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UI-02: animated skeleton map when tiles can't be fetched

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Adds MapConnectivityState, a shared tracker of tile-fetch outcomes (cache
miss + network failure) that flips every map into an animated skeleton
after 3 consecutive failures and recovers on a single success -- either an
ordinary fetch succeeding, or (once TileLayer has been fully unmounted in
skeleton mode) a periodic single-tile probe every 15s. Detected at the
fetch level rather than via an OS connectivity API, since a captive portal
or degraded connection can report "online" while every real fetch times
out.

SkeletonMapLayer reuses the Stitch exports' 40px grid-overlay treatment
with a shimmer sweep, replacing TileLayer entirely (never fetching
underneath its own placeholder) while markers/polylines keep rendering
since they come from local data. RideMap and the route planner's
independent FlutterMap both wire this in via a plain skeletonMode bool.

Moved the tile-source constants into a new tiles/tile_config.dart so the
connectivity probe (in the app-layer composition root) doesn't need to
import from ui/ to build its request URL.

Verified end-to-end on a real emulator: cut network, cleared the tile
cache, confirmed the skeleton renders after real fetch failures, then
confirmed automatic recovery within one probe interval once network
returned -- not just via the widget/unit tests that also cover this.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_012Xki7YAcc2TiN2PRZJ2tXr
This commit is contained in:
uhryniuk
2026-08-23 20:07:47 -05:00
parent d3974eb4e1
commit 10040e6985
13 changed files with 580 additions and 38 deletions
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docs/ui-redesign/README.md
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@@ -20,7 +20,7 @@ v3 held to.
| # | Ticket | Size | Depends on | Status |
|---|---|---|---|---|
| [UI-01](UI-01-tab-shell-background-map.md) | Persistent tab shell with an always-visible background map | L | — | Done |
| [UI-02](UI-02-offline-skeleton-map.md) | Offline / no-connection skeleton map | S | UI-01 | Not started |
| [UI-02](UI-02-offline-skeleton-map.md) | Offline / no-connection skeleton map | S | UI-01 | Done |
| [UI-03](UI-03-glass-component-kit.md) | Shared floating-glass component kit | M | UI-08 | Not started |
| [UI-04](UI-04-customizable-hud-widgets.md) | Customizable HUD telemetry widgets (drag, resize, visibility toggle) | L | UI-03 | Not started |
| [UI-05](UI-05-map-hud-record-screen.md) | Map HUD: Record screen redesign | M | UI-01, UI-03, UI-04 | Not started |