Miler rider app: surface system, visible design language, backend lifecycle

Design system
- MilerSurface ladder (canvas → working → raised → floating) with MilerPanel
  as layer 1; canvas moved to #DEE3EA so white separates at 1.290:1.
- Visible vocabulary applied across Home, Deliveries, Activity, Account and
  the sheets: hero heads (tabular numeral + small caption, clamped at 1.3x),
  canvas wells for anything that opens, small filled tags for shelf labels,
  demoted placeholders. Recorded in DESIGN_SYSTEM.md §6.
- One icon family: 222 Material glyphs migrated to Lucide; none left outside
  lib/xpress.
- Colour semantics corrected: amber only for what is genuinely owed, brand red
  reserved for the live stop, disabled primaries go neutral rather than pale.

Data and lifecycle
- lib/data/lifecycle.dart reads mutations for what they prove; route_order.dart
  makes admin sequence the single ordering authority; service_day.dart, and
  stop_area.dart rewritten against live Coimbatore addresses (digit-token
  stripping, city stoplist, street suffixes, stammer collapse).
- countLabel states the load once, in bags.

Testing
- 1440 tests passing; golden shot harnesses for Home, Deliveries, Activity,
  sheets and verify, with test/failures/ now gitignored (diff debris).
- New pins: home_gutter_test, stop_area_test, plus updated structural bounds.

Note: this commit also carries pre-existing working-tree deletions that were
present before this work (API_SPEC.md, README.md, demo test fixtures).

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

lib/views/helpers/widgets/page_transitions.dart

@@ -257,7 +257,22 @@ Future<T?> showAppDialog<T>({
     barrierColor: barrierColor,
     useRootNavigator: useRootNavigator,
     transitionDuration: const Duration(milliseconds: 260),
-    pageBuilder: (context, _, _) => Builder(builder: builder),
+    // ── Every dialog gets a Material, whether its caller remembered one ──
+    //
+    // `showGeneralDialog` hands the builder a bare route with no Material in
+    // scope, unlike `showDialog`, which wraps its child in one. A caller that
+    // returns a `Container` with a `Text` in it — which several do — therefore
+    // painted Flutter's **missing-Material debug marker**: the yellow double
+    // underline under every word. It looked like a styling bug in the dialog
+    // and was actually the framework saying "there is no Material here".
+    //
+    // `MaterialType.transparency` adds the ancestor and paints nothing, so a
+    // dialog that draws its own surface is unchanged and one that forgot stops
+    // being underlined.
+    pageBuilder: (context, _, _) => Material(
+      type: MaterialType.transparency,
+      child: Builder(builder: builder),
+    ),
     transitionBuilder: (context, animation, _, child) {
       // `drive` rather than a `CurvedAnimation`: this builder runs every frame
       // of the transition, and a CurvedAnimation built here would be a new