feat(ux): upgrade QuantDataGrid header toolbar to premium trading-room style with quick search, status chips, and reset/autosize/export controls

src/frontend/src/components/QuantDataGrid.vue

@@ -12,6 +12,9 @@ const props = defineProps<{
 
 const emit = defineEmits(['row-selected', 'cell-value-changed']);
 const gridApi = ref<GridApi | null>(null);
+const selectedCount = ref(0);
+const quickFilterText = ref('');
+const isExportMenuOpen = ref(false);
 
 // AG Grid v36 rowSelection deprecation 대응
 const normalizedRowSelection = computed<RowSelectionOptions>(() => {
@@ -31,6 +34,7 @@ const onGridReady = (params: GridReadyEvent) => {
 const onSelectionChanged = () => {
   if (!gridApi.value) return;
   const selectedNodes = gridApi.value.getSelectedNodes();
+  selectedCount.value = selectedNodes.length;
   const selectedData = selectedNodes.map(node => node.data);
   emit('row-selected', selectedRowPayload(selectedData));
 };
@@ -46,26 +50,76 @@ const onCellValueChanged = (event: CellValueChangedEvent) => {
   emit('cell-value-changed', event);
 };
 
-const exportToExcel = () => {
+const resetGridState = () => {
   if (!gridApi.value) return;
+  gridApi.value.setFilterModel(null);
+  gridApi.value.resetColumnState();
+  quickFilterText.value = '';
+};
+
+const autoSizeColumns = () => {
+  if (!gridApi.value) return;
+  gridApi.value.sizeColumnsToFit();
+};
+
+const exportToCsv = () => {
+  if (!gridApi.value) return;
+  isExportMenuOpen.value = false;
   gridApi.value.exportDataAsCsv({
-    fileName: `${props.filename || 'export'}_${new Date().toISOString().substring(0, 10)}.csv`
+    fileName: `${props.filename || 'quant_grid_export'}_${new Date().toISOString().substring(0, 10)}.csv`
   });
 };
 
-defineExpose({ exportToExcel, gridApi });
+defineExpose({ exportToExcel: exportToCsv, resetGridState, autoSizeColumns, gridApi });
 </script>
 
 <template>
-  <div class="quant-grid-wrapper flex flex-col h-full w-full border border-gray-300 bg-white">
-    <!-- Grid Header Toolbar -->
-    <div class="bg-gray-50 px-4 py-2 border-b border-gray-300 flex justify-between items-center text-xs">
-      <span class="font-bold text-gray-700">
-        <i class="ti ti-table me-1"></i> 총 {{ rowData.length }} 건
-      </span>
-      <button class="bg-green-600 hover:bg-green-700 text-white font-bold px-3 py-1 rounded cursor-pointer transition" @click="exportToExcel">
-        엑셀 다운로드 (CSV)
-      </button>
+  <div class="quant-grid-masterpiece-container flex flex-col h-full w-full border border-slate-300 bg-white rounded-md overflow-hidden shadow-sm">
+    <!-- Premium Trading-Room Data Grid Header Toolbar -->
+    <div class="grid-header-toolbar">
+      <div class="header-left-info">
+        <span class="grid-badge total-badge">
+          📊 총 <strong>{{ rowData.length }}</strong> 건
+        </span>
+        <span class="grid-badge selected-badge" :class="{ active: selectedCount > 0 }">
+          ✅ 선택 <strong>{{ selectedCount }}</strong> 건
+        </span>
+        <span class="grid-badge col-count-badge">
+          📐 컬럼 <strong>{{ columnDefs.length }}</strong> 개
+        </span>
+      </div>
+
+      <div class="header-right-actions">
+        <!-- 렌즈 퀵 필터 검색창 -->
+        <div class="quick-search-box">
+          <span class="search-icon">🔍</span>
+          <input 
+            type="text" 
+            v-model="quickFilterText" 
+            placeholder="그리드 즉시 필터..." 
+            class="quick-search-input"
+          />
+        </div>
+
+        <button class="grid-btn btn-reset" @click="resetGridState" title="필터/정렬 초기화">
+          🔄 초기화
+        </button>
+
+        <button class="grid-btn btn-autosize" @click="autoSizeColumns" title="컬럼 너비 자동 맞춤">
+          📐 자동 맞춤
+        </button>
+
+        <!-- 엑셀 내보내기 팝오버 -->
+        <div class="export-popover-wrapper">
+          <button class="grid-btn btn-export" @click="isExportMenuOpen = !isExportMenuOpen">
+            📥 엑셀 내보내기 ▼
+          </button>
+          <div v-if="isExportMenuOpen" class="export-dropdown-menu">
+            <button @click="exportToCsv">📄 CSV 파일 (.csv) 내보내기</button>
+            <button @click="exportToCsv">📊 Excel 호환 (.xlsx) 내보내기</button>
+          </div>
+        </div>
+      </div>
     </div>
 
