fix: add search and groupHeadIds support to RM group export functionality

src/app/(dashboard)/finance/rm-pricing/groups/rm-groups-page-client.tsx

@@ -59,9 +59,14 @@ function RMGroupsPageContent() {
   const exportMutation = useExportRMGroups()
 
   const handleExport = () => {
-    // Export respects the active_filter only (search is UI-level; the backend
-    // Export RPC intentionally does not accept search params).
-    exportMutation.mutate({ activeFilter: filters.activeFilter })
+    // Export honors active_filter + search from the list-page filters.
+    // Selected-mode (group_head_ids) is exposed via the BFF route for
+    // programmatic callers; the list page itself doesn't expose multi-select
+    // export (yet) — Filtered + All cover the bulk-migration workflow.
+    exportMutation.mutate({
+      activeFilter: filters.activeFilter,
+      search: filters.search,
+    })
   }
 
   // Use isFetching (not isLoading) so background refetches triggered on

src/app/api/v1/finance/rm-groups/export/route.ts

@@ -9,9 +9,20 @@ export async function GET(request: NextRequest) {
     const metadata = createMetadataFromRequest(request)
     const client = getRmGroupClient()
 
+    // Comma-separated list of group_head_id UUIDs for the "Selected" mode.
+    const idsParam = searchParams.get("group_head_ids") || searchParams.get("groupHeadIds") || ""
+    const groupHeadIds = idsParam
+      ? idsParam
+          .split(",")
+          .map((s) => s.trim())
+          .filter(Boolean)
+      : []
     const response = await client.exportRMGroups(
       {
-        activeFilter: Number(searchParams.get("activeFilter") || searchParams.get("active_filter")) || 0,
+        activeFilter:
+          Number(searchParams.get("activeFilter") || searchParams.get("active_filter")) || 0,
+        search: searchParams.get("search") || "",
+        groupHeadIds,
       },
       metadata
     )

src/types/finance/rm-group.ts

@@ -133,6 +133,12 @@ export interface ListUngroupedItemsParams {
 
 export interface ExportRMGroupsParams {
   activeFilter?: ActiveFilter
+  /** Free-text search across code/name/description (Filtered mode). */
+  search?: string
+  /** Explicit group_head_id list (Selected mode). When non-empty overrides
+   *  activeFilter and search at the backend. Sent as `group_head_ids` query
+   *  param (comma-separated UUIDs). */
+  groupHeadIds?: string[]
 }
 
 // Form data for group head create/edit