# Phase 2: Calendar Display - Context

**Gathered:** 2026-06-04
**Status:** Ready for planning

<domain>
## Phase Boundary

A unified, color-coded, **read-only** calendar that aggregates every accessible Fastmail
calendar (shared family + each member's personal) into one view, with day / week / month /
agenda views, correct rendering of recurring events (server-side expansion), all-day events
(no timezone shift), and DST boundaries. Built on the broker confirmed in Phase 1.

**Out of scope (other phases):** event create/edit/delete write-back (Phase 3), PWA install
(Phase 3), shared lists (Phase 4), web push (Phase 5), the tablet/wall-display **kiosk mode**
and a runtime theme-switcher (v2 — see Deferred), per-member show/hide filtering (deferred
until >2 members), single-occurrence recurring edits (v1.x).
</domain>

<decisions>
## Implementation Decisions

### Theming architecture (the load-bearing decision)

- **D-01:** Build a **design-token layer** — color, spacing, density, and typography expressed
  as CSS custom properties + a small theme object — and build the UI exclusively against those
  tokens. No hard-coded colors/spacing in components.
- **D-02:** Ship **only the "clean" theme** in Phase 2. A future Skylight/tablet "display" theme
  must be achievable as a **token-set swap, not a refactor**. Do NOT build the second theme or a
  runtime theme-switcher UI now (those are v2 kiosk work).
- **D-03:** Even the clean theme is tuned to be **legible and informational at tablet distance**,
  not ultra-minimal — the v2 north star is a tablet wall-display, so the clean theme must not be
  so sparse that it can't carry information. (Rationale: user's real end goal is a tablet display;
  see [[project-familysync]] / PROJECT.md Out-of-Scope note on wall display.)

### Views & default

- **D-04:** Provide all four views: **day, week, month, agenda** (CAL-03).
- **D-05:** **Device-adaptive default view:** phone → **Agenda** (lowest friction for the
  non-technical iPhone member); tablet/desktop → **Month** (spatial overview, closest to the v2
  display). Remember the last-used view per device.

### Color & ownership legibility

- **D-06:** **Per-member color fill** using the color already assigned on the user row in Phase 1
  (6-color palette already scales as members are added); the **shared-family calendar gets one
  reserved, distinct color**. This is the "whose is this" signal and must read at a glance.
- **D-07:** Show a small **color legend / key** (member → color) so ownership is decodable. A
  per-member show/hide **filter is deferred** until there are more than two members (same trigger
  as the future display theme) — a 2-person household doesn't need it yet.

### Event detail density

- **D-08:** **Informational + tap-to-expand.** Month = colored bars with the event title (not bare
  dots); Week/Day = time + title; Agenda = time + title + location. Tapping any event opens a
  **read-only detail popover** (title, time, location, description) — this popover is intended to
  be **reused as the edit surface in Phase 3**, so build it with that in mind.

### Recurrence / time (carried forward — not re-discussed)

- **D-09:** Recurring events are **expanded server-side** (`CALDAV:expand` / broker emits concrete
  occurrences for the requested window) — locked in STATE/CLAUDE. The client renders occurrences;
  it does not run rrule expansion itself for the primary path.
- **D-10:** **Single local timezone** for v1 — all-day events render with no date shift (D-13 split
  already in the schema). Secondary-timezone display toggle is deferred to v1.x.

### Claude's Discretion

- Week start day (Sunday vs Monday): default **Sunday** (US locale — the account has a "USA
  Holidays" calendar); expose as a token/config so it's trivial to flip. Planner/researcher may
  confirm.
- Exact rendering library is the **researcher's call** — but it must support headless/custom
  styling against the token layer (D-01), all four views, server-expanded occurrences, all-day
  banners, and good touch UX on iOS. (Candidates to evaluate, not locked: Schedule-X,
  react-big-calendar, FullCalendar, or a Temporal-based custom grid. Avoid libs that force their
  own opinionated theme and can't be token-styled.)
- Skeleton/loading and empty states: build them, polished enough for the "slick" constraint.

