feat(company): add subscription expiry management and expired company guard

Add validity period fields to company CRUD, display expiry info in
table and profile, and block access for expired companies via a
full-screen guard component.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

config/proxy.ts

@@ -15,7 +15,8 @@ export default {
     '/api': {
       // The address to proxy
       // target: 'http://2333z061l7.51mypc.cn',
-      target: 'http://172.20.177.121:8080',
+      // target: 'http://172.20.177.121:8080',
+      target: 'http://172.20.177.121:8082',
       changeOrigin: true,
       pathRewrite: {
         '^/api': '',