Implement Phase 2 Frontend with Ant Design and verify Data Ingestion

- Created `frontend/` React+Vite app using Ant Design (Dark Theme).
- Implemented `App.jsx` to display listening history and calculated "Vibes".
- Updated `backend/app/ingest.py` to fix ReccoBeats ID parsing.
- Updated `backend/app/schemas.py` to expose audio features to the API.
- Updated `README.md` with detailed Docker hosting instructions.
- Added `TODO.md` for Phase 3 roadmap.
- Cleaned up test scripts.

backend/app/schemas.py

@@ -12,6 +12,19 @@ class TrackBase(BaseModel):
     lyrics_summary: Optional[str] = None
     genre_tags: Optional[str] = None
 
+    # Audio Features
+    danceability: Optional[float] = None
+    energy: Optional[float] = None
+    valence: Optional[float] = None
+    tempo: Optional[float] = None
+    key: Optional[int] = None
+    mode: Optional[int] = None
+    acousticness: Optional[float] = None
+    instrumentalness: Optional[float] = None
+    liveness: Optional[float] = None
+    speechiness: Optional[float] = None
+    loudness: Optional[float] = None
+
 class Track(TrackBase):
     created_at: datetime
     updated_at: datetime