fix: loan error surfacing, non-admin export, guarded atomic migration, expanded player controls

server/src/db.ts

@@ -95,18 +95,24 @@ function setSchemaVersion(db: DB, version: number): void {
 export function migrateUpgrades(db: DB): void {
   const version = getSchemaVersion(db)
   if (version < 2) {
-    db.exec(`
-      ALTER TABLE digital_albums ADD COLUMN last_played_at TEXT;
-      CREATE TABLE IF NOT EXISTS loans (
+    const hasColumn = (db.prepare('PRAGMA table_info(digital_albums)').all() as { name: string }[]).some(
+      (c) => c.name === 'last_played_at'
+    )
+    const apply = db.transaction(() => {
+      if (!hasColumn) {
+        db.exec('ALTER TABLE digital_albums ADD COLUMN last_played_at TEXT')
+      }
+      db.exec(`CREATE TABLE IF NOT EXISTS loans (
         id INTEGER PRIMARY KEY AUTOINCREMENT,
         user_id INTEGER NOT NULL REFERENCES users(id) ON DELETE CASCADE,
         item_id INTEGER NOT NULL REFERENCES collection_items(id) ON DELETE CASCADE,
         borrower TEXT NOT NULL,
         lent_at TEXT NOT NULL DEFAULT (datetime('now')),
         returned_at TEXT
-      );
-    `)
-    setSchemaVersion(db, 2)
+      );`)
+      setSchemaVersion(db, 2)
+    })
+    apply()
   }
 }