epic: ship Calendar and My Shows as the first fan-retention milestone

[chubes4]

Problem

extrachill-app already exists, but current main is an authenticated shell with a placeholder Feed. Calendar, event details, Going, My Shows, Local Scene, push handling, native deep-link routing, and app analytics are not implemented in the app.

Broad app issues track search (#3), push (#11), and deep links (#13), but none owns a bounded native live-music beta.

Product outcome

Compose existing Events and Users products into the app's first measurable fan loop:

Local Scene -> Tonight/This Weekend -> event detail -> Going -> My Shows -> relevant return

This issue owns app composition and release boundaries, not backend event or notification policy.

Verified app foundation

• Expo/React Native app exists.
• wp-native-shell and wp-native-client own auth/navigation/ability execution.
• App is currently authenticated-only by plan and AuthGate behavior.
• Custom URL scheme exists, but native event routing does not.
• App push dependencies/device registration do not exist.
• No app analytics contract exists.

Workstreams

1. Native Events home

• Saved Local Scene.
• Tonight and This Weekend.
• Near Me only after location permission, denial, and fallback behavior are scoped.

2. Native event detail

• Canonical title, venue/location, date/time, ticket browser exit, and relevant artist/venue links.
• Going/Check In/I Was There through the existing attendance contract.
• Explicit native-versus-browser boundaries.

3. Native My Shows

• Upcoming and past owner views.
• Owner-only upcoming behavior.
• Clear stale/offline/error semantics.

4. Local Scene and consent

• Save Local Scene through Users.
• Keep Local Scene save, email digest opt-in, and mobile push permission as separate actions.

5. Bounded push and deep-link slice

• Depend on [APP] Implement push notification system and management #11 for device registration/channel consent.
• Depend on [APP] Add deep linking support for external URLs and notifications #13 for event URL routing.
• Consume Events #484 policy; do not invent app-owned event-alert rules.

6. Authentication decision

• Default this beta to the existing authenticated-only architecture.
• Any guest discovery requires a separate explicit change to AuthGate/product policy and is not assumed here.

7. Instrumentation

• Define privacy-safe mobile events for event view, Going, My Shows revisit, Local Scene, push receipt/open, and return.
• Define analytics owner, anonymous/authenticated behavior, and cross-native attribution before setting a success threshold.

Dependencies

• Events #269 current web/product/privacy contract.
• Users #87 owner-only upcoming attendance and return-loop policy.
• Events #484 alert-quality policy.
• App [APP] Implement push notification system and management #11 and [APP] Add deep linking support for external URLs and notifications #13 bounded implementation slices.

Non-goals

• No requirement to ship every network feature before testing this loop.
• No follower graph.
• No app-store release without explicit operator authorization.