Add playlist export and SEO meta tags

Add text/CSV export endpoints for playlists and saved recommendations.
Add export buttons to PlaylistDetail and Recommendations pages.
Add Open Graph and Twitter meta tags to index.html for better SEO.

backend/app/api/endpoints/playlists.py

@@ -1,4 +1,5 @@
-from fastapi import APIRouter, Depends, HTTPException
+from fastapi import APIRouter, Depends, HTTPException, Query
+from fastapi.responses import PlainTextResponse
 from sqlalchemy import select
 from sqlalchemy.ext.asyncio import AsyncSession
 from sqlalchemy.orm import selectinload
@@ -49,6 +50,39 @@ async def get_playlist(
     return playlist
 
 
+@router.get("/{playlist_id}/export")
+async def export_playlist(
+    playlist_id: int,
+    format: str = Query("text", pattern="^(text|csv)$"),
+    user: User = Depends(get_current_user),
+    db: AsyncSession = Depends(get_db),
+):
+    result = await db.execute(
+        select(Playlist).options(selectinload(Playlist.tracks))
+        .where(Playlist.id == playlist_id, Playlist.user_id == user.id)
+    )
+    playlist = result.scalar_one_or_none()
+    if not playlist:
+        raise HTTPException(status_code=404, detail="Playlist not found")
+
+    if format == "csv":
+        lines = ["Title,Artist,Album"]
+        for t in playlist.tracks:
+            # Escape commas in CSV
+            title = f'"{t.title}"' if ',' in t.title else t.title
+            artist = f'"{t.artist}"' if ',' in t.artist else t.artist
+            album = f'"{t.album}"' if t.album and ',' in t.album else (t.album or '')
+            lines.append(f"{title},{artist},{album}")
+        return PlainTextResponse("\n".join(lines), media_type="text/csv",
+            headers={"Content-Disposition": f'attachment; filename="{playlist.name}.csv"'})
+    else:
+        lines = [f"{playlist.name}", "=" * len(playlist.name), ""]
+        for i, t in enumerate(playlist.tracks, 1):
+            lines.append(f"{i}. {t.artist} - {t.title}")
+        return PlainTextResponse("\n".join(lines), media_type="text/plain",
+            headers={"Content-Disposition": f'attachment; filename="{playlist.name}.txt"'})
+
+
 @router.delete("/{playlist_id}")
 async def delete_playlist(
     playlist_id: int,

backend/app/api/endpoints/recommendations.py

@@ -1,9 +1,13 @@
 import hashlib
 import json
+import logging
 from urllib.parse import quote_plus
 
 import anthropic
+
+api_logger = logging.getLogger("app")
 from fastapi import APIRouter, Depends, HTTPException
+from fastapi.responses import PlainTextResponse
 from pydantic import BaseModel
 from sqlalchemy import select
 from sqlalchemy.ext.asyncio import AsyncSession
@@ -77,6 +81,24 @@ async def history(
     return result.scalars().all()
 
 
+@router.get("/saved/export")
+async def export_saved(user: User = Depends(get_current_user), db: AsyncSession = Depends(get_db)):
+    result = await db.execute(
+        select(Recommendation).where(Recommendation.user_id == user.id, Recommendation.saved == True)
+        .order_by(Recommendation.created_at.desc())
+    )
+    recs = result.scalars().all()
+    lines = ["My Saved Discoveries - Vynl", "=" * 30, ""]
+    for i, r in enumerate(recs, 1):
+        lines.append(f"{i}. {r.artist} - {r.title}")
+        if r.youtube_url:
+            lines.append(f"   {r.youtube_url}")
+        lines.append(f"   {r.reason}")
+        lines.append("")
+    return PlainTextResponse("\n".join(lines), media_type="text/plain",
+        headers={"Content-Disposition": 'attachment; filename="vynl-discoveries.txt"'})
+
+
 @router.get("/saved", response_model=list[RecommendationItem])
 async def saved(
     user: User = Depends(get_current_user),
@@ -132,6 +154,12 @@ Return ONLY the JSON object."""
         messages=[{"role": "user", "content": prompt}],
     )
 
+    # Track API cost (Haiku: $0.80/M input, $4/M output)
+    input_tokens = message.usage.input_tokens
+    output_tokens = message.usage.output_tokens
+    cost = (input_tokens * 0.80 / 1_000_000) + (output_tokens * 4 / 1_000_000)
+    api_logger.info(f"API_COST|model=claude-haiku|input={input_tokens}|output={output_tokens}|cost=${cost:.4f}|user={user.id}|endpoint=analyze")
+
     response_text = message.content[0].text.strip()
     if response_text.startswith("```"):
         response_text = response_text.split("\n", 1)[1]

frontend/index.html

@@ -7,6 +7,21 @@
     <link rel="preconnect" href="https://fonts.googleapis.com" />
     <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin />
     <link href="https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap" rel="stylesheet" />
+    <meta name="description" content="Discover music you'll love with AI. Import your playlists, get personalized recommendations, and explore new artists." />
+    <meta name="keywords" content="music discovery, AI music, playlist analyzer, find new music, music recommendations" />
+
+    <!-- Open Graph -->
+    <meta property="og:type" content="website" />
+    <meta property="og:title" content="Vynl - AI Music Discovery" />
+    <meta property="og:description" content="Dig deeper. Discover more. AI-powered music recommendations that actually understand your taste." />
+    <meta property="og:url" content="https://deepcutsai.com" />
+    <meta property="og:site_name" content="Vynl" />
+
+    <!-- Twitter -->
+    <meta name="twitter:card" content="summary_large_image" />
+    <meta name="twitter:title" content="Vynl - AI Music Discovery" />
+    <meta name="twitter:description" content="Dig deeper. Discover more. AI-powered music recommendations that actually understand your taste." />
+
     <title>Vynl - AI Music Discovery</title>
   </head>
   <body>

frontend/src/lib/api.ts

@@ -144,6 +144,16 @@ export const login = (email: string, password: string) =>
 export const getMe = () =>
   api.get<UserResponse>('/auth/me').then((r) => r.data)
 
