Initialize backendized SurClaw report system

- Add React/Vite frontend for login, dashboard, reports, templates, users, settings, AI, speech, and media workflows.

- Add NestJS/Prisma/PostgreSQL backend with auth, dashboard stats, reports, templates, users, departments, settings, files, AI, speech, audit logs, and HTML sanitization.

- Add Prisma schema, migrations, seed data, persistent app sessions, Docker/Nginx deployment files, and upload volume configuration.

- Add Vitest, Playwright, backend integration tests, and project documentation for requirements, design, permissions, API contracts, testing, deployment, security, and progress.

- Configure production local fallback switch and remove unused Gemini direct dependency/env wiring.

server/src/auth/auth.schemas.ts

@@ -0,0 +1,8 @@
+import { z } from 'zod';
+
+export const loginSchema = z.object({
+  username: z.string().trim().min(1, '用户名不能为空'),
+  password: z.string().min(1, '密码不能为空'),
+});
+
+export type LoginInput = z.infer<typeof loginSchema>;