chore: apply pending code updates

docs/instructions.md

@@ -101,26 +101,20 @@ conda run -n AniWorld python -m uvicorn src.server.fastapi_app:app --host 127.0.
 
 For each task completed:
 
-- [x] Implementation follows coding standards
-- [x] Unit tests written and passing
-- [x] Integration tests passing
-- [x] Documentation updated
-- [x] Error handling implemented
-- [x] Logging added
-- [x] Security considerations addressed
-- [x] Performance validated
-- [x] Code reviewed
-- [x] Task marked as complete in instructions.md
-- [x] Infrastructure.md updated and other docs
-- [x] Changes committed to git; keep your messages in git short and clear
-- [x] Take the next task
+- [ ] Implementation follows coding standards
+- [ ] Unit tests written and passing
+- [ ] Integration tests passing
+- [ ] Documentation updated
+- [ ] Error handling implemented
+- [ ] Logging added
+- [ ] Security considerations addressed
+- [ ] Performance validated
+- [ ] Code reviewed
+- [ ] Task marked as complete in instructions.md
+- [ ] Infrastructure.md updated and other docs
+- [ ] Changes committed to git; keep your messages in git short and clear
+- [ ] Take the next task
 
 ---
 
 ## TODO List:
-
-- [x] Add a UI option to show series that have **no episodes downloaded** (i.e., series present in the library but with zero episodes). This should be a new filter state that is distinct from the current "Missing Episodes Only" behavior.
-- [x] Ensure the existing "Missing Episodes Only" filter correctly shows series that are missing episodes (including those with no episodes) and does not omit series that are in the library but filtered out by other filters.
-- [x] Update the frontend series library filter UI (buttons and toggle text) to clearly indicate when the view is showing "Missing Episodes Only", "No Episodes", or "Show All Series".
-- [x] Update `docs/features.md` to document the new filter behavior and any new UI options.
-- [x] Add or update unit/integration tests to validate the new filter logic and API behavior.