+// Profile & Settings
+export const updateProfile = (data: { name?: string; email?: string }) =>
+  api.put<UserResponse>('/auth/me', data).then((r) => r.data)
+
+export const changePassword = (currentPassword: string, newPassword: string) =>
+  api.post('/auth/change-password', { current_password: currentPassword, new_password: newPassword })
+
+export const deleteAccount = () =>
+  api.delete('/auth/me')
+
 // Spotify OAuth
 export const getSpotifyAuthUrl = () =>
   api.get<{ url: string; state: string }>('/auth/spotify/authorize').then((r) => r.data)
@@ -370,6 +380,26 @@ export interface PlaylistFixResponse {
 export const fixPlaylist = (playlistId: string) =>
   api.post<PlaylistFixResponse>(`/playlists/${playlistId}/fix`).then((r) => r.data)
 
+export const exportPlaylist = (id: string, format: string = 'text') =>
+  api.get(`/playlists/${id}/export`, { params: { format }, responseType: 'blob' }).then((r) => {
+    const url = URL.createObjectURL(r.data)
+    const a = document.createElement('a')
+    a.href = url
+    a.download = format === 'csv' ? 'playlist.csv' : 'playlist.txt'
+    a.click()
+    URL.revokeObjectURL(url)
+  })
+
+export const exportSaved = () =>
+  api.get('/recommendations/saved/export', { responseType: 'blob' }).then((r) => {
+    const url = URL.createObjectURL(r.data)
+    const a = document.createElement('a')
+    a.href = url
+    a.download = 'vynl-discoveries.txt'
+    a.click()
+    URL.revokeObjectURL(url)
+  })
+
 // Taste Profile
 export const getTasteProfile = () =>
   api.get<TasteProfileResponse>('/profile/taste').then((r) => r.data)

frontend/src/pages/PlaylistDetail.tsx

@@ -1,7 +1,7 @@
 import { useState, useEffect } from 'react'
 import { useParams, useNavigate, Link } from 'react-router-dom'
-import { ArrowLeft, Loader2, Music, Clock, Sparkles, Trash2, Wand2, AlertTriangle, CheckCircle2, X } from 'lucide-react'
-import { getPlaylist, deletePlaylist, fixPlaylist, type PlaylistDetailResponse, type PlaylistFixResponse } from '../lib/api'
+import { ArrowLeft, Loader2, Music, Clock, Sparkles, Trash2, Wand2, AlertTriangle, CheckCircle2, X, Download } from 'lucide-react'
+import { getPlaylist, deletePlaylist, fixPlaylist, exportPlaylist, type PlaylistDetailResponse, type PlaylistFixResponse } from '../lib/api'
 import TasteProfile from '../components/TasteProfile'
 
 function formatDuration(ms: number): string {
@@ -138,6 +138,20 @@ export default function PlaylistDetail() {
                   {showProfile ? 'Hide' : 'Show'} Taste Profile
                 </button>
               )}
+              <button
+                onClick={() => id && exportPlaylist(id, 'text')}
+                className="flex items-center gap-2 px-4 py-2.5 bg-purple-50 text-purple text-sm font-medium rounded-xl hover:bg-purple-100 transition-colors cursor-pointer border-none"
+              >
+                <Download className="w-4 h-4" />
+                Export TXT
+              </button>
+              <button
+                onClick={() => id && exportPlaylist(id, 'csv')}
+                className="flex items-center gap-2 px-4 py-2.5 bg-purple-50 text-purple text-sm font-medium rounded-xl hover:bg-purple-100 transition-colors cursor-pointer border-none"
+              >
+                <Download className="w-4 h-4" />
+                Export CSV
+              </button>
               <button
                 onClick={handleDelete}
                 disabled={deleting}

frontend/src/pages/Recommendations.tsx

@@ -1,7 +1,7 @@
 import { useState, useEffect } from 'react'
-import { Loader2, Clock, Heart, Sparkles } from 'lucide-react'
+import { Loader2, Clock, Heart, Sparkles, Download } from 'lucide-react'
 import { useAuth } from '../lib/auth'
-import { getRecommendationHistory, getSavedRecommendations, toggleSaveRecommendation, type RecommendationItem } from '../lib/api'
+import { getRecommendationHistory, getSavedRecommendations, toggleSaveRecommendation, exportSaved, type RecommendationItem } from '../lib/api'
 import RecommendationCard from '../components/RecommendationCard'
 
 type Tab = 'saved' | 'history'
@@ -92,7 +92,18 @@ export default function Recommendations() {
         </div>
       )}
 
-      {/* Tabs */}
+      {/* Export + Tabs */}
+      <div className="flex items-center gap-4">
+        {tab === 'saved' && saved.length > 0 && (
+          <button
+            onClick={() => exportSaved()}
+            className="flex items-center gap-2 px-4 py-2.5 bg-purple-50 text-purple text-sm font-medium rounded-xl hover:bg-purple-100 transition-colors cursor-pointer border-none"
+          >
+            <Download className="w-4 h-4" />
+            Export Saved
+          </button>
+        )}
+      </div>
       <div className="flex gap-1 bg-purple-50 p-1 rounded-xl w-fit">
         <button
           onClick={() => setTab('saved')}