feat(followed-ui): add Followed page with movies & series view

[gery25]

feat(followed-ui): add Followed page with movies & series view

Summary

Implemented a new “Followed” section in the user profile that allows users to view both movies and series they are following. The UI follows the same design pattern as the existing History view, and the backend now supports fetching the favorite movies and series from the user profile.

Changes

File	Description
users/templates/users/parts/followed.html	New template displaying movies and series in a responsive grid, with an empty‑state message.
users/views.py	Added followed view that retrieves favorite_movies and favorite_series from the user's profile and renders the new template.
users/urls.py	Added URL pattern user/followed (name='followed').
users/templates/users/types/user_client.html	Added a navigation tab Followed to the profile sidebar.
web_app/models.py	Added location field to CustomUser and favorite_series ManyToMany field to UserProfile.
web_app/forms.py	Updated CustomUserChangeForm to include bio and location fields.
users/templates/users/profile/profile.html	Added UI fields for editing Biography and Location.
users/templates/users/settings/user_settings.html	Updated sidebar cards to display actual bio and location values when set.
Migrations	Generated 0003_customuser_location_userprofile_favorite_series.py to apply the new model fields.
CSS / static files	Existing styles apply automatically; no additional CSS required.

Why

• Gives users a dedicated place to track movies and series they are interested in, improving engagement.
• Keeps UI consistency with the existing profile layout.
• Extends the user model to store location and biography, enhancing personalization.

Testing Steps

1. Run migrations: python manage.py migrate.
2. Create a user, set Bio, Location, and add some movies/series to the profile (via admin or existing UI).
3. Log in and navigate to Profile → Followed.
4. Verify that favorite movies and series appear in a responsive grid.
5. Ensure the empty‑state message shows when no items are followed.
6. Confirm that the Biography and Location fields are editable and saved correctly.

Related Issues / References

• Builds on previous profile UI enhancements and the existing history view.
• No open issues remain; ready for review and merge.