Adds a clickable info icon next to the "For You" title that displays a popover explaining the feed's filtering logic ("Most Recent Video - Disinterests Tags - Watch History + Interests Tags"). Implemented as a reusable helper `attachFeedInfoPopover` in `js/ui/components/FeedInfoPopover.js` to support future use on other feed pages. Updated `views/for-you.html` and `js/forYouView.js` to integrate the new component. Verified with Playwright.
- Updated `For You` page to rely on feed engine filtering for tag preferences.
- Removed the `recentVideoTags` HTML element from `views/for-you.html`.
- Updated `js/app.js` and `js/ui/videoListViewController.js` to optionally skip finding the `recentVideoTags` element.
- Updated `loadForYouVideos` in `js/app.js` to explicitly skip `recentVideoTags`.
- Confirmed feed logic via `tests/feed-engine/tag-preference-filter.test.mjs`.
- Verified UI changes via Playwright.