feat: 为MaterialCard添加缩略图功能并优化UI展示

- 为Material数据模型添加thumbnail_path字段
- 实现get_material_thumbnail_base64 API命令支持Material缩略图生成
- 创建MaterialThumbnail组件，支持懒加载和缓存机制
- 重新设计MaterialCard布局，使用缩略图替换文件类型图标
- 精简MaterialCard信息展示，将详细信息移到可折叠区域
- 优化按钮布局，使界面更加紧凑
- 简化切分片段显示方式，提升用户体验
- 修复数据库DateTime解析问题，支持SQLite和RFC3339两种格式
- 添加数据库迁移支持thumbnail_path字段
- 遵循promptx/tauri-desktop-app-expert开发规范

apps/desktop/src-tauri/src/data/models/material.rs

@@ -114,6 +114,7 @@ pub struct Material {
     pub metadata: MaterialMetadata,
     pub scene_detection: Option<SceneDetection>,
     pub segments: Vec<MaterialSegment>,
+    pub thumbnail_path: Option<String>, // 素材缩略图路径
     pub created_at: DateTime<Utc>,
     pub updated_at: DateTime<Utc>,
     pub processed_at: Option<DateTime<Utc>>,
@@ -236,6 +237,7 @@ impl Material {
             metadata: MaterialMetadata::None,
             scene_detection: None,
             segments: Vec::new(),
+            thumbnail_path: None,
             created_at: now,
             updated_at: now,
             processed_at: None,
@@ -267,6 +269,7 @@ impl Material {
             metadata: MaterialMetadata::None,
             scene_detection: None,
             segments: Vec::new(),
+            thumbnail_path: None,
             created_at: now,
             updated_at: now,
             processed_at: None,

apps/desktop/src-tauri/src/data/repositories/material_repository.rs

@@ -70,7 +70,7 @@ impl MaterialRepository {
         let mut stmt = conn.prepare(
             "SELECT id, project_id, model_id, name, original_path, file_size, md5_hash,
                     material_type, processing_status, metadata, scene_detection,
-                    created_at, updated_at, processed_at, error_message
+                    thumbnail_path, created_at, updated_at, processed_at, error_message
              FROM materials WHERE id = ?1"
         )?;
 
@@ -95,7 +95,7 @@ impl MaterialRepository {
         let mut stmt = conn.prepare(
             "SELECT id, project_id, model_id, name, original_path, file_size, md5_hash,
                     material_type, processing_status, metadata, scene_detection,
-                    created_at, updated_at, processed_at, error_message
+                    thumbnail_path, created_at, updated_at, processed_at, error_message
              FROM materials WHERE project_id = ?1 ORDER BY created_at DESC"
         )?;
 
@@ -122,7 +122,7 @@ impl MaterialRepository {
         let mut stmt = conn.prepare(
             "SELECT id, project_id, model_id, name, original_path, file_size, md5_hash,
                     material_type, processing_status, metadata, scene_detection,
-                    created_at, updated_at, processed_at, error_message
+                    thumbnail_path, created_at, updated_at, processed_at, error_message
              FROM materials ORDER BY created_at DESC"
         )?;
 
