feat(api): implement chestny-znak web app with True API integration

- Fastify backend with auth (CryptoPro CAdES-BES), KM check, UPD parsing
- React frontend with auth page, code check, XML upload, results table
- Client-side signing via crypto-pro 2.3.0 (browser plugin)
- Token caching with auto-refresh, retry with exponential backoff
- Input validation schemas, file size limits, global 401 interceptor
- Docker compose with backend + frontend (nginx) services

backend/src/routes/auth.ts

@@ -1,6 +1,17 @@
 import type { FastifyInstance } from 'fastify'
-import { getAuthKey, signIn } from '../services/auth-service.js'
-import { getTokenTTL, hasToken } from '../services/token-cache.js'
+import { getAuthKey, signIn, clearToken, isAuthenticated } from '../services/auth-service.js'
+import { getTokenTTL } from '../services/token-cache.js'
+
+const signInSchema = {
+  body: {
+    type: 'object',
+    required: ['uuid', 'data'],
+    properties: {
+      uuid: { type: 'string' },
+      data: { type: 'string' },
+    },
+  },
+}
 
 export async function authRoutes(app: FastifyInstance): Promise<void> {
   app.get('/auth/key', async () => {
@@ -8,18 +19,23 @@ export async function authRoutes(app: FastifyInstance): Promise<void> {
     return { uuid: authKey.uuid, data: authKey.data }
   })
 
-  app.post<{ Body: { uuid: string; data: string } }>('/auth/signin', async (request) => {
+  app.post<{ Body: { uuid: string; data: string } }>('/auth/simpleSignIn', { schema: signInSchema }, async (request) => {
     const { uuid, data } = request.body
     const result = await signIn({ uuid, data })
     return result
   })
 
   app.get('/auth/status', async () => {
-    const authenticated = hasToken()
+    const authenticated = isAuthenticated()
     const ttl = getTokenTTL()
     return {
       authenticated,
       tokenExpiresAt: ttl ? new Date(ttl).toISOString() : null,
     }
   })
+
+  app.post('/auth/logout', async () => {
+    clearToken()
+    return { success: true }
+  })
 }