Fix admin authorization and harden chat requests

scripts/set-role.js

@@ -0,0 +1,18 @@
+/** Operator-only role assignment; never exposed through an HTTP endpoint. */
+import {createConfig} from "../src/config.js";
+import {createDatabase} from "../src/db/index.js";
+
+const [username, role] = process.argv.slice(2);
+if (!username || !["user", "admin"].includes(role) || process.argv.length !== 4) {
+    console.error("Usage: npm run user:role -- <existing-username> <user|admin>");
+    process.exitCode = 1;
+} else {
+    const db = createDatabase(createConfig());
+    try {
+        const result = db.prepare("UPDATE users SET role = ? WHERE username = ?").run(role, username);
+        if (!result.changes) throw new Error("Account not found. Register the account first.");
+        console.log(`Role for ${username} set to ${role}.`);
+    } finally {
+        db.close();
+    }
+}