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

main.py

@@ -5,6 +5,7 @@ Main application file with startup configuration and middleware.
 All API routes have been migrated to app/routers/ for better maintainability.
 """
 
+import asyncio
 import logging
 import uuid
 from datetime import datetime
@@ -42,6 +43,8 @@ app.add_middleware(
         "http://192.168.1.204",
         "http://192.168.1.200:3000",
         "http://192.168.1.200",
+        "http://192.168.5.127:3000",
+        "http://192.168.5.127",
     ],
     allow_credentials=True,
     allow_methods=["GET", "POST", "PUT", "DELETE", "PATCH", "OPTIONS"],
@@ -82,6 +85,11 @@ async def startup_event():
     from app.auto_download_scheduler import auto_download_scheduler
 
     auto_download_scheduler.start()
+
+    # Run initial provider health check in background
+    from app.providers_manager import providers_manager
+
+    asyncio.create_task(providers_manager.check_all_health())
     logger.info("Application started: Sonarr handler and scheduler initialized")