feat: 全局设置系统 — settings 表、CRUD 路由、主题偏好持久化

tests/web/routes/workbench.test.tsx

@@ -18,6 +18,12 @@ function createMockHandler(overrides?: { status?: "active" | "archived" }) {
   const project = { ...MOCK_PROJECT, ...overrides };
   const handler = (input: RequestInfo | URL) => {
     const url = input instanceof Request ? input.url : typeof input === "string" ? input : input.toString();
+    if (url.includes("/api/settings")) {
+      return new Response(JSON.stringify({ theme: "system" }), {
+        headers: { "Content-Type": "application/json" },
+        status: 200,
+      });
+    }
     if (url.includes("/api/meta")) {
       return new Response(
         JSON.stringify({ ok: true, service: "test-app", timestamp: new Date().toISOString(), version: "0.1.0" }),
@@ -38,7 +44,8 @@ function createMockHandler(overrides?: { status?: "active" | "archived" }) {
     }
     return new Response(JSON.stringify({ error: "Not Found" }), { status: 404 });
   };
-  const mocked = handler as unknown as typeof fetch;
+  const mocked = ((input: RequestInfo | URL, _init?: RequestInit) =>
+    Promise.resolve(handler(input))) as unknown as typeof fetch;
   globalThis.fetch = mocked;
   window.fetch = mocked;
 }