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

frontend/src/components/RecommendationCard.tsx

@@ -1,13 +1,15 @@
-import { Heart, ExternalLink, Music } from 'lucide-react'
+import { Heart, ExternalLink, Music, ThumbsDown } from 'lucide-react'
 import type { RecommendationItem } from '../lib/api'
 
 interface Props {
   recommendation: RecommendationItem
   onToggleSave: (id: string) => void
+  onDislike?: (id: string) => void
   saving?: boolean
+  disliking?: boolean
 }
 
-export default function RecommendationCard({ recommendation, onToggleSave, saving }: Props) {
+export default function RecommendationCard({ recommendation, onToggleSave, onDislike, saving, disliking }: Props) {
   return (
     <div className="bg-white rounded-2xl border border-purple-100 shadow-sm hover:shadow-md transition-shadow overflow-hidden">
       <div className="flex gap-4 p-5">
@@ -60,6 +62,24 @@ export default function RecommendationCard({ recommendation, onToggleSave, savin
             />
           </button>
 
+          {onDislike && (
+            <button
+              onClick={() => onDislike(recommendation.id)}
+              disabled={disliking}
+              className={`p-2 rounded-full transition-colors cursor-pointer border-none ${
+                recommendation.disliked
+                  ? 'bg-charcoal-muted/20 text-charcoal'
+                  : 'bg-gray-50 text-gray-400 hover:bg-gray-100 hover:text-charcoal-muted'
+              } ${disliking ? 'opacity-50 cursor-not-allowed' : ''}`}
+              title={recommendation.disliked ? 'Undo dislike' : 'Never recommend this type again'}
+            >
+              <ThumbsDown
+                className="w-4 h-4"
+                fill={recommendation.disliked ? 'currentColor' : 'none'}
+              />
+            </button>
+          )}
+
           {recommendation.bandcamp_url && (
             <a
               href={recommendation.bandcamp_url}