Add user authentication and role management

app/api/auth/login/route.ts

@@ -0,0 +1,47 @@
+import {
+  createSession,
+  createSessionCookie,
+  ensureInitialSuperAdmin,
+  normalizeUsername,
+  verifyPassword,
+} from "../../../../lib/user-auth";
+import { getRawDb } from "../../../../lib/mvp-db";
+
+export const runtime = "edge";
+
+export async function POST(request: Request) {
+  try {
+    await ensureInitialSuperAdmin();
+    const body = (await request.json()) as { username?: string; password?: string };
+    const username = normalizeUsername(body.username);
+    const password = String(body.password ?? "");
+    const user = await getRawDb()
+      .prepare(
+        `SELECT id, username, role, password_hash, password_salt, password_iterations
+         FROM users WHERE username = ? LIMIT 1`,
+      )
+      .bind(username)
+      .first<{
+        id: string;
+        username: string;
+        role: string;
+        password_hash: string;
+        password_salt: string;
+        password_iterations: number;
+      }>();
+    if (!user || !(await verifyPassword(password, user))) {
+      return Response.json({ error: "账号或密码错误" }, { status: 401 });
+    }
+    const token = await createSession(user.id);
+    const secure = new URL(request.url).protocol === "https:";
+    return Response.json(
+      { user: { id: user.id, username: user.username, role: user.role } },
+      { headers: { "Set-Cookie": createSessionCookie(token, secure) } },
+    );
+  } catch (error) {
+    return Response.json(
+      { error: error instanceof Error ? error.message : "登录失败" },
+      { status: 500 },
+    );
+  }
+}