prod: UI Optimisée mise en production

- Documentation archivée et réorganisée
- Backend: Ajout tests, migrations, library service, rate limiting
- Frontend: Suppression Flutter, focus sur interface web HTML/JS
- Tailwind CSS ajouté pour le style
- Améliorations UX et corrections bugs

Generated with [Claude Code](https://claude.com/claude-code)
via [Happy](https://happy.engineering)

Co-Authored-By: Claude <noreply@anthropic.com>
Co-Authored-By: Happy <yesreply@happy.engineering>

backend/fix_bug.py

@@ -0,0 +1,63 @@
+#!/usr/bin/env python3
+"""Fix the completed column type bug in listening_history table."""
+
+import asyncio
+import sys
+from pathlib import Path
+
+# Add backend to path
+sys.path.insert(0, str(Path(__file__).parent))
+
+from app.core.database import get_db
+from sqlalchemy import text
+
+async def fix_completed_column():
+    """Fix the completed column type from INTEGER to BOOLEAN."""
+    print("🔧 Fixing completed column type...")
+
+    async for db in get_db():
+        try:
+            # Check current type
+            result = await db.execute(text("""
+                SELECT column_name, data_type
+                FROM information_schema.columns
+                WHERE table_name = 'listening_history'
+                AND column_name = 'completed'
+            """))
+
+            for row in result:
+                print(f"   Current type: {row[1]}")
+
+            # Fix the column type
+            await db.execute(text("""
+                ALTER TABLE listening_history
+                ALTER COLUMN completed
+                TYPE BOOLEAN
+                USING CASE WHEN completed = 1 THEN TRUE ELSE FALSE END
+            """))
+
+            await db.commit()
+            print("   ✅ Column type fixed: INTEGER → BOOLEAN")
+
+            # Verify the fix
+            result = await db.execute(text("""
+                SELECT column_name, data_type
+                FROM information_schema.columns
+                WHERE table_name = 'listening_history'
+                AND column_name = 'completed'
+            """))
+
+            for row in result:
+                print(f"   ✅ New type: {row[1]}")
+
+        except Exception as e:
+            print(f"   ❌ Error: {e}")
+            await db.rollback()
+            raise
+        finally:
+            await db.close()
+
+    print("🎉 Bug fixed successfully!")
+
+if __name__ == "__main__":
+    asyncio.run(fix_completed_column())