@@ -371,27 +371,53 @@ impl MaterialRepository {
             metadata,
             scene_detection,
             segments: Vec::new(), // 需要单独查询
-            created_at: chrono::DateTime::parse_from_rfc3339(&row.get::<_, String>("created_at")?)
-                .map_err(|e| rusqlite::Error::InvalidColumnType(
-                    row.as_ref().column_index("created_at").unwrap(),
-                    format!("DateTime parse error: {}", e),
-                    rusqlite::types::Type::Text
-                ))?.with_timezone(&chrono::Utc),
-            updated_at: chrono::DateTime::parse_from_rfc3339(&row.get::<_, String>("updated_at")?)
-                .map_err(|e| rusqlite::Error::InvalidColumnType(
-                    row.as_ref().column_index("updated_at").unwrap(),
-                    format!("DateTime parse error: {}", e),
-                    rusqlite::types::Type::Text
-                ))?.with_timezone(&chrono::Utc),
+            thumbnail_path: row.get("thumbnail_path")?,
+            created_at: {
+                let created_at_str = row.get::<_, String>("created_at")?;
+                // 尝试解析SQLite DATETIME格式 (YYYY-MM-DD HH:MM:SS)
+                if let Ok(dt) = chrono::NaiveDateTime::parse_from_str(&created_at_str, "%Y-%m-%d %H:%M:%S") {
+                    dt.and_utc()
+                } else {
+                    // 回退到RFC3339格式
+                    chrono::DateTime::parse_from_rfc3339(&created_at_str)
+                        .map_err(|e| rusqlite::Error::InvalidColumnType(
+                            row.as_ref().column_index("created_at").unwrap(),
+                            format!("DateTime parse error: {}", e),
+                            rusqlite::types::Type::Text
+                        ))?.with_timezone(&chrono::Utc)
+                }
+            },
+            updated_at: {
+                let updated_at_str = row.get::<_, String>("updated_at")?;
+                // 尝试解析SQLite DATETIME格式 (YYYY-MM-DD HH:MM:SS)
+                if let Ok(dt) = chrono::NaiveDateTime::parse_from_str(&updated_at_str, "%Y-%m-%d %H:%M:%S") {
+                    dt.and_utc()
+                } else {
+                    // 回退到RFC3339格式
+                    chrono::DateTime::parse_from_rfc3339(&updated_at_str)
+                        .map_err(|e| rusqlite::Error::InvalidColumnType(
+                            row.as_ref().column_index("updated_at").unwrap(),
+                            format!("DateTime parse error: {}", e),
+                            rusqlite::types::Type::Text
+                        ))?.with_timezone(&chrono::Utc)
+                }
+            },
             processed_at: row.get::<_, Option<String>>("processed_at")?
-                .map(|s| chrono::DateTime::parse_from_rfc3339(&s))
+                .map(|s| {
+                    // 尝试解析SQLite DATETIME格式 (YYYY-MM-DD HH:MM:SS)
+                    if let Ok(dt) = chrono::NaiveDateTime::parse_from_str(&s, "%Y-%m-%d %H:%M:%S") {
+                        Ok(dt.and_utc())
+                    } else {
+                        // 回退到RFC3339格式
+                        chrono::DateTime::parse_from_rfc3339(&s).map(|dt| dt.with_timezone(&chrono::Utc))
+                    }
+                })
                 .transpose()
                 .map_err(|e| rusqlite::Error::InvalidColumnType(
                     row.as_ref().column_index("processed_at").unwrap(),
                     format!("DateTime parse error: {}", e),
                     rusqlite::types::Type::Text
-                ))?
-                .map(|dt| dt.with_timezone(&chrono::Utc)),
+                ))?,
             error_message: row.get("error_message")?,
         })
     }
@@ -408,12 +434,21 @@ impl MaterialRepository {
             file_path: row.get("file_path")?,
             file_size: row.get::<_, i64>("file_size")? as u64,
             thumbnail_path: row.get("thumbnail_path")?,
-            created_at: chrono::DateTime::parse_from_rfc3339(&row.get::<_, String>("created_at")?)
-                .map_err(|e| rusqlite::Error::InvalidColumnType(
-                    row.as_ref().column_index("created_at").unwrap(),
-                    format!("DateTime parse error: {}", e),
-                    rusqlite::types::Type::Text
-                ))?.with_timezone(&chrono::Utc),
+            created_at: {
+                let created_at_str = row.get::<_, String>("created_at")?;
+                // 尝试解析SQLite DATETIME格式 (YYYY-MM-DD HH:MM:SS)
+                if let Ok(dt) = chrono::NaiveDateTime::parse_from_str(&created_at_str, "%Y-%m-%d %H:%M:%S") {
+                    dt.and_utc()
+                } else {
+                    // 回退到RFC3339格式
+                    chrono::DateTime::parse_from_rfc3339(&created_at_str)
+                        .map_err(|e| rusqlite::Error::InvalidColumnType(
+                            row.as_ref().column_index("created_at").unwrap(),
+                            format!("DateTime parse error: {}", e),
+                            rusqlite::types::Type::Text
+                        ))?.with_timezone(&chrono::Utc)
+                }
+            },
         })
     }
 
@@ -451,7 +486,7 @@ impl MaterialRepository {
         let mut stmt = conn.prepare(
             "SELECT id, project_id, model_id, name, original_path, file_size, md5_hash,
                     material_type, processing_status, metadata, scene_detection,
-                    created_at, updated_at, processed_at, error_message
+                    thumbnail_path, created_at, updated_at, processed_at, error_message
              FROM materials WHERE model_id = ?1 ORDER BY created_at DESC"
         )?;
 
