fix: migrations, auth, providers health check, E2E tests, remove neko-sama

- Add proper Alembic initial migration (0001_initial_schema.py)
- Migrate refresh tokens from JSON file to SQLite (RefreshTokenTable)
- Remove Neko-Sama provider entirely (redirects to Gupy, not a host)
- Fix provider health check always showing UNKNOWN
  - Run check_all_health() on startup
  - Fix POST /providers/health/check background task bug
  - Add HTMX refresh after manual health check trigger
- Fix anime search relevance scoring with MIN_RELEVANCE_THRESHOLD=0.5
- Replace bare 'except:' with 'except Exception:' across codebase
- Add Playwright E2E test suite (12 tests, auth setup, helpers)
- Fix toast container blocking clicks via pointer-events: none
- Remove obsolete Jest/Vite test files and config
- Clean up obsolete test_watchlist scripts
- Update sonarr model comment for active providers

app/downloaders/video_players/lpayer.py

@@ -102,7 +102,7 @@ class LpayerDownloader(BaseVideoPlayer):
                 try:
                     await page.mouse.click(640, 360)
                     await asyncio.sleep(3)
-                except:
+                except Exception:
                     pass
 
                 # Try JavaScript extraction to find video URLs in DOM
@@ -235,7 +235,7 @@ class LpayerDownloader(BaseVideoPlayer):
             if browser:
                 try:
                     await browser.close()
-                except:
+                except Exception:
                     pass
         """Extract video URL using Playwright to render JavaScript"""
         try: