feat: Phase 0 — monorepo 骨架 + 全表迁移 + FastAPI/Next 骨架 + CI

- uv(workspace) + pnpm monorepo；docker-compose(pg+api+web)
- SQLAlchemy 16 MVP 表 + Alembic 初版迁移(无漂移，users stub)
- FastAPI 骨架：统一错误信封(带 request_id) + structlog + /jobs/:id + OpenAPI
- Next.js 骨架：纸感主题 token + OpenAPI→TS 客户端代码生成(gen:api)
- CI(ruff/mypy/pytest + pg service + alembic 漂移校验)
- 四份设计规格(PRODUCT/UX/ARCHITECTURE/DEV_PLAN) + CLAUDE.md

apps/web/lib/api/server.ts

@@ -0,0 +1,37 @@
+import { serverApiBase } from "./config";
+import type {
+  ProjectListResponse,
+  ProjectResponse,
+  ProvidersResponse,
+  ReviewHistoryResponse,
+} from "./types";
+
+// 服务端只读取数据（Server Components）。失败时抛出，由页面边界处理。
+async function getJson<T>(path: string): Promise<T> {
+  const res = await fetch(`${serverApiBase()}${path}`, { cache: "no-store" });
+  if (!res.ok) {
+    throw new Error(`请求失败 ${res.status}: ${path}`);
+  }
+  return (await res.json()) as T;
+}
+
+export async function fetchProjects(): Promise<ProjectListResponse> {
+  return getJson<ProjectListResponse>("/projects");
+}
+
+export async function fetchProject(projectId: string): Promise<ProjectResponse> {
+  return getJson<ProjectResponse>(`/projects/${projectId}`);
+}
+
+export async function fetchProviders(): Promise<ProvidersResponse> {
+  return getJson<ProvidersResponse>("/settings/providers");
+}
+
+export async function fetchReviews(
+  projectId: string,
+  chapterNo: number,
+): Promise<ReviewHistoryResponse> {
+  return getJson<ReviewHistoryResponse>(
+    `/projects/${projectId}/chapters/${chapterNo}/reviews`,
+  );
+}