📚 refactor(dashboard): modularize dashboard page into reusable hooks and components

## Overview
Refactored the monolithic dashboard page (~1200 lines) into a modular architecture following the project's global layout pattern. The main `Detail/index.js` is now simplified to match other page entry files like `Midjourney/index.js`.

## Changes Made

### 🏗️ Architecture Changes
- **Before**: Single large file `pages/Detail/index.js` containing all dashboard logic
- **After**: Modular structure with dedicated hooks, components, and helpers

### 📁 New Files Created
- `hooks/dashboard/useDashboardData.js` - Core data management and API calls
- `hooks/dashboard/useDashboardStats.js` - Statistics computation and memoization
- `hooks/dashboard/useDashboardCharts.js` - Chart specifications and data processing
- `constants/dashboard.constants.js` - UI config, time options, and chart defaults
- `helpers/dashboard.js` - Utility functions for data processing and UI helpers
- `components/dashboard/index.jsx` - Main dashboard component integrating all modules
- `components/dashboard/modals/SearchModal.jsx` - Search modal component

### 🔧 Updated Files
- `constants/index.js` - Added dashboard constants export
- `helpers/index.js` - Added dashboard helpers export
- `pages/Detail/index.js` - Simplified to minimal wrapper (~20 lines)

### 🐛 Bug Fixes
- Fixed SearchModal DatePicker onChange to properly convert Date objects to timestamp strings
- Added missing localStorage update for `data_export_default_time` persistence
- Corrected data flow between search confirmation and chart updates
- Ensured proper chart data refresh after search parameter changes

### ✨ Key Improvements
- **Separation of Concerns**: Data, stats, and charts logic isolated into dedicated hooks
- **Reusability**: Components and hooks can be easily reused across the application
- **Maintainability**: Smaller, focused files easier to understand and modify
- **Consistency**: Follows established project patterns for global folder organization
- **Performance**: Proper memoization and callback optimization maintained

### 🎯 Functional Verification
- ✅ All dashboard panels (model analysis, resource consumption, performance metrics) update correctly
- ✅ Search functionality works with proper parameter validation
- ✅ Chart data refreshes properly after search/filter operations
- ✅ User interface remains identical to original implementation
- ✅ All existing features preserved without regression

### 🔄 Data Flow
```
User Input → SearchModal → useDashboardData → API Call → useDashboardCharts → UI Update
```

## Breaking Changes
None. All existing functionality preserved.

## Migration Notes
The refactored dashboard maintains 100% API compatibility and identical user experience while providing a cleaner, more maintainable codebase structure.

web/src/components/dashboard/UptimePanel.jsx

@@ -0,0 +1,136 @@
+/*
+Copyright (C) 2025 QuantumNous
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU Affero General Public License as
+published by the Free Software Foundation, either version 3 of the
+License, or (at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU Affero General Public License for more details.
+
+You should have received a copy of the GNU Affero General Public License
+along with this program. If not, see <https://www.gnu.org/licenses/>.
+
+For commercial licensing, please contact support@quantumnous.com
+*/
+
+import React from 'react';
+import { Card, Button, Spin, Tabs, TabPane, Tag, Empty } from '@douyinfe/semi-ui';
+import { Gauge } from 'lucide-react';
+import { IconRefresh } from '@douyinfe/semi-icons';
+import { IllustrationConstruction, IllustrationConstructionDark } from '@douyinfe/semi-illustrations';
+import ScrollableContainer from '../common/ui/ScrollableContainer';
+
+const UptimePanel = ({
+  uptimeData,
+  uptimeLoading,
+  activeUptimeTab,
+  setActiveUptimeTab,
+  loadUptimeData,
+  uptimeLegendData,
+  renderMonitorList,
+  CARD_PROPS,
+  ILLUSTRATION_SIZE,
+  t
+}) => {
+  return (
+    <Card
+      {...CARD_PROPS}
+      className="shadow-sm !rounded-2xl lg:col-span-1"
+      title={
+        <div className="flex items-center justify-between w-full gap-2">
+          <div className="flex items-center gap-2">
+            <Gauge size={16} />
+            {t('服务可用性')}
+          </div>
+          <Button
+            icon={<IconRefresh />}
+            onClick={loadUptimeData}
+            loading={uptimeLoading}
+            size="small"
+            theme="borderless"
+            type='tertiary'
+            className="text-gray-500 hover:text-blue-500 hover:bg-blue-50 !rounded-full"
+          />
+        </div>
+      }
+      bodyStyle={{ padding: 0 }}
+    >
+      {/* 内容区域 */}
+      <div className="relative">
+        <Spin spinning={uptimeLoading}>
+          {uptimeData.length > 0 ? (
+            uptimeData.length === 1 ? (
+              <ScrollableContainer maxHeight="24rem">
+                {renderMonitorList(uptimeData[0].monitors)}
+              </ScrollableContainer>
+            ) : (
+              <Tabs
+                type="card"
+                collapsible
+                activeKey={activeUptimeTab}
+                onChange={setActiveUptimeTab}
+                size="small"
+              >
+                {uptimeData.map((group, groupIdx) => (
+                  <TabPane
+                    tab={
+                      <span className="flex items-center gap-2">
+                        <Gauge size={14} />
+                        {group.categoryName}
+                        <Tag
+                          color={activeUptimeTab === group.categoryName ? 'red' : 'grey'}
+                          size='small'
+                          shape='circle'
+                        >
+                          {group.monitors ? group.monitors.length : 0}
+                        </Tag>
+                      </span>
+                    }
+                    itemKey={group.categoryName}
+                    key={groupIdx}
+                  >
+                    <ScrollableContainer maxHeight="21.5rem">
+                      {renderMonitorList(group.monitors)}
+                    </ScrollableContainer>
+                  </TabPane>
+                ))}
+              </Tabs>
+            )
+          ) : (
+            <div className="flex justify-center items-center py-8">
+              <Empty
+                image={<IllustrationConstruction style={ILLUSTRATION_SIZE} />}
+                darkModeImage={<IllustrationConstructionDark style={ILLUSTRATION_SIZE} />}
+                title={t('暂无监控数据')}
+                description={t('请联系管理员在系统设置中配置Uptime')}
+              />
+            </div>
+          )}
+        </Spin>
+      </div>
+
+      {/* 图例 */}
+      {uptimeData.length > 0 && (
+        <div className="p-3 bg-gray-50 rounded-b-2xl">
+          <div className="flex flex-wrap gap-3 text-xs justify-center">
+            {uptimeLegendData.map((legend, index) => (
+              <div key={index} className="flex items-center gap-1">
+                <div
+                  className="w-2 h-2 rounded-full"
+                  style={{ backgroundColor: legend.color }}
+                />
+                <span className="text-gray-600">{legend.label}</span>
+              </div>
+            ))}
+          </div>
+        </div>
+      )}
+    </Card>
+  );
+};
+
+export default UptimePanel;