### Dev-auth bypass (from D-14, project-level)

- `/api/*` is OIDC-gated, but live Authelia is deferred (D-14). Plan a **documented dev-auth
  bypass** (e.g., an env-flagged middleware that injects a fixed dev user) so Phase 2 UI can be
  built and tested locally without a live OIDC provider. Must be off by default / impossible in
  production builds.
  </decisions>

<canonical_refs>

## Canonical References

**Downstream agents MUST read these before planning or implementing.**

### Project decisions & scope

- `.planning/PROJECT.md` — core value, constraints, Key Decisions incl. D-14/D-15; wall-display is v2 (informs D-02/D-03).
- `.planning/ROADMAP.md` §"Phase 2: Calendar Display" — goal + success criteria; §Phase 3/4 for scope boundaries.
- `.planning/REQUIREMENTS.md` — CAL-02 (unified color-coded view), CAL-03 (day/week/month/agenda), and the recurring-event _display_ portion of CAL-07.

### Phase 1 foundation this builds on

- `.planning/phases/01-foundation-broker-spike/01-03-SUMMARY.md` — broker API surface (syncCalendar, poller), event cache shape.
- `.planning/phases/01-foundation-broker-spike/01-04-SUMMARY.md` — index.ts route wiring, `/api/events`, `/api/me`.
- `.planning/phases/01-foundation-broker-spike/CAL-08-DECISION.md` — per-member app-password model (how multiple members' calendars aggregate).
- `apps/api/src/routes/events.ts` — current `/api/events` (raw cache dump; will need expansion + parsed fields + color/owner for display).
- `apps/api/src/db/schema.ts` — `users.color`, `calendars.userId`, `calendarEvents` (dtstartUtc/dtstartDate/allDay/rawVevent) — the D-13 split the display relies on.
- `CLAUDE.md` — locked stack (React 19, Vite, TanStack Query, Zustand, ical.js, rrule), CalDAV/expand guidance, iOS constraints.
- `docs/deployment.md` — dev-auth bypass context lives alongside Gate 2 (D-14).
  </canonical_refs>

<code_context>

## Existing Code Insights

### Reusable Assets

- `apps/pwa/src/api/client.ts` — typed fetch client (`fetchMe`, `credentials: 'include'`); extend with a typed `fetchEvents(range)`.
- `apps/pwa/src/components/EventProof.tsx` — proof-of-concept that already fetches `/api/events` and parses a VEVENT; the calendar replaces/absorbs it.
- `apps/pwa/src/App.tsx` — member badge (name + color via `/api/me`); the per-member color source for D-06.
- `apps/pwa/src/main.tsx` — `QueryClientProvider` already set up (TanStack Query is the server-state owner).

### Established Patterns

- Server state → TanStack Query; UI-only state (selected date, current view) → Zustand (locked; do not put events in Zustand).
- Broker is the ONLY Fastmail I/O boundary; `/api/events` reads the MariaDB cache only (no tsdav in routes) — recurrence expansion belongs server-side near the broker/route, never a direct Fastmail call from the UI.
- Hono app exported from `index.ts` without auto-starting (testable); add display-oriented endpoints there.

### Integration Points

- `/api/events` must evolve from "raw row dump" to a display-ready shape: expanded occurrences within a requested date window, parsed title/time/location, all-day flag, and member color / shared-vs-personal indicator (join calendarEvents → calendars → users.color). This is the main backend work of Phase 2.
- Dev-auth bypass middleware sits in front of `/api/*` (see D-14).
  </code_context>

<specifics>
## Specific Ideas

- "Clean theme now, switch to **Skylight style** later" — Skylight = large, glanceable, high-contrast family dashboard. It's the reference for the future display theme; the token layer (D-01) exists to make that swap cheap.
- The **real end goal is a tablet wall-display** — legibility and information density are first-class even in v1's clean theme (D-03).
- Theme/aesthetic reference target: Apple/Fantastical-style clean for v1.
  </specifics>

<deferred>
## Deferred Ideas

- **Tablet / wall-display kiosk mode** + the actual Skylight "display" theme + runtime theme-switcher UI — **v2** (PROJECT.md Out-of-Scope). Phase 2 only guarantees the token architecture makes this a swap, not a rewrite.
- **Per-member show/hide filter** — add when membership grows beyond two (D-07).
- **Secondary timezone display toggle** — v1.x (already in roadmap deferred items).
- **Single-occurrence / "this and following" recurring edits** — v1.x; Phase 3 does create + whole-series only.

### Reviewed Todos (not folded)

- `kickoff-new-project.md` ("Kick off FamilySync with /gsd:new-project") — matched only on generic keywords (date/requirements/phase); a stale project-bootstrap todo, not Phase 2 scope.
  </deferred>

---

_Phase: 2-Calendar Display_
_Context gathered: 2026-06-04_
