feat: 新增工单反馈系统

db.js

@@ -255,6 +255,63 @@ function migrateSchema() {
       try { db.exec("ALTER TABLE admin_links ADD COLUMN trusted INTEGER DEFAULT 1"); } catch {}
       try { db.exec("ALTER TABLE admin_links ADD COLUMN slug TEXT DEFAULT ''"); } catch {}
     } },
+    // v16: 站内工单——用户反馈、公开回复、内部备注及业务事件
+    { version: 16, up: () => {
+      db.exec(`CREATE TABLE IF NOT EXISTS tickets (
+        id INTEGER PRIMARY KEY AUTOINCREMENT,
+        ticket_no TEXT NOT NULL UNIQUE,
+        requester_id INTEGER,
+        subject TEXT NOT NULL,
+        description TEXT NOT NULL,
+        category TEXT NOT NULL DEFAULT 'other',
+        priority TEXT NOT NULL DEFAULT 'normal',
+        status TEXT NOT NULL DEFAULT 'open',
+        source TEXT NOT NULL DEFAULT 'site',
+        source_url TEXT DEFAULT '',
+        source_type TEXT DEFAULT '',
+        source_id INTEGER DEFAULT 0,
+        browser_info TEXT DEFAULT '',
+        assignee_id INTEGER,
+        created_at DATETIME DEFAULT (datetime('now')),
+        updated_at DATETIME DEFAULT (datetime('now')),
+        last_reply_at DATETIME DEFAULT (datetime('now')),
+        first_response_at DATETIME,
+        resolved_at DATETIME,
+        closed_at DATETIME,
+        FOREIGN KEY (requester_id) REFERENCES users(id) ON DELETE SET NULL,
+        FOREIGN KEY (assignee_id) REFERENCES users(id) ON DELETE SET NULL
+      )`);
+      db.exec(`CREATE TABLE IF NOT EXISTS ticket_messages (
+        id INTEGER PRIMARY KEY AUTOINCREMENT,
+        ticket_id INTEGER NOT NULL,
+        author_id INTEGER,
+        content TEXT NOT NULL,
+        is_internal INTEGER NOT NULL DEFAULT 0,
+        created_at DATETIME DEFAULT (datetime('now')),
+        updated_at DATETIME DEFAULT (datetime('now')),
+        FOREIGN KEY (ticket_id) REFERENCES tickets(id) ON DELETE CASCADE,
+        FOREIGN KEY (author_id) REFERENCES users(id) ON DELETE SET NULL
+      )`);
+      db.exec(`CREATE TABLE IF NOT EXISTS ticket_events (
+        id INTEGER PRIMARY KEY AUTOINCREMENT,
+        ticket_id INTEGER NOT NULL,
+        actor_id INTEGER,
+        event_type TEXT NOT NULL,
+        field_name TEXT DEFAULT '',
+        old_value TEXT DEFAULT '',
+        new_value TEXT DEFAULT '',
+        detail TEXT DEFAULT '',
+        created_at DATETIME DEFAULT (datetime('now')),
+        FOREIGN KEY (ticket_id) REFERENCES tickets(id) ON DELETE CASCADE,
+        FOREIGN KEY (actor_id) REFERENCES users(id) ON DELETE SET NULL
+      )`);
+      db.exec('CREATE INDEX IF NOT EXISTS idx_tickets_requester ON tickets(requester_id, updated_at DESC)');
+      db.exec('CREATE INDEX IF NOT EXISTS idx_tickets_status_updated ON tickets(status, updated_at DESC)');
+      db.exec('CREATE INDEX IF NOT EXISTS idx_tickets_assignee ON tickets(assignee_id, status, updated_at DESC)');
+      db.exec('CREATE INDEX IF NOT EXISTS idx_tickets_category ON tickets(category, updated_at DESC)');
+      db.exec('CREATE INDEX IF NOT EXISTS idx_ticket_messages_ticket ON ticket_messages(ticket_id, created_at ASC)');
+      db.exec('CREATE INDEX IF NOT EXISTS idx_ticket_events_ticket ON ticket_events(ticket_id, created_at ASC)');
+    } },
   ];
   for (const m of migrations) {
     if (current < m.version) { m.up(); db.exec('PRAGMA user_version = ' + m.version); }