v3: added a chatbox

api/db/migrations/0008_chat_messages.ts

@@ -0,0 +1,18 @@
+import type { DatabaseSync } from "node:sqlite";
+
+// Idempotent: safe to run against a fresh db (already created from schema.sql
+// with this table) or an existing one that predates it.
+export function up(db: DatabaseSync): void {
+  db.exec(`CREATE TABLE IF NOT EXISTS chat_messages (
+    id         TEXT NOT NULL PRIMARY KEY,
+    user_id    TEXT NOT NULL,
+    body       TEXT NOT NULL,
+    created_at TEXT NOT NULL,
+    updated_at TEXT,
+    FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE CASCADE
+  );`);
+
+  db.exec(
+    `CREATE INDEX IF NOT EXISTS idx_chat_messages_created ON chat_messages(created_at);`,
+  );
+}