fix: honor table search q param on users and related lists

Dashboard sends q, but users/classes/payments ignored it; accept q/search and normalize Persian digits.

utils/pagination.js

@@ -22,7 +22,27 @@ const parsePaginationAndSort = (query, defaultSortBy = 'createdAt', defaultSortO
   };
 };
 
-const buildFilterQuery = (query, searchFields = [], excludedKeys = ['page', 'limit', 'sortBy', 'sortOrder', 'q', 'lang']) => {
+const escapeRegex = (value) => String(value).replace(/[.*+?^${}()|[\]\\]/g, '\\$&');
+
+const toLatinDigits = (value) => {
+  if (value == null) return '';
+  const persian = '۰۱۲۳۴۵۶۷۸۹';
+  const arabic = '٠١٢٣٤٥٦٧٨٩';
+  return String(value).replace(/[۰-۹٠-٩]/g, (ch) => {
+    const p = persian.indexOf(ch);
+    if (p >= 0) return String(p);
+    const a = arabic.indexOf(ch);
+    return a >= 0 ? String(a) : ch;
+  });
+};
+
+const getSearchTerm = (query) => {
+  const raw = query?.q || query?.search;
+  if (raw == null || String(raw).trim() === '') return '';
+  return toLatinDigits(String(raw).trim());
+};
+
+const buildFilterQuery = (query, searchFields = [], excludedKeys = ['page', 'limit', 'sortBy', 'sortOrder', 'q', 'search', 'lang']) => {
   const filter = {};
 
   // Build field-based exact or boolean filters
@@ -41,9 +61,10 @@ const buildFilterQuery = (query, searchFields = [], excludedKeys = ['page', 'lim
     }
   });
 
-  // Build regex search for ?q= across defined text fields
-  if (query.q && searchFields.length > 0) {
-    const searchRegex = new RegExp(query.q, 'i');
+  // Build regex search for ?q= or ?search= across defined text fields
+  const searchTerm = getSearchTerm(query);
+  if (searchTerm && searchFields.length > 0) {
+    const searchRegex = new RegExp(escapeRegex(searchTerm), 'i');
     filter.$or = searchFields.map((field) => ({
       [field]: searchRegex
     }));
@@ -65,5 +86,8 @@ const calculateMeta = (totalCount, page, limit) => {
 module.exports = {
   parsePaginationAndSort,
   buildFilterQuery,
-  calculateMeta
+  calculateMeta,
+  escapeRegex,
+  toLatinDigits,
+  getSearchTerm
 };