feat(date-picker): 添加默认时间设置以优化日期范围选择

- 在日期选择器中引入默认时间设置，开始时间为00:00:00，结束时间为23:59:59，提升用户体验
- 增加normalizeMarketingEndTime函数，确保在导出时将结束时间的00:00:00标准化为23:59:59
- 更新相关逻辑以支持新的时间处理，确保日期范围选择的准确性和灵活性

web/index.html

@@ -247,6 +247,7 @@
               end-placeholder="结束时间"
               value-format="YYYY-MM-DD HH:mm:ss"
               :shortcuts="dateShortcuts"
+              :default-time="dateDefaultTime"
               style="width:100%"
             />
           </el-form-item>

web/main.js

@@ -181,6 +181,12 @@ const app = createApp({
     const exportRules = ValidationRules.createExportRules();
 
     // ==================== 时间快捷选项 ====================
+    // Element Plus datetimerange 默认时间：开始 00:00:00，结束 23:59:59（仅用于 UI 默认显示）
+    const dateDefaultTime = [
+      new Date(2000, 0, 1, 0, 0, 0),
+      new Date(2000, 0, 1, 23, 59, 59),
+    ];
+
     const dateShortcuts = [
       {
         text: '本日',
@@ -666,8 +672,23 @@ const app = createApp({
           filters.type_eq = Number(typeValue);
         }
 
+        const normalizeMarketingEndTime = (endStr) => {
+          const s = String(endStr || '').trim();
+          if (!s) return s;
+          // value-format is 'YYYY-MM-DD HH:mm:ss' so we just normalize "00:00:00" to end-of-day for marketing exports
+          if (s.length >= 19 && s.slice(11, 19) === '00:00:00') {
+            return s.slice(0, 10) + ' 23:59:59';
+          }
+          return s;
+        };
+
         if (dateRange?.length === 2) {
-          filters.create_time_between = [dateRange[0], dateRange[1]];
+          const start = String(dateRange[0] || '').trim();
+          let end = String(dateRange[1] || '').trim();
+          if (datasource === 'marketing') {
+            end = normalizeMarketingEndTime(end);
+          }
+          filters.create_time_between = [start, end];
         }
 
         if (planId) filters.plan_id_eq = Number(planId);
@@ -976,6 +997,7 @@ const app = createApp({
       createRules,
       editRules,
       exportRules,
+      dateDefaultTime,
       dateShortcuts,
       // 表单引用
       createFormRef,