feat: 添加视频切分片段查看功能

新增功能：
1. MaterialCard组件 - 增强的素材卡片
   - 显示素材基本信息和状态
   - 支持展开查看切分片段详情
   - 片段时间格式化显示
   - 文件位置快速访问

2. get_material_segments命令
   - 获取指定素材的所有切分片段
   - 返回完整的片段信息包括文件路径

3. 前端store集成
   - getMaterialSegments方法
   - 错误处理和加载状态

4. 用户界面改进
   - 状态颜色编码（完成/处理中/失败/等待）
   - 可折叠的片段列表
   - 时间格式化显示（分:秒）
   - 片段索引和时长信息

视频切分结果保存位置：
- 文件系统: 原视频路径_segments/原视频名_001.mp4
- 数据库: material_segments表存储片段元信息
- 前端: 通过MaterialCard组件可视化查看

现在用户可以：
 查看每个素材的切分状态
 展开查看具体的切分片段
 了解每个片段的时间范围和文件位置
 快速访问切分后的文件

apps/desktop/src-tauri/src/lib.rs

@@ -57,7 +57,8 @@ pub fn run() {
             commands::material_commands::extract_file_metadata,
             commands::material_commands::detect_video_scenes,
             commands::material_commands::generate_video_thumbnail,
-            commands::material_commands::test_scene_detection
+            commands::material_commands::test_scene_detection,
+            commands::material_commands::get_material_segments
         ])
         .setup(|app| {
             // 初始化应用状态

apps/desktop/src-tauri/src/presentation/commands/material_commands.rs

@@ -341,3 +341,19 @@ pub async fn test_scene_detection(file_path: String) -> Result<String, String> {
 
     Ok(result)
 }
+
+/// 获取素材的切分片段信息命令
+#[command]
+pub async fn get_material_segments(
+    state: State<'_, AppState>,
+    material_id: String,
+) -> Result<Vec<crate::data::models::material::MaterialSegment>, String> {
+    let repository_guard = state.get_material_repository()
+        .map_err(|e| format!("获取素材仓库失败: {}", e))?;
+
+    let repository = repository_guard.as_ref()
+        .ok_or("素材仓库未初始化")?;
+
+    repository.get_segments(&material_id)
+        .map_err(|e| e.to_string())
+}

apps/desktop/src/components/MaterialCard.tsx

@@ -0,0 +1,157 @@
+import React, { useState, useEffect } from 'react';
+import { FileVideo, FileAudio, FileImage, File, Clock, ExternalLink, ChevronDown, ChevronUp } from 'lucide-react';
+import { Material, MaterialSegment } from '../types/material';
+import { useMaterialStore } from '../store/materialStore';
+
+interface MaterialCardProps {
+  material: Material;
+}
+
+/**
+ * 素材卡片组件
+ * 显示素材信息和切分片段
+ */
+export const MaterialCard: React.FC<MaterialCardProps> = ({ material }) => {
+  const { getMaterialSegments } = useMaterialStore();
+  const [segments, setSegments] = useState<MaterialSegment[]>([]);
+  const [showSegments, setShowSegments] = useState(false);
+  const [loadingSegments, setLoadingSegments] = useState(false);
+
+  // 获取素材类型图标
+  const getTypeIcon = (type: string) => {
+    switch (type) {
+      case 'Video':
+        return <FileVideo className="w-4 h-4" />;
+      case 'Audio':
+        return <FileAudio className="w-4 h-4" />;
+      case 'Image':
+        return <FileImage className="w-4 h-4" />;
+      default:
+        return <File className="w-4 h-4" />;
+    }
+  };
+
+  // 获取状态颜色
+  const getStatusColor = (status: string) => {
+    switch (status) {
+      case 'Completed':
+        return 'text-green-600 bg-green-50';
+      case 'Processing':
+        return 'text-blue-600 bg-blue-50';
+      case 'Failed':
+        return 'text-red-600 bg-red-50';
+      case 'Pending':
+        return 'text-yellow-600 bg-yellow-50';
+      default:
+        return 'text-gray-600 bg-gray-50';
+    }
+  };
+
+  // 格式化时间
+  const formatTime = (seconds: number) => {
+    const minutes = Math.floor(seconds / 60);
+    const remainingSeconds = Math.floor(seconds % 60);
+    return `${minutes}:${remainingSeconds.toString().padStart(2, '0')}`;
+  };
+
+  // 加载切分片段
+  const loadSegments = async () => {
+    if (segments.length > 0) {
+      setShowSegments(!showSegments);
+      return;
+    }
+
+    setLoadingSegments(true);
+    try {
+      const materialSegments = await getMaterialSegments(material.id);
+      setSegments(materialSegments);
+      setShowSegments(true);
+    } catch (error) {
+      console.error('加载切分片段失败:', error);
+    } finally {
+      setLoadingSegments(false);
+    }
+  };
+
+  // 打开文件所在文件夹
+  const openFileLocation = (filePath: string) => {
+    // 这里可以调用 Tauri 的 API 来打开文件夹
+    console.log('打开文件位置:', filePath);
+  };
+
+  return (
+    <div className="border border-gray-200 rounded-lg p-4 hover:shadow-md transition-shadow">
+      {/* 素材基本信息 */}
+      <div className="flex items-start justify-between mb-3">
+        <div className="flex items-center space-x-2 flex-1 min-w-0">
+          {getTypeIcon(material.material_type)}
+          <h4 className="font-medium text-gray-900 truncate">{material.name}</h4>
+        </div>
+        <span className={`px-2 py-1 text-xs rounded-full ${getStatusColor(material.processing_status)}`}>
+          {material.processing_status}
+        </span>
+      </div>
+
+      {/* 素材详细信息 */}
+      <div className="space-y-1 text-sm text-gray-600">
+        <p>类型: {material.material_type}</p>
+        <p>大小: {(material.file_size / 1024 / 1024).toFixed(2)} MB</p>
+        {material.segments && material.segments.length > 0 && (
+          <p>片段数: {material.segments.length}</p>
+        )}
+      </div>
+
+      {/* 切分片段控制 */}
+      {material.material_type === 'Video' && material.processing_status === 'Completed' && (
+        <div className="mt-3 pt-3 border-t border-gray-100">
+          <button
+            onClick={loadSegments}
+            disabled={loadingSegments}
+            className="flex items-center space-x-2 text-sm text-blue-600 hover:text-blue-800 disabled:opacity-50"
+          >
+            {loadingSegments ? (
+              <div className="w-4 h-4 border-2 border-blue-600 border-t-transparent rounded-full animate-spin" />
+            ) : showSegments ? (
+              <ChevronUp className="w-4 h-4" />
+            ) : (
+              <ChevronDown className="w-4 h-4" />
+            )}
+            <span>{loadingSegments ? '加载中...' : showSegments ? '隐藏片段' : '查看切分片段'}</span>
+          </button>
+
+          {/* 切分片段列表 */}
+          {showSegments && segments.length > 0 && (
+            <div className="mt-3 space-y-2">
+              <h5 className="text-sm font-medium text-gray-900">切分片段 ({segments.length})</h5>
+              <div className="space-y-1 max-h-40 overflow-y-auto">
+                {segments.map((segment) => (
+                  <div key={segment.id} className="flex items-center justify-between p-2 bg-gray-50 rounded text-xs">
+                    <div className="flex items-center space-x-2">
+                      <span className="font-medium">#{segment.segment_index + 1}</span>
+                      <Clock className="w-3 h-3" />
+                      <span>{formatTime(segment.start_time)} - {formatTime(segment.end_time)}</span>
+                      <span className="text-gray-500">({formatTime(segment.duration)})</span>
+                    </div>
+                    <button
+                      onClick={() => openFileLocation(segment.file_path)}
+                      className="text-blue-600 hover:text-blue-800"
+                      title="打开文件位置"
+                    >
+                      <ExternalLink className="w-3 h-3" />
+                    </button>
+                  </div>
+                ))}
+              </div>
+            </div>
+          )}
+
+          {showSegments && segments.length === 0 && (
+            <div className="mt-3 text-sm text-gray-500">
+              暂无切分片段
+            </div>
+          )}
+        </div>
+      )}
+    </div>
+  );
+};

