fix: 处理 banner配置页面相关问题

src/utils/areaData.ts

@@ -131,3 +131,73 @@ export function parseAreaToCascaderPath(area: string): string[] {
   if (!area) return [];
   return area.split('-');
 }
+
+// ============================================================
+// 城市级别选项（仅市名，加"全国"）
+// ============================================================
+
+/** 城市 Select 选项 */
+export interface CityOption {
+  value: string;
+  label: string;
+}
+
+/**
+ * 获取仅城市名的选项列表，第一项为"全国"
+ * 用于 Banner 弹窗中"所属区域"下拉选择
+ * - 直辖市：直接取市名（如"北京市"）
+ * - 普通省份：取市名（如"深圳市"）
+ */
+export function getCityOnlyOptions(): CityOption[] {
+  const options: CityOption[] = [{ value: '全国', label: '全国' }];
+  const provinces = areaData['86'];
+  if (!provinces) return options;
+
+  for (const [provinceCode, provinceName] of Object.entries(provinces)) {
+    if (MUNICIPALITY_CODES.includes(provinceCode)) {
+      options.push({ value: provinceName as string, label: provinceName as string });
+    } else {
+      const cities = areaData[provinceCode];
+      if (cities) {
+        for (const [, cityName] of Object.entries(cities)) {
+          options.push({ value: cityName as string, label: cityName as string });
+        }
+      }
+    }
+  }
+
+  return options;
+}
+
+/**
+ * 根据城市名反查 Cascader 路径数组
+ * "深圳市" → ["广东省", "深圳市"]
+ * "北京市" → ["北京市"]
+ * "全国" → ["全国"]
+ */
+export function cityNameToCascaderPath(cityName: string): string[] {
+  if (!cityName || cityName === '全国') return ['全国'];
+
+  const provinces = areaData['86'];
+  if (!provinces) return [cityName];
+
+  for (const [provinceCode, provinceName] of Object.entries(provinces)) {
+    const pname = provinceName as string;
+
+    if (MUNICIPALITY_CODES.includes(provinceCode)) {
+      if (pname === cityName) return [pname];
+    } else {
+      const cities = areaData[provinceCode];
+      if (cities) {
+        for (const [, cname] of Object.entries(cities)) {
+          if ((cname as string) === cityName) {
+            return [pname, cname as string];
+          }
+        }
+      }
+    }
+  }
+
+  // 兜底：找不到省份隶属，直接用市名
+  return [cityName];
+}