feat(admin): 仪表盘重构、代理线路修复与后台体验优化

- 各角色仪表盘：KPI 可点击跳转、快捷入口、去重冗余区块，代理/站点降级 analytics
- 代理线路：创建玩家权限、侧栏搜索、深链 URL、档案保存与删除预检等修复
- 统一密码最短 6 位；代理模块表格/侧栏背景色一致（admin-table-inset）
- 报表、钱包、对账、开奖、结算、配置等模块结构与 i18n 同步更新

scripts/merge-en-translations.mjs

@@ -155,10 +155,10 @@ const translations = {
     "lineProvision.siteRequired": "Select an integration site",
     "lineProvision.noUnboundSite": "No sites without a level-1 agent",
     "lineProvision.openIntegrationSites": "Go to integration sites",
-    "lineProvision.passwordHint": "At least 8 characters",
+    "lineProvision.passwordHint": "At least 6 characters",
     "playersPanel.siteCode": "Line site",
-    "playersPanel.passwordHint": "At least 8 characters",
-    "playersPanel.passwordMinLength": "Initial password must be at least 8 characters",
+    "playersPanel.passwordHint": "At least 6 characters",
+    "playersPanel.passwordMinLength": "Initial password must be at least 6 characters",
     "playersPanel.creditLimitInvalid": "Credit limit must be an integer ≥ 0",
     "playersPanel.creditLimitExceeded": "Credit limit cannot exceed this agent’s available grant",
     "playersPanel.rebateRateInvalid": "Rebate rate must be between 0 and 100%",