feat(admin): make user rate limits configurable via admin UI

Add rate_limit_settings table and corresponding admin permissions
Replace static user rate limits with dynamic in-memory counters
Add interface in admin panel to configure rate limit policies

system-wordings.ts

@@ -838,6 +838,17 @@ export const systemWordingMessages = {
         aiModerationApiKeyMissing: 'API Key missing',
         aiModerationClearApiKey: 'Clear saved API Key',
         aiModerationSettings: 'AI moderation settings',
+        rateLimits: 'Rate limits',
+        rateLimitMaxRequests: 'Max requests',
+        rateLimitWindowMinutes: 'Window minutes',
+        rateLimitCooldownSeconds: 'Cooldown seconds',
+        rateLimitAccountWrite: 'Account writes',
+        rateLimitAdminWrite: 'Management writes',
+        rateLimitWikiWrite: 'Wiki content writes',
+        rateLimitCommunityWrite: 'Community writes',
+        rateLimitCommunityReaction: 'Community reactions',
+        rateLimitUpload: 'Uploads',
+        rateLimitFetch: 'Pokemon fetch',
         wordingLocale: 'Locale',
         wordingModule: 'Module',
         wordingSurface: 'Surface',
@@ -1913,6 +1924,17 @@ export const systemWordingMessages = {
         aiModerationApiKeyMissing: 'API Key 未配置',
         aiModerationClearApiKey: '清除已保存 API Key',
         aiModerationSettings: 'AI 审核设置',
+        rateLimits: '限流',
+        rateLimitMaxRequests: '最大请求数',
+        rateLimitWindowMinutes: '窗口分钟数',
+        rateLimitCooldownSeconds: '冷却秒数',
+        rateLimitAccountWrite: '账号写入',
+        rateLimitAdminWrite: '管理写入',
+        rateLimitWikiWrite: 'Wiki 内容写入',
+        rateLimitCommunityWrite: '社区写入',
+        rateLimitCommunityReaction: '社区 Reaction',
+        rateLimitUpload: '上传',
+        rateLimitFetch: 'Pokemon Fetch',
         wordingLocale: '语言',
         wordingModule: '模块',
         wordingSurface: '端',