feat(platform): add platform access control with quota management

- Add userPlatform hook to derive available platforms from company config
- Add platform access section in company popup with MT4/MT5 switch and quota limits
- Add platform access column in company list showing quota usage
- Replace hardcoded platform options with dynamic userPlatform in account/alert/data-source pages
- Add getPlatformList API and extend CompanyListItem typings
- Add i18n translations for platform access related keys
- Update dev proxy target port to 8082

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

tsconfig.json

@@ -1,5 +1,6 @@
 {
   "compilerOptions": {
+    "ignoreDeprecations": "6.0",
     "baseUrl": "./",
     "target": "esnext",
     "moduleResolution": "node",