feat: flat design Sunset Glitch + download manager + settings + recommendations overhaul

- Sunset Glitch color palette applied to all templates
- Font Awesome icons throughout UI
- Download manager with parallel queue and progress tracking
- Settings page with dynamic configuration
- Recommendations router enhanced with scoring
- Local vendor libs (Alpine.js, HTMX) for offline support
- Auto test suite with screenshots
- Series releases list component
- New download model

app/watchlist.py

@@ -216,8 +216,12 @@ class WatchlistManager:
     update_check_time = update_last_checked
 
     def get_due_items(self) -> List[WatchlistItem]:
+        """Get all items that are due for a check based on current settings"""
+        return self.get_due_for_check(self.settings.check_interval_hours if self.settings else 6)
+
+    def get_due_for_check(self, interval_hours: int) -> List[WatchlistItem]:
         """Get all items that are due for a check based on settings"""
-        interval = timedelta(hours=self.settings.check_interval_hours)
+        interval = timedelta(hours=interval_hours)
         now = datetime.now()
         
         with Session(engine) as session:
@@ -234,6 +238,12 @@ class WatchlistManager:
             
             return due_items
 
+    def get_settings(self) -> WatchlistSettings:
+        """Get global watchlist settings"""
+        if self.settings is None:
+            self._load_settings()
+        return self.settings
+
     def update_settings(self, settings: WatchlistSettings) -> WatchlistSettings:
         """Update global watchlist settings"""
         self.settings = settings