docs(quick-17): complete playlist subpage refactoring

- Summary documenting playlist-details creation and playlist-view simplification
- Updated STATE.md with quick task 17 completion

.planning/STATE.md

@@ -110,6 +110,7 @@ Decisions from v1.0 are archived in PROJECT.md Key Decisions table. Key patterns
 | # | Description | Date | Commit | Directory |
 |---|-------------|------|--------|-----------|
 | 16 | add ctrl+a hotkey to multi-select views to select all items | 2026-03-07 | 043c74c | [16-add-ctrl-a-hotkey-to-multi-select-views-](./quick/16-add-ctrl-a-hotkey-to-multi-select-views-/) |
+| 17 | refactor playlist view to use subpages | 2026-03-08 | 955cd68 | [17-refactor-playlist-view-to-use-subpages-l](./quick/17-refactor-playlist-view-to-use-subpages-l/) |
 
-Last activity: 2026-03-07 - Completed quick task 16: add ctrl+a hotkey to multi-select views to select all items
-*Last updated: 2026-03-07*
+Last activity: 2026-03-08 - Completed quick task 17: refactor playlist view to use subpages
+*Last updated: 2026-03-08*

.planning/quick/17-refactor-playlist-view-to-use-subpages-l/17-SUMMARY.md

@@ -0,0 +1,81 @@
+---
+phase: quick-17
+plan: 1
+subsystem: frontend/playlist
+tags: [refactor, navigation, ux-consistency]
+dependency-graph:
+  requires: []
+  provides: [playlist-details-component, playlist-subpage-navigation]
+  affects: [playlist-view, index-routing, search-store]
+tech-stack:
+  added: []
+  patterns: [subpage-navigation, detail-view-with-back-button]
+key-files:
+  created:
+    - frontend/src/components/playlist-details/playlist-details.ts
+  modified:
+    - frontend/src/components/playlist-view/playlist-view.ts
+    - frontend/index.ts
+    - frontend/src/store/search-store.ts
+decisions:
+  - Playlist-details is a standalone component (not reusing track-list) to preserve playlist-specific interactions (phantom handling, playlist-scoped drag, remove from playlist)
+  - Search filtering in playlist-details filters by track title/artist; playlist-view now only filters by playlist name
+metrics:
+  duration: 6 min
+  completed: "2026-03-08T03:10:34Z"
+---
+
+# Quick Task 17: Refactor Playlist View to Use Subpages Summary
+
+Refactored playlist navigation from expand/collapse inline pattern to dedicated subpage navigation, matching genre-details and artist-details UX patterns.
+
+## Completed Tasks
+
+| # | Task | Commit | Key Changes |
+|---|------|--------|-------------|
+| 1 | Create playlist-details component | dc5c7d6 | New `playlist-details` component with header (back button, list icon, title, track count), full track list with all interactions, context menus, drag support, search filtering, routing in index.ts |
+| 2 | Simplify playlist-view to navigate | 955cd68 | Removed inline track expansion, chevrons, track-level interactions. Plain click navigates to playlist-details. Kept playlist management (create, import, rename, delete, sort, drag-drop target) |
+
+## What Changed
+
+### New: `playlist-details` component
+- Header with back button, 80x80 playlist avatar (list icon), playlist name, track count
+- Full track list with all interactions from the old inline expansion:
+  - Click to select, double-click to play, right-click context menu
+  - Drag tracks to queue or other playlists
+  - Phantom track handling (locate, remove, phantom-resolver dialog)
+  - Track details dialog, duplicate tracks dialog
+- Drop target for adding tracks from other views
+- Search filtering (tracks by title/artist)
+- Select-all (Ctrl+A) support
+- Listens for `PlaylistTracksChanged` and `PlaylistDeleted` events
+
+### Simplified: `playlist-view` component
+- Removed ~1300 lines of inline track expansion code
+- Plain click dispatches `navigate` event with `playlist-details` view
+- Ctrl/Shift+Click still multi-selects playlists for bulk operations
+- Right-click context menu still works (rename, delete, set-default)
+- Drag-drop onto playlist items still adds tracks
+- Create/import playlist still works
+- Sort toolbar still works
+- Search now filters by playlist name only (no inline track search)
+- Removed: `SelectionController`, `ContextMenuController`, `PlayerController`, track-info, track-details, phantom-resolver imports
+
+### Updated: `index.ts` routing
+- Added `playlist-details` case to navigation switch
+- Passes `playlistId` and `playlistName` as element attributes
+
+### Updated: `search-store.ts`
+- Added `playlist-details` to `SEARCHABLE_VIEWS`
+
+## Deviations from Plan
+
+None - plan executed exactly as written.
+
+## Verification
+
+- `npx tsc --noEmit` passes with no errors
+- Pre-commit hook (frontend-typecheck) passed on both commits
+- No references to `expanded`, `renderPlaylistBody`, `handleTrackClick`, `SelectionController`, or expand/collapse chevron in playlist-view
+- Navigation routing case exists in index.ts
+- playlist-details component has @customElement decorator, back button, header, track rendering, context menus, drag support