…hema, tests)

FIXES #27: Fix compile-time error in FeedRepository.updatePost payload construction
- Replace invalid map entry syntax with proper conditional keys
- Only include optional fields when non-null and non-empty
- flutter analyze now passes without errors

FIXES #28: Auth: Make profile upsert on signup fatal
- Profile creation failures now block signup completion
- User-friendly error message displayed on failure
- Auth cleanup (signOut) called if profile creation fails

FIXES #38: Routing hardening - validate path/query params
- Create safe_route_params.dart with helpers for parameter extraction
- InvalidRouteErrorScreen for missing parameters
- Apply safe extraction to all 9 routes with path parameters
- Prevent crashes from malformed deep links

FIXES #31: Version-control Supabase schema with migrations
- Add supabase/config.toml for CLI configuration
- Create supabase/.env.local.example template
- Add comprehensive MIGRATIONS.md workflow guide
- Add supabase/README.md for setup and common operations
- Add .gitignore for local env files and secrets
- Schema now fully reproducible from git migrations/

FIXES #30: Testing foundation - unit tests for models
- Add PetModel tests: JSON roundtrip, copyWith, null handling
- Add UserModel tests: JSON serialization, copyWith
- Create TEST_GUIDE.md with testing best practices
- Add GitHub Actions workflow for CI (test-and-build.yml)
  - Runs flutter analyze and flutter test
  - Builds Android APK and iOS app
  - Validates schema migrations
  - Uploads coverage to Codecov

Test Coverage Baseline:
✅ PetModel: 8 tests (JSON parsing, serialization, copyWith)
✅ UserModel: 5 tests (JSON parsing, serialization, copyWith)
✅ All tests passing with 0 failures

CI/CD Pipeline:
✅ Tests run on push to main/develop/feature branches
✅ Tests run on PRs to main/develop
✅ Build validation for Android and iOS
✅ Schema migrations validation
✅ Coverage reporting to Codecov

Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>

Introduce offline support and health improvements: adds OfflineCache (SharedPreferences-backed cache, TTLs, sync queue), ConnectivityService (status stream, test toggles), Riverpod connectivity providers, and offline repository wrappers for feed, marketplace, and health (cache-first reads, queued writes, TTLs). Also includes health utilities (dose scheduling, reminders, metrics), docs (OFFLINE_SUPPORT.md, IMPLEMENTATION_STATUS.md), and basic controller tests (auth, cart). .claude settings updated with Supabase plugin commands. Notes: queue format and TTL strategy implemented; sync trigger on connectivity restoration is scaffolded (TODO: wire actual sync trigger/integration).

Add Stripe-based checkout and per-user cart persistence plus push-deeplink handling.

Highlights:
- Stripe: add flutter_stripe dependency, initialize publishable key in main, and switch Android activity to FlutterFragmentActivity to support Stripe PaymentSheet.
- Server: add a Supabase Edge Function (create-payment-intent) to create Stripe PaymentIntents and a DB migration to add payment fields to orders (payment_provider, payment_intent_id, payment_status).
- Marketplace repo: new CreatePaymentIntentResult, createStripePaymentIntent() to call the edge function, and payment-aware placeOrder() plus stock validation and out-of-stock errors.
- Cart: CartController persists cart per authenticated user to SharedPreferences (debounced), loads/clears on auth changes, and integrates Stripe PaymentSheet into the checkout flow; CartItemModel and ProductModel gains JSON serialization helpers.
- Push notifications: add push_deeplink_routes helper, wire notification-opened handler in PushNotificationCoordinator, and implement registerOnNotificationOpenedHandler in PushNotificationService to route users into the app on notification taps.
- Build/config: update pubspec.yaml/lock for flutter_stripe, tweak android/gradle.properties for JDK/tooling and Kotlin incremental compile, and adjust Supabase CLI config and functions config for the new edge function.

These changes enable on-device checkout with server-side PaymentIntent creation, persist carts across sessions per user, and deep-link users from notifications into the appropriate screens.

Manage realtime lifecycle and optimize follower queries, plus tighten Supabase debug fallback and update docs.

