: CalendarEvent[]
-}
-
-/**
- * @deprecated Phase 1 broker-proof fetch — unwindowed, returns raw cache rows.
- * Used only by EventProof.tsx; removed in Plan 05.
- */
-export async function fetchEventsLegacy(): Promise<EventsResponse> {
-  const res = await fetch('/api/events', {
-    credentials: 'include',
-  })
-  if (!res.ok) {
-    throw new Error(`GET /api/events failed: ${res.status}`)
-  }
-  return res.json() as Promise<EventsResponse>
-}
+// Phase 1 legacy types (CalendarEvent, EventsResponse, fetchEventsLegacy) removed in Plan 05
+// when the Phase 1 broker-proof component was retired.