Add discovery modes, personalization controls, taste profile page, updated pricing

- Discovery modes: Sonic Twin, Era Bridge, Deep Cuts, Rising Artists
- Discovery dial (Safe to Adventurous slider)
- Block genres/moods exclusion
- Thumbs down/dislike on recommendations
- My Taste page with Genre DNA breakdown, audio feature meters, listening personality
- Updated pricing: Free (5/week), Premium ($6.99/mo), Family ($12.99/mo coming soon)
- Weekly rate limiting instead of daily
- Alembic migration for new fields

backend/app/schemas/recommendation.py

@@ -7,6 +7,9 @@ class RecommendationRequest(BaseModel):
     playlist_id: int | None = None
     query: str | None = None  # Manual search/request
     bandcamp_mode: bool = False  # Prioritize Bandcamp/indie artists
+    mode: str = "discover"  # discover, sonic_twin, era_bridge, deep_cuts, rising
+    adventurousness: int = 3  # 1-5
+    exclude: str | None = None  # comma-separated genres to exclude
 
 
 class RecommendationItem(BaseModel):
@@ -21,6 +24,7 @@ class RecommendationItem(BaseModel):
     reason: str
     score: float | None = None
     saved: bool = False
+    disliked: bool = False
     created_at: datetime
 
     model_config = {"from_attributes": True}
@@ -28,7 +32,7 @@ class RecommendationItem(BaseModel):
 
 class RecommendationResponse(BaseModel):
     recommendations: list[RecommendationItem]
-    remaining_today: int | None = None  # None = unlimited (pro)
+    remaining_this_week: int | None = None  # None = unlimited (pro)
 
 
 class TasteProfile(BaseModel):