The tab bar drops from five to four; Tags now opens as a sheet from the + in the library's filter strip, which is the control that was already about adding a tag. Picking a tag pins it as a filter tab rather than pushing to a separate per-tag list. That made TagBookmarksView redundant — the filter tab shows the same thing, in whichever layout you're already using — so it's gone. This also fixes what the + could reach. The old inline menu listed tags found on the loaded page, so it offered 21 of 96 tags, and once a tag filter was active it collapsed to just the tags co-occurring with that one — pinning a second unrelated tag was impossible. The sheet sources names from the tags endpoint via a new BookmarksViewModel.loadAllTags(), and counts still come from loaded bookmarks, so a tag we haven't paged in shows no number rather than a wrong one. The sheet is searchable, marks already-pinned tags with a check, and picking a pinned tag selects that tab instead of duplicating it. Verified by driving the UI: the tab bar is now Bookmarks/Sources/ Podcasts/Search, + opens the sheet with 42 rows where the old menu had 21, and picking "ai" pinned an "ai" tab. Suite passes. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01JgLHztZGaEHvS3KNeGQmRM