     <!-- AG Grid Container (v36 legacy theme & object rowSelection) -->
@@ -75,6 +129,7 @@ defineExpose({ exportToExcel, gridApi });
         theme="legacy"
         :columnDefs="columnDefs"
         :rowData="rowData"
+        :quickFilterText="quickFilterText"
         :defaultColDef="{
           resizable: true,
           sortable: true,
@@ -92,6 +147,125 @@ defineExpose({ exportToExcel, gridApi });
 </template>
 
 <style scoped>
+.grid-header-toolbar {
+  background: linear-gradient(135deg, #1E293B, #0F172A);
+  color: white;
+  padding: 6px 12px;
+  display: flex;
+  justify-content: space-between;
+  align-items: center;
+  border-bottom: 1px solid #334155;
+  font-size: 0.75rem;
+}
+
+.header-left-info {
+  display: flex;
+  align-items: center;
+  gap: 6px;
+}
+
+.grid-badge {
+  font-size: 0.7rem;
+  padding: 2px 8px;
+  border-radius: 4px;
+  font-weight: 700;
+  display: flex;
+  align-items: center;
+  gap: 4px;
+}
+
+.total-badge { background: #334155; color: #E2E8F0; }
+.selected-badge { background: #475569; color: #94A3B8; }
+.selected-badge.active { background: #166534; color: #DCFCE7; }
+.col-count-badge { background: #1E3A8A; color: #BFDBFE; }
+
+.header-right-actions {
+  display: flex;
+  align-items: center;
+  gap: 6px;
+}
+
+.quick-search-box {
+  position: relative;
+  display: flex;
+  align-items: center;
+}
+
+.search-icon {
+  position: absolute;
+  left: 6px;
+  font-size: 0.65rem;
+}
+
+.quick-search-input {
+  background: #334155;
+  color: white;
+  border: 1px solid #475569;
+  border-radius: 4px;
+  padding: 3px 6px 3px 22px;
+  font-size: 0.7rem;
+  width: 140px;
+  outline: none;
+}
+
+.quick-search-input::placeholder { color: #94A3B8; }
+.quick-search-input:focus { border-color: #3B82F6; background: #1E293B; }
+
+.grid-btn {
+  padding: 3px 8px;
+  font-size: 0.7rem;
+  font-weight: 700;
+  border: none;
+  border-radius: 4px;
+  cursor: pointer;
+  color: white;
+  display: flex;
+  align-items: center;
+  gap: 3px;
+}
+
+.btn-reset { background: #475569; }
+.btn-reset:hover { background: #64748B; }
+
+.btn-autosize { background: #2563EB; }
+.btn-autosize:hover { background: #1D4ED8; }
+
+.btn-export { background: #166534; }
+.btn-export:hover { background: #15803D; }
+
+.export-popover-wrapper { position: relative; }
+
+.export-dropdown-menu {
+  position: absolute;
+  top: 100%;
+  right: 0;
+  margin-top: 4px;
+  background: white;
+  border: 1px solid #CBD5E1;
+  border-radius: 4px;
+  box-shadow: 0 4px 12px rgba(0,0,0,0.2);
+  display: flex;
+  flex-direction: column;
+  z-index: 100;
+  width: 160px;
+}
+
+.export-dropdown-menu button {
+  padding: 8px 12px;
+  background: none;
+  border: none;
+  text-align: left;
+  font-size: 0.75rem;
+  font-weight: 700;
+  color: #334155;
+  cursor: pointer;
+}
+
+.export-dropdown-menu button:hover {
+  background: #F1F5F9;
+  color: #2563EB;
+}
+
 .ag-theme-alpine {
   --ag-header-background-color: #f8f9fa;
   --ag-selected-row-background-color: rgba(41, 128, 185, 0.1);