FEATURE: Playlists aufteilen

[verityyt]

Als User möchte ich ein Feature haben, dass mir erlaubt eine oder mehrere Quell-Playlists und mehrere Ziel-Playlists anzugeben. Anschließend wir mir nach und nach - im selben Stil wie der Rest der App - jeder Song aus den Quell-Playlists angezeigt und ich als User kann entschieden zu welcher Ziel-Playlist dieser Song hinzugefügt wird. Die Quell-Playlists bleiben dabei unverändert.

[gomoritz]

@claude Implementiere dieses Feature.

[claude]

Claude finished @gomoritz's task in 6m 45s —— View job • claude/issue-46-20260306-1325 • Create PR ➔

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Implementing Playlist Split Feature

• Analyze codebase structure and existing patterns
• Add mode selection UI (Compose vs Split)
• Create Splitter orchestrator component
• Create SongAssigner component (song-by-song assignment to target playlists)
• Create SplitFinishScreen component (summary and execution)
• Build and verify
• Commit and push changes

Summary

Implemented the playlist split feature with the following components:

New files:

• src/components/ModeSelection.tsx - Home screen with Compose/Split mode cards
• src/components/splitter/Splitter.tsx - Orchestrator managing the 4-step flow
• src/components/splitter/TargetPlaylistPicker.tsx - Select 2+ target playlists (excludes source playlists)
• src/components/splitter/SongAssigner.tsx - Song-by-song UI with target playlist buttons, audio preview, and skip option
• src/components/splitter/SplitFinishScreen.tsx - Summary showing assignments per playlist with progress tracking and cross-service song matching

Modified:

• src/app/page.tsx - Added mode selection between Compose and Split

Flow:

1. User selects "Split" mode on the home screen
2. Picks source playlists (reuses existing PlaylistPicker)
3. Picks target playlists (min. 2 required, source playlists excluded)
4. Goes through each song with album art background + audio preview, tapping a target playlist button to assign it (or skip)
5. Review screen shows all assignments, then adds songs to the target playlists with cross-service matching support

Source playlists remain unchanged.