feat(docs, agents, risk): enhance documentation, API queries, and UI components

Updated the public documentation site with improved layout and accessibility, including new sections for client integration and admin guides. Enhanced API queries by adding 'active_only' and 'group_by' parameters for better data filtering in risk management. Refined UI components for agent management, ensuring consistent styling and improved user experience across the application. Added localization support for new documentation content in English and Nepali.

src/i18n/locales/en/settlementCenter.json

@@ -1,6 +1,7 @@
 {
   "title": "Settlement center",
   "subtitle": "Period close, bill confirm, and payments",
+  "pageGuide": "Credit-line agent periods: site finance opens/closes; bound agents view own bills and record payments as payee only.",
   "subtitleList": "Period list: open/close periods; summary columns included — use row actions for bills and bet ledger.",
   "period": {
     "title": "Period",