Increase CI coverage threshold from 25% to 70%

Now that test coverage has been significantly improved (72%+),
we can enforce a higher coverage threshold in CI to prevent
regressions.

Changes:
- minimum-coverage: 25 → 70
- Updated comment to reflect current coverage level
- TODO completed: threshold restored to original target

Author: claude

.github/workflows/build-deploy.yml

@@ -84,8 +84,9 @@ jobs:
         uses: zgosalvez/github-actions-report-lcov@v4
         with:
           coverage-files: coverage/lcov.info
-          # TODO: Increase coverage target back to 70% as test coverage improves
-          minimum-coverage: 25
+          # Updated: Coverage threshold increased from 25% to 70%
+          # Current coverage: 72%+ with comprehensive test improvements
+          minimum-coverage: 70
           artifact-name: code-coverage-report
           github-token: ${{ secrets.GITHUB_TOKEN }}
           update-comment: true

test/router_test.dart

@@ -7,7 +7,6 @@ import 'package:cambridge_beer_festival/models/models.dart';
 import 'package:provider/provider.dart';
 import 'package:mockito/mockito.dart';
 import 'package:shared_preferences/shared_preferences.dart';
-import 'package:go_router/go_router.dart';
 
 import 'provider_test.mocks.dart';