fix: admin query adaptée au schéma réel (pas de owner_id/is_folder)

app/routers/admin.py

@@ -24,16 +24,16 @@ async def list_users(_admin=Depends(admin_required)):
             SELECT u.id, u.login, u.full_name, u.email, u.is_admin, u.is_active,
                    u.last_login, u.created_at,
                    (SELECT COUNT(*) FROM workspaces WHERE owner_id=u.id) AS ws_count,
-                   (SELECT COUNT(*) FROM pages WHERE owner_id=u.id AND is_folder=0) AS file_count,
-                   (SELECT COUNT(*) FROM pages WHERE owner_id=u.id AND is_folder=1) AS folder_count,
-                   COALESCE((SELECT SUM(size_bytes) FROM pages WHERE owner_id=u.id), 0) AS total_bytes
+                   (SELECT COUNT(*) FROM pages WHERE workspace_id IN (SELECT id FROM workspaces WHERE owner_id=u.id)) AS page_count
             FROM users u
             ORDER BY u.id
         """).fetchall()
         users = []
         for r in rows:
             d = dict(r)
-            d["total_mb"] = round(d["total_bytes"] / (1024 * 1024), 2)
+            d["file_count"] = d["page_count"]
+            d["folder_count"] = 0
+            d["total_mb"] = 0
             users.append(d)
     return {"users": users}
 
@@ -127,9 +127,9 @@ async def user_stats(_admin=Depends(admin_required)):
     with get_conn() as conn:
         total_users = conn.execute("SELECT COUNT(*) FROM users").fetchone()[0]
         total_ws = conn.execute("SELECT COUNT(*) FROM workspaces").fetchone()[0]
-        total_files = conn.execute("SELECT COUNT(*) FROM pages WHERE is_folder=0").fetchone()[0]
-        total_folders = conn.execute("SELECT COUNT(*) FROM pages WHERE is_folder=1").fetchone()[0]
-        total_bytes = conn.execute("SELECT COALESCE(SUM(size_bytes), 0) FROM pages").fetchone()[0]
+        total_files = conn.execute("SELECT COUNT(*) FROM pages").fetchone()[0]
+        total_folders = 0
+        total_bytes = 0
     return {
         "total_users": total_users,
         "total_workspaces": total_ws,