Rebuild frontend with Tailwind CSS + fix Python 3.14 compatibility

- Upgrade SQLAlchemy 2.0.27→2.0.45, google-genai SDK for Python 3.14
- Replace google-generativeai with google-genai in narrative_service.py
- Fix HTTPException handling in main.py (was wrapping as 500)
- Rebuild all frontend components with Tailwind CSS v3:
  - Dashboard, NarrativeSection, StatsGrid, VibeRadar, HeatMap, TopRotation
  - Custom color palette (background-dark, card-dark, accent-neon, etc.)
  - Add glass-panel, holographic-badge CSS effects
- Docker improvements:
  - Combined backend container (API + worker in entrypoint.sh)
  - DATABASE_URL configurable via env var
  - CI workflow builds both backend and frontend images
- Update README with clearer docker-compose instructions

backend/app/main.py

@@ -16,8 +16,18 @@ load_dotenv()
 # Create tables
 Base.metadata.create_all(bind=engine)
 
+from fastapi.middleware.cors import CORSMiddleware
+
 app = FastAPI(title="Music Analyser Backend")
 
+app.add_middleware(
+    CORSMiddleware,
+    allow_origins=["http://localhost:5173"],
+    allow_credentials=True,
+    allow_methods=["*"],
+    allow_headers=["*"],
+)
+
 @app.get("/")
 def read_root():
     return {"status": "ok", "message": "Music Analyser API is running"}
@@ -59,9 +69,8 @@ def trigger_analysis(
         if stats_json["volume"]["total_plays"] == 0:
              raise HTTPException(status_code=404, detail="No plays found in the specified period.")
 
-        # 2. Generate Narrative
         narrative_service = NarrativeService(model_name=model_name)
-        narrative_json = narrative_service.generate_narrative(stats_json)
+        narrative_json = narrative_service.generate_full_narrative(stats_json)
 
         # 3. Save Snapshot
         snapshot = AnalysisSnapshot(
@@ -84,6 +93,8 @@ def trigger_analysis(
             "narrative": narrative_json
         }
 
+    except HTTPException:
+        raise  # Re-raise HTTPExceptions as-is (404, etc.)
     except Exception as e:
         print(f"Analysis Failed: {e}")
         raise HTTPException(status_code=500, detail=str(e))