@@ -476,7 +511,7 @@ impl MaterialRepository {
             (
                 "SELECT id, project_id, model_id, name, original_path, file_size, md5_hash,
                         material_type, processing_status, metadata, scene_detection,
-                        created_at, updated_at, processed_at, error_message
+                        thumbnail_path, created_at, updated_at, processed_at, error_message
                  FROM materials WHERE model_id IS NULL AND project_id = ?1 ORDER BY created_at DESC".to_string(),
                 vec![pid]
             )
@@ -484,7 +519,7 @@ impl MaterialRepository {
             (
                 "SELECT id, project_id, model_id, name, original_path, file_size, md5_hash,
                         material_type, processing_status, metadata, scene_detection,
-                        created_at, updated_at, processed_at, error_message
+                        thumbnail_path, created_at, updated_at, processed_at, error_message
                  FROM materials WHERE model_id IS NULL ORDER BY created_at DESC".to_string(),
                 vec![]
             )
@@ -595,7 +630,18 @@ impl MaterialRepository {
                 file_path: row.get(6)?,
                 file_size: row.get(7)?,
                 thumbnail_path: row.get(8)?,
-                created_at: chrono::DateTime::parse_from_rfc3339(&row.get::<_, String>(9)?).map_err(|_| rusqlite::Error::InvalidColumnType(9, "created_at".to_string(), rusqlite::types::Type::Text))?.with_timezone(&chrono::Utc),
+                created_at: {
+                    let created_at_str = row.get::<_, String>(9)?;
+                    // 尝试解析SQLite DATETIME格式 (YYYY-MM-DD HH:MM:SS)
+                    if let Ok(dt) = chrono::NaiveDateTime::parse_from_str(&created_at_str, "%Y-%m-%d %H:%M:%S") {
+                        dt.and_utc()
+                    } else {
+                        // 回退到RFC3339格式
+                        chrono::DateTime::parse_from_rfc3339(&created_at_str)
+                            .map_err(|_| rusqlite::Error::InvalidColumnType(9, "created_at".to_string(), rusqlite::types::Type::Text))?
+                            .with_timezone(&chrono::Utc)
+                    }
+                },
             })
         })?;
 
@@ -627,7 +673,18 @@ impl MaterialRepository {
                 file_path: row.get(6)?,
                 file_size: row.get(7)?,
                 thumbnail_path: row.get(8)?,
-                created_at: chrono::DateTime::parse_from_rfc3339(&row.get::<_, String>(9)?).map_err(|_| rusqlite::Error::InvalidColumnType(9, "created_at".to_string(), rusqlite::types::Type::Text))?.with_timezone(&chrono::Utc),
+                created_at: {
+                    let created_at_str = row.get::<_, String>(9)?;
+                    // 尝试解析SQLite DATETIME格式 (YYYY-MM-DD HH:MM:SS)
+                    if let Ok(dt) = chrono::NaiveDateTime::parse_from_str(&created_at_str, "%Y-%m-%d %H:%M:%S") {
+                        dt.and_utc()
+                    } else {
+                        // 回退到RFC3339格式
+                        chrono::DateTime::parse_from_rfc3339(&created_at_str)
+                            .map_err(|_| rusqlite::Error::InvalidColumnType(9, "created_at".to_string(), rusqlite::types::Type::Text))?
+                            .with_timezone(&chrono::Utc)
+                    }
+                },
             })
         })?;
 
@@ -773,6 +830,19 @@ impl MaterialRepository {
 
         Ok(count as u32)
     }
+
+    /// 更新素材的缩略图路径
+    pub fn update_material_thumbnail(&self, material_id: &str, thumbnail_path: &str) -> Result<()> {
+        let conn = self.database.get_connection();
+        let conn = conn.lock().unwrap();
+
+        conn.execute(
+            "UPDATE materials SET thumbnail_path = ?, updated_at = CURRENT_TIMESTAMP WHERE id = ?",
+            [thumbnail_path, material_id],
+        )?;
+
+        Ok(())
+    }
 }
 
 /// 模特素材统计信息

apps/desktop/src-tauri/src/infrastructure/database.rs

@@ -1236,6 +1236,17 @@ impl Database {
             println!("Added thumbnail_path column to material_segments table");
         }
 
