📚 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/FaqPanel.jsx

@@ -0,0 +1,81 @@
+/*
+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, Collapse, Empty } from '@douyinfe/semi-ui';
+import { HelpCircle } from 'lucide-react';
+import { IconPlus, IconMinus } from '@douyinfe/semi-icons';
+import { marked } from 'marked';
+import { IllustrationConstruction, IllustrationConstructionDark } from '@douyinfe/semi-illustrations';
+import ScrollableContainer from '../common/ui/ScrollableContainer';
+
+const FaqPanel = ({
+  faqData,
+  CARD_PROPS,
+  FLEX_CENTER_GAP2,
+  ILLUSTRATION_SIZE,
+  t
+}) => {
+  return (
+    <Card
+      {...CARD_PROPS}
+      className="shadow-sm !rounded-2xl lg:col-span-1"
+      title={
+        <div className={FLEX_CENTER_GAP2}>
+          <HelpCircle size={16} />
+          {t('常见问答')}
+        </div>
+      }
+      bodyStyle={{ padding: 0 }}
+    >
+      <ScrollableContainer maxHeight="24rem">
+        {faqData.length > 0 ? (
+          <Collapse
+            accordion
+            expandIcon={<IconPlus />}
+            collapseIcon={<IconMinus />}
+          >
+            {faqData.map((item, index) => (
+              <Collapse.Panel
+                key={index}
+                header={item.question}
+                itemKey={index.toString()}
+              >
+                <div
+                  dangerouslySetInnerHTML={{ __html: marked.parse(item.answer || '') }}
+                />
+              </Collapse.Panel>
+            ))}
+          </Collapse>
+        ) : (
+          <div className="flex justify-center items-center py-8">
+            <Empty
+              image={<IllustrationConstruction style={ILLUSTRATION_SIZE} />}
+              darkModeImage={<IllustrationConstructionDark style={ILLUSTRATION_SIZE} />}
+              title={t('暂无常见问答')}
+              description={t('请联系管理员在系统设置中配置常见问答')}
+            />
+          </div>
+        )}
+      </ScrollableContainer>
+    </Card>
+  );
+};
+
+export default FaqPanel;