- controllers/chat_controller.dart: added PetModel import; ensure realtime messages channel is unsubscribed and nulled on dispose and when active pet changes; listen to activePetProvider to load threads or reset ChatState, avoiding leaked channels and stale state.
- controllers/feed_controller.dart: replace ad-hoc fetch/subscription logic with an authProvider listener that disposes/resubscribes like/comment channels on logout/login, triggers fetchPosts on user change, and returns a clean unauthenticated FeedState to prevent duplicate realtime subscriptions.
- repositories/follow_repository.dart: use server-side count() for scalar follower/following counts; introduce fetchPetFollowerCounts to batch pet owner lookups and follower queries, deduplicate owner vs pet followers, and eliminate N+1/full-table scan patterns.
- utils/supabase_config.dart: add SUPABASE_ALLOW_EMBEDDED_DEBUG_FALLBACK dart-define (default true) and fail fast in non-release builds when fallbacks are disabled, improving security hygiene; provide clearer error messages for missing env defines.
- docs: update architecture and feature-practices docs with a May 7, 2026 implementation/status snapshot reflecting shipped fixes and remaining open items.

These changes reduce realtime duplication/leaks, improve follower-count performance, and harden local/release Supabase configuration.

Switch Android app themes to Theme.MaterialComponents.DayNight.NoActionBar (values and values-night) so native UI (flutter_stripe PaymentSheet) works correctly; set windowBackground and navigationBarColor to use existing splash resources. Add com.google.android.material:material:1.12.0 to android/app/build.gradle.kts so Material attributes resolve. Also add docs/cursor_completed_issue_numbers_from_github.md (exported session notes) for bookkeeping.

Adds a large set of feature-focused controllers, data models, and repositories plus related view/route and pubspec updates. Key additions:
- New controllers/providers: gear_reviews, knowledge_base, pet_breed (breed identifier + history), pet_events, pet_insurance, pet_memorial, pet_nutrition, pet_sitter, pet_training and related providers.
- New models: GearReview, KnowledgeArticle, PetEvent, PetFriendlyPlace, PetMemorialEntry and others used by feature repos.
- New repositories: adoption, community_group, and a consolidated feature_repositories (training, nutrition, gear reviews, memorials, etc.) backed by Supabase utilities.
- HealthController enhancements: include upcomingAppointments in state, overdue appointment counting, and an idempotent 30-day medication dose generation flow (times/frequency helpers and repo call). Also triggers dose regeneration when medications change.
- PetController updates: photo removal method (storage cleanup + DB clear) and a breed suggestions provider for autocomplete.
- Added docs: remaining_issues_plan.md and analysis_results.txt.
- Misc: multiple view files, routes, and package files updated to wire in new features.

These changes implement many previously-mocked/stubbed features (events, groups, adoption, nutrition, training, gear reviews, memorials, breed ID) and improve health/medication handling and pet media management.

Revamp CI: simplify permissions, pin actions, update Java/Flutter versions, add formatting check, use Codecov token, rename jobs, add conditional Android/iOS builds, upload artifacts with new names, and add CodeQL security scan.

App fixes/refactors: initialize OfflineCache in main; switch connectivity provider to a broadcast stream and update isOnline/isOffline providers; add missing toJson() implementations for PetModel and PostModel; small OFFLINE_SUPPORT fix (add breaks in switch); remove memorial gallery UI; simplify medication logic to count unique upcoming days and adjust overdue calculation; clarify auth_repository cleanup with comment/TODO about using an Edge Function to delete users; sanitize supabase .env example keys to placeholders.

Bump pinned GitHub Actions used in .github/workflows/test-and-build.yml to newer commits/releases for bug fixes and improvements. Updated actions/checkout (v4.1.1 -> v4.2.2), actions/setup-java (v3.13.0 -> v4.4.0), subosito/flutter-action (v2.12.0 -> v2.16.0), codecov/codecov-action (v3.1.4 -> v4.6.0), actions/upload-artifact (v4.1.0 -> v4.4.3), and github/codeql-action (init/analyze v3.25.3 -> v3.27.6). These are SHA-pinned updates in the workflow file; no functional workflow changes beyond the action upgrades are introduced.