🔍 Add Filter and Sort Options

[safayavatsal]

Problem

No way to filter or sort anime lists. Users can't find content easily.

Solution

1. Add filter options (by genre, status, rating, type, year)
2. Add sort options (alphabetical, by rating, by popularity, by date added, recently watched)
3. Add filter UI to relevant pages
4. Persist filter preferences
5. Show active filter count

Estimated Effort

5 hours

Priority

Low - Quality of life feature

Labels

priority:low, type:feature, effort:medium