feat: add IP-based login brute-force protection (#531)

* feat: add IP-based login brute-force protection

- Per-IP rate limiting: 3 failed login attempts locks the IP for 1 hour
- Separate counters for password login and token auth
- Global safety net: 20 req/min, hard lock after 50 total failures
- Persistent lock state to ~/.hermes-web-ui/.login-lock.json (survives restarts)
- Manual unlock: edit or delete the lock file
- Frontend handles 429/503 responses with localized error messages
- i18n support for 8 languages

* feat: add locked IP management endpoint and UI

- GET /api/auth/locked-ips: list all currently locked IPs (protected)
- DELETE /api/auth/locked-ips/:ip: unlock a specific IP (protected)
- DELETE /api/auth/locked-ips: unlock all IPs (protected)
- AccountSettings: shows locked IPs with remaining time, unlock buttons
- i18n support for 8 languages
- Clean up stale .js artifacts, add .gitignore rule

* fix: cross-type IP lock and IPv6-compatible unlock route

- Password and token login now share IP lock state: if an IP is locked
  by either method, ALL auth methods are blocked for that IP
- Changed unlock endpoint from path param to query param (?ip=xxx) to
  support IPv6 addresses containing colons
- Merged unlockIp and unlockAll into a single handler

* chore: increase global login rate limit from 20 to 100 requests per minute

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

---------

Co-authored-by: ekko <fqsy1416@gmail.com>
Co-authored-by: Claude Opus 4.7 <noreply@anthropic.com>

packages/client/src/i18n/locales/ko.ts

@@ -14,6 +14,7 @@ export default {
     passwordPlaceholder: '비밀번호',
     credentialsRequired: '사용자 이름과 비밀번호를 입력해 주세요',
     invalidCredentials: '사용자 이름 또는 비밀번호가 올바르지 않습니다',
+    tooManyAttempts: '로그인 시도 횟수가 너무 많습니다. 잠시 후 다시 시도해 주세요',
     passwordMismatch: '비밀번호가 일치하지 않습니다',
     passwordTooShort: '비밀번호는 6자 이상이어야 합니다',
     setupSuccess: '비밀번호 로그인이 설정되었습니다',
@@ -519,6 +520,16 @@ export default {
       cors: 'CORS 출처',
       corsHint: '허용된 교차 출처',
     },
+    lockedIps: {
+      title: '잠긴 IP 관리',
+      count: '{count}개 잠김',
+      empty: '잠긴 IP 없음',
+      unlock: '잠금 해제',
+      unlockAll: '전체 해제',
+      unlockAllConfirm: '모든 잠긴 IP를 해제하시겠습니까?',
+      unlocked: 'IP 잠금 해제됨',
+      allUnlocked: '{count}개 IP 잠금 해제됨',
+    },
   },
 
   // 플랫폼 채널 설정