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>

test/assignment_lookup_test.dart

@@ -3,11 +3,7 @@ import 'package:miler/data/assignment_lookup.dart';
 
 /// Rows shaped like GET /miler/assignments (models.BookingAssignment), which the
 /// backend returns ordered by assignedat DESC.
-Map<String, dynamic> row(
-  int assignmentId,
-  dynamic bookingId,
-  String status,
-) =>
+Map<String, dynamic> row(int assignmentId, dynamic bookingId, String status) =>
     <String, dynamic>{
       'bookingassignmentid': assignmentId,
       'bookingid': bookingId,
@@ -55,15 +51,17 @@ void main() {
       expect(index['9'], 9020);
     });
 
-    test('treats Accepted as live so re-accept resolves the same assignment',
-        () {
-      final index = AssignmentLookup.buildIndex([
-        row(9031, 11, 'Cancelled'),
-        row(9030, 11, 'Accepted'),
-      ]);
+    test(
+      'treats Accepted as live so re-accept resolves the same assignment',
+      () {
+        final index = AssignmentLookup.buildIndex([
+          row(9031, 11, 'Cancelled'),
+          row(9030, 11, 'Accepted'),
+        ]);
 
-      expect(index['11'], 9030);
-    });
+        expect(index['11'], 9030);
+      },
+    );
 
     test('normalises int and string booking ids to the same key', () {
       final index = AssignmentLookup.buildIndex([
@@ -81,28 +79,31 @@ void main() {
           'bookingassignmentid': '9050',
           'bookingid': 14,
           'assignmentstatus': 'Assigned',
-        }
+        },
       ]);
 
       expect(index['14'], 9050);
     });
 
-    test('skips rows missing either id rather than mapping them to garbage', () {
-      final index = AssignmentLookup.buildIndex([
-        <String, dynamic>{'bookingid': 15, 'assignmentstatus': 'Assigned'},
-        <String, dynamic>{
-          'bookingassignmentid': 9060,
-          'assignmentstatus': 'Assigned'
-        },
-        <String, dynamic>{
-          'bookingassignmentid': null,
-          'bookingid': null,
-          'assignmentstatus': 'Assigned'
-        },
-      ]);
+    test(
+      'skips rows missing either id rather than mapping them to garbage',
+      () {
+        final index = AssignmentLookup.buildIndex([
+          <String, dynamic>{'bookingid': 15, 'assignmentstatus': 'Assigned'},
+          <String, dynamic>{
+            'bookingassignmentid': 9060,
+            'assignmentstatus': 'Assigned',
+          },
+          <String, dynamic>{
+            'bookingassignmentid': null,
+            'bookingid': null,
+            'assignmentstatus': 'Assigned',
+          },
+        ]);
 
-      expect(index, isEmpty);
-    });
+        expect(index, isEmpty);
+      },
+    );
 
     test('ignores non-map entries', () {
       final index = AssignmentLookup.buildIndex([