apps/desktop/src/pages/ProjectDetails.tsx

@@ -1,14 +1,15 @@
 import React, { useEffect, useState } from 'react';
 import { useParams, useNavigate } from 'react-router-dom';
-import { ArrowLeft, FolderOpen, Calendar, Settings, Upload } from 'lucide-react';
+import { ArrowLeft, FolderOpen, Calendar, Settings, Upload, FileVideo, Clock, ExternalLink } from 'lucide-react';
 import { useProjectStore } from '../store/projectStore';
 import { useMaterialStore } from '../store/materialStore';
 import { Project } from '../types/project';
-import { MaterialImportResult } from '../types/material';
+import { MaterialImportResult, Material, MaterialSegment } from '../types/material';
 import { LoadingSpinner } from '../components/LoadingSpinner';
 import { ErrorMessage } from '../components/ErrorMessage';
 import { MaterialImportDialog } from '../components/MaterialImportDialog';
 import { FFmpegDebugPanel } from '../components/FFmpegDebugPanel';
+import { MaterialCard } from '../components/MaterialCard';
 
 /**
  * 项目详情页面组件
@@ -240,18 +241,7 @@ export const ProjectDetails: React.FC = () => {
                   ) : materials.length > 0 ? (
                     <div className="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-3 gap-4">
                       {materials.map((material) => (
-                        <div key={material.id} className="border border-gray-200 rounded-lg p-4">
-                          <h4 className="font-medium text-gray-900 truncate">{material.name}</h4>
-                          <p className="text-sm text-gray-600 mt-1">
-                            类型: {material.material_type}
-                          </p>
-                          <p className="text-sm text-gray-600">
-                            状态: {material.processing_status}
-                          </p>
-                          <p className="text-sm text-gray-600">
-                            大小: {(material.file_size / 1024 / 1024).toFixed(2)} MB
-                          </p>
-                        </div>
+                        <MaterialCard key={material.id} material={material} />
                       ))}
                     </div>
                   ) : (

apps/desktop/src/store/materialStore.ts

@@ -313,4 +313,15 @@ export const useMaterialStore = create<MaterialState>((set, get) => ({
       return `获取状态失败: ${error}`;
     }
   },
+
+  // 获取素材的切分片段
+  getMaterialSegments: async (materialId: string) => {
+    try {
+      const segments = await invoke<MaterialSegment[]>('get_material_segments', { materialId });
+      return segments;
+    } catch (error) {
+      console.error('获取素材片段失败:', error);
+      return [];
+    }
+  },
 }));