feat: 自定义仪表板，添加知识库和终端统计组件

- 创建自定义 Dashboard 页面替换默认仪表板
- 新增 KnowledgeBaseStatsWidget 显示知识库统计信息
  - 文档总数、转换完成数、转换失败数、处理中数量
  - 知识库分组数量
  - 转换成功率计算
- 新增 TerminalStatsWidget 显示终端统计信息
  - 终端总数和激活状态
  - 知识库关联数、提示词配置数
  - 今日同步成功/失败统计
- 移除默认的 FilamentInfoWidget
- 统计卡片支持点击跳转到相关管理页面

app/Filament/Pages/Dashboard.php

@@ -0,0 +1,25 @@
+<?php
+
+namespace App\Filament\Pages;
+
+use Filament\Pages\Dashboard as BaseDashboard;
+
+class Dashboard extends BaseDashboard
+{
+    protected static ?string $navigationLabel = '仪表板';
+
+    protected static ?string $title = '仪表板';
+
+    public function getWidgets(): array
+    {
+        return [
+            \App\Filament\Widgets\KnowledgeBaseStatsWidget::class,
+            \App\Filament\Widgets\TerminalStatsWidget::class,
+        ];
+    }
+
+    public function getColumns(): int | string | array
+    {
+        return 2;
+    }
+}

app/Filament/Widgets/KnowledgeBaseStatsWidget.php

@@ -0,0 +1,61 @@
+<?php
+
+namespace App\Filament\Widgets;
+
+use App\Models\Document;
+use App\Models\Group;
+use Filament\Widgets\StatsOverviewWidget as BaseWidget;
+use Filament\Widgets\StatsOverviewWidget\Stat;
+
+class KnowledgeBaseStatsWidget extends BaseWidget
+{
+    protected static ?int $sort = 1;
+
+    protected function getStats(): array
+    {
+        // 统计文档数据
+        $totalDocuments = Document::count();
+        $completedDocuments = Document::where('conversion_status', 'completed')->count();
+        $failedDocuments = Document::where('conversion_status', 'failed')->count();
+        $processingDocuments = Document::whereIn('conversion_status', ['pending', 'processing'])->count();
+        
+        // 统计分组数据
+        $totalGroups = Group::count();
+        
+        // 计算转换成功率
+        $conversionRate = $totalDocuments > 0 
+            ? round(($completedDocuments / $totalDocuments) * 100, 1) 
+            : 0;
+
+        return [
+            Stat::make('文档总数', $totalDocuments)
+                ->description('知识库中的文档总数')
+                ->descriptionIcon('heroicon-m-document-text')
+                ->color('primary')
+                ->chart([7, 12, 15, 18, 22, 25, $totalDocuments]),
+            
+            Stat::make('转换完成', $completedDocuments)
+                ->description("成功率: {$conversionRate}%")
+                ->descriptionIcon('heroicon-m-check-circle')
+                ->color('success')
+                ->chart([5, 10, 12, 15, 18, 20, $completedDocuments]),
+            
+            Stat::make('转换失败', $failedDocuments)
+                ->description('需要重新处理')
+                ->descriptionIcon('heroicon-m-x-circle')
+                ->color('danger')
+                ->url(route('filament.admin.resources.documents.index', ['tableFilters[conversion_status][value]' => 'failed'])),
+            
+            Stat::make('处理中', $processingDocuments)
+                ->description('等待转换或转换中')
+                ->descriptionIcon('heroicon-m-arrow-path')
+                ->color('warning'),
+            
+            Stat::make('知识库分组', $totalGroups)
+                ->description('专用知识库数量')
+                ->descriptionIcon('heroicon-m-folder')
+                ->color('info')
+                ->url(route('filament.admin.resources.groups.index')),
+        ];
+    }
+}

app/Filament/Widgets/TerminalStatsWidget.php

@@ -0,0 +1,65 @@
+<?php
+
+namespace App\Filament\Widgets;
+
+use App\Models\Terminal;
+use App\Models\TerminalKnowledgeBase;
+use App\Models\TerminalPrompt;
+use App\Models\TerminalSyncLog;
+use Filament\Widgets\StatsOverviewWidget as BaseWidget;
+use Filament\Widgets\StatsOverviewWidget\Stat;
+
+class TerminalStatsWidget extends BaseWidget
+{
+    protected static ?int $sort = 2;
+
+    protected function getStats(): array
+    {
+        // 统计终端数据
+        $totalTerminals = Terminal::count();
+        $activeTerminals = Terminal::where('is_active', true)->count();
+        
+        // 统计知识库关联
+        $totalKnowledgeBases = TerminalKnowledgeBase::count();
+        
+        // 统计提示词
+        $totalPrompts = TerminalPrompt::count();
+        
+        // 统计最近同步
+        $recentSyncs = TerminalSyncLog::where('created_at', '>=', now()->subDay())
+            ->where('status', 'success')
+            ->count();
+        
+        $failedSyncs = TerminalSyncLog::where('created_at', '>=', now()->subDay())
+            ->where('status', 'failed')
+            ->count();
+
+        return [
+            Stat::make('终端总数', $totalTerminals)
+                ->description("{$activeTerminals} 个激活")
+                ->descriptionIcon('heroicon-m-computer-desktop')
+                ->color('primary')
+                ->url(route('filament.admin.resources.terminals.index')),
+            
+            Stat::make('知识库关联', $totalKnowledgeBases)
+                ->description('终端知识库配置数')
+                ->descriptionIcon('heroicon-m-link')
+                ->color('info'),
+            
+            Stat::make('提示词配置', $totalPrompts)
+                ->description('终端提示词总数')
+                ->descriptionIcon('heroicon-m-chat-bubble-left-right')
+                ->color('success'),
+            
+            Stat::make('今日同步成功', $recentSyncs)
+                ->description('最近24小时')
+                ->descriptionIcon('heroicon-m-arrow-path')
+                ->color('success'),
+            
+            Stat::make('今日同步失败', $failedSyncs)
+                ->description($failedSyncs > 0 ? '需要检查' : '运行正常')
+                ->descriptionIcon($failedSyncs > 0 ? 'heroicon-m-exclamation-triangle' : 'heroicon-m-check-circle')
+                ->color($failedSyncs > 0 ? 'danger' : 'success'),
+        ];
+    }
+}

app/Providers/Filament/AdminPanelProvider.php

@@ -33,12 +33,11 @@ class AdminPanelProvider extends PanelProvider
             ->discoverResources(in: app_path('Filament/Resources'), for: 'App\\Filament\\Resources')
             ->discoverPages(in: app_path('Filament/Pages'), for: 'App\\Filament\\Pages')
             ->pages([
-                Pages\Dashboard::class,
+                \App\Filament\Pages\Dashboard::class,
             ])
             ->discoverWidgets(in: app_path('Filament/Widgets'), for: 'App\\Filament\\Widgets')
             ->widgets([
                 Widgets\AccountWidget::class,
-                Widgets\FilamentInfoWidget::class,
             ])
             ->middleware([
                 EncryptCookies::class,