perf(admin): full-stack performance optimization for all list tables

- Implemented server-side search, infinite scrolling, and list virtualization for Tenants, Users, and Audit Logs.
- Backend: Enhanced Repository, Service, and Handler layers to support 'search' and 'cursor' parameters.
- Frontend: Integrated @tanstack/react-virtual and useInfiniteQuery for high-performance rendering.
- Quality: Updated all unit tests and E2E tests to match the new asynchronous server-side search architecture.
- i18n: Synced all translation keys and cleaned up unused resources.

backend/internal/handler/user_handler.go

@@ -1614,7 +1614,14 @@ func (h *UserHandler) ExportUsersCSV(c *fiber.Ctx) error {
 	}
 
 	// 1. Fetch Users using Repo for efficiency
-	users, _, _, err := h.UserRepo.List(c.Context(), 0, 10000, search, tenantSlug, "")
+	var exportTenantIDs []string
+	if tenantSlug != "" && h.TenantService != nil {
+		t, err := h.TenantService.GetTenantBySlug(c.Context(), tenantSlug)
+		if err == nil && t != nil {
+			exportTenantIDs = []string{t.ID}
+		}
+	}
+	users, _, _, err := h.UserRepo.List(c.Context(), 0, 10000, search, exportTenantIDs, "")
 	if err != nil {
 		return errorJSON(c, fiber.StatusInternalServerError, "failed to fetch users for export")
 	}