feat: fix auth, provider health checks, search, and redesign UI

- Fix register/login: dict-style access on UserTable ORM objects
- Fix HTMX auth: inject JWT token in all HTMX request headers
- Fix FS7 search: use DLE AJAX endpoint /engine/ajax/search.php
- Fix ZT search: use ?p=series&search=QUERY (not DLE format)
- Fix provider health: load hardcoded providers + domain manager
- Add self.id to all anime/series providers
- Redesign homepage: Netflix-style horizontal scroll cards (.hc)
- Redesign search results: grouped by title, poster + synopsis + 3 buttons
- Add Télécharger dropdown: season download + episode picker
- Fix navbar CSS: restore .tabs flex layout, remove orphan rules
- Fix HTMX spinner: remove inline display:none, use CSS indicator
- Add AGENTS.md files across project for developer documentation

tests/AGENTS.md

@@ -1,38 +1,35 @@
 # AGENTS.md - Test Suite
 
 ## OVERVIEW
-
-Pytest test suite for Ohm Stream Downloader with 18 test files covering unit and integration tests.
+Pytest suite: 18+ test files, 5000+ lines. Auto-marked (unit/integration/asyncio) + manual markers (slow/network).
 
 ## STRUCTURE
-
 ```
 tests/
-├── conftest.py              # Fixtures & pytest config
-├── test_*.py                # 18 test modules
-├── test_api.py              # FastAPI endpoints (integration)
-├── test_auth.py             # JWT authentication
-├── test_download_manager.py # Download queue management
-├── test_downloaders.py     # Provider downloaders
-├── test_anime_sama_*.py    # Anime-Sama provider variants
-├── test_favorites.py        # Favorites management
-├── test_french_manga.py     # French-Manga provider
-├── test_models.py           # Pydantic model validation
-├── test_sonarr.py           # Sonarr webhook integration
-├── test_utils.py            # Utility functions
-├── test_watchlist.py        # Auto-download watchlist
-├── test_metadata_enrichment.py
-├── test_translate_api.py
-├── test_delete_and_restore.py
+├── conftest.py              # 301 lines: fixtures, markers, DB isolation, event loop
+├── e2e/                     # Playwright end-to-end tests
+├── test_api.py              # 627 lines — FastAPI endpoints (auto integration)
+├── test_favorites.py        # 564 lines — Favorites CRUD
+├── test_sonarr.py           # 513 lines — Sonarr webhook
+├── test_metadata_enrichment.py  # 442 lines — Kitsu API
+├── test_download_manager.py # 395 lines — Download queue
+├── test_downloaders.py      # 341 lines — Provider scrapers
+├── test_models.py           # 321 lines — Pydantic models
+├── test_utils.py            # 246 lines — sanitize_filename, is_safe_filename
+└── test_watchlist.py        # 178 lines — Auto-download watchlist
 ```
 
+**Root-level tests** (legacy placement, NOT in tests/):
+- `test_watchlist_simple.py`, `test_watchlist_e2e.py` — should be moved to tests/
+
 ## WHERE TO LOOK
 
 | Need | File |
 |------|------|
-| Run all tests | `pytest` |
-| Unit tests only | `pytest -m "unit"` |
-| Integration tests | `pytest -m "integration"` (test_api.py auto-marked) |
+| All tests | `pytest` |
+| Unit only | `pytest -m "unit"` |
+| Integration only | `pytest -m "integration"` (test_api.py auto-marked) |
+| Skip slow | `pytest -m "not slow"` |
 | Download logic | `test_download_manager.py`, `test_downloaders.py` |
 | API endpoints | `test_api.py` |
 | Provider scrapers | `test_anime_sama_*.py`, `test_french_manga.py` |
@@ -40,25 +37,20 @@ tests/
 ## CONVENTIONS
 
 **Markers** (auto-applied unless manual):
-- `unit` - Default for non-api tests
-- `integration` - test_api.py only
-- `asyncio` - Auto-detected from coroutine functions
-- `slow` - Manual: `@pytest.mark.slow`
-- `network` - Manual: `@pytest.mark.network`
+- `unit` — Default for non-api tests
+- `integration` — test_api.py only
+- `asyncio` — Auto-detected from coroutine functions
+- `slow` — Manual: `@pytest.mark.slow`
+- `network` — Manual: `@pytest.mark.network`
 
-**Naming**:
-- Files: `test_*.py`
-- Classes: `Test*` (e.g., `class TestSanitizeFilename:`)
-- Functions: `test_*` (e.g., `def test_sanitize_simple_filename(self):`)
+**DB isolation**: `conftest.py` forces `DATABASE_URL=sqlite://` in-memory. Tables auto-drop/recreate per test.
 
-**Fixtures** (in conftest.py):
-- `temp_dir` - Temporary directory (auto-cleanup)
-- `temp_download_dir` - Download folder
-- `sample_download_task` - DownloadTask instance
-- `mock_httpx_client` - Mocked AsyncClient
-- `download_manager` - Pre-configured DownloadManager
+**Naming**: Files `test_*.py`, classes `Test*`, functions `test_*`.
 
-**Run commands**:
-- `pytest` - All tests with coverage
-- `pytest -m "not slow"` - Skip slow tests
-- `pytest --cov=app --cov-report=html` - HTML coverage report
+**Config**: `pytest.ini` — asyncio_mode=auto, timeout=300s, coverage on app/.
+
+## ANTI-PATTERNS
+
+- Do NOT add network-dependent tests without `@pytest.mark.network`
+- Do NOT add slow tests without `@pytest.mark.slow`
+- Empty `except:` in `test_api.py:429,451` and `test_download_manager.py:357` — known tech debt