+        // 添加缩略图路径字段到素材表
+        let has_material_thumbnail_path_column = conn.prepare("SELECT thumbnail_path FROM materials LIMIT 1").is_ok();
+        if !has_material_thumbnail_path_column {
+            println!("Adding thumbnail_path column to materials table");
+            conn.execute(
+                "ALTER TABLE materials ADD COLUMN thumbnail_path TEXT",
+                [],
+            )?;
+            println!("Added thumbnail_path column to materials table");
+        }
+
         // 暂时禁用自动清理，避免启动时卡住
         // self.cleanup_invalid_projects()?;
 

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

@@ -75,6 +75,7 @@ pub fn run() {
             commands::material_commands::generate_video_thumbnail,
             commands::material_commands::generate_and_save_segment_thumbnail,
             commands::material_commands::read_thumbnail_as_data_url,
+            commands::material_commands::get_material_thumbnail_base64,
             commands::material_commands::get_segment_thumbnail_base64,
             commands::material_commands::test_scene_detection,
             commands::material_commands::get_material_segments,

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

@@ -156,3 +156,5 @@ pub fn debug_database_data(state: State<AppState>, project_id: String) -> Result
 
     Ok(result)
 }
+
+

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

@@ -904,6 +904,177 @@ pub async fn read_thumbnail_as_data_url(file_path: String) -> Result<String, Str
     Ok(format!("data:image/jpeg;base64,{}", base64_data))
 }
 
+/// 根据materialId获取缩略图base64数据URL
+#[command]
+pub async fn get_material_thumbnail_base64(
+    material_id: String,
+    app_state: State<'_, AppState>,
+) -> Result<String, String> {
+    use crate::infrastructure::ffmpeg::FFmpegService;
+    use std::path::Path;
+    use std::fs;
+    use base64::{Engine as _, engine::general_purpose};
+
+    // 获取素材信息
+    let material = {
+        let material_repository_guard = app_state.material_repository.lock().unwrap();
+        let material_repository = material_repository_guard.as_ref()
+            .ok_or("MaterialRepository未初始化")?;
+
+        material_repository.get_by_id(&material_id)
+            .map_err(|e| e.to_string())?
+    };
+
+    let material = match material {
+        Some(m) => m,
+        None => return Err("素材不存在".to_string()),
+    };
+
+    // 检查数据库中是否已有缩略图路径
+    if let Some(ref thumbnail_path) = material.thumbnail_path {
+        // 去掉Windows长路径前缀
+        let clean_path = if thumbnail_path.starts_with("\\\\?\\") {
+            &thumbnail_path[4..]
+        } else {
+            thumbnail_path
+        };
+
+        // 检查文件是否存在
+        if Path::new(clean_path).exists() {
+            // 文件存在，直接读取并返回
+            let file_data = fs::read(clean_path)
+                .map_err(|e| format!("读取缩略图文件失败: {}", e))?;
+
+            let base64_data = general_purpose::STANDARD.encode(&file_data);
+            return Ok(format!("data:image/jpeg;base64,{}", base64_data));
+        }
+    }
+
+    // 缩略图不存在或文件已丢失，需要重新生成
+    let video_path = &material.original_path;
+
+    // 去掉Windows长路径前缀
+    let clean_video_path = if video_path.starts_with("\\\\?\\") {
+        &video_path[4..]
+    } else {
+        video_path
+    };
+
+    // 检查视频文件是否存在，不存在则报错
+    if !Path::new(clean_video_path).exists() {
+        let error_msg = format!("视频文件不存在，无法生成缩略图: {}", clean_video_path);
+        tracing::error!(
+            material_id = %material_id,
+            video_path = %clean_video_path,
+            "视频文件不存在"
+        );
+        return Err(error_msg);
+    }
+
+    // 生成缩略图路径
+    let thumbnail_filename = format!("{}_material_thumbnail.jpg", material.id);
+    let video_dir = Path::new(clean_video_path).parent()
+        .ok_or("无法获取视频文件目录")?;
+    let thumbnail_path = video_dir.join(thumbnail_filename);
+    let thumbnail_path_str = thumbnail_path.to_string_lossy().to_string();
+
+    // 获取视频信息来确定合适的缩略图尺寸
+    let video_info = FFmpegService::get_video_info(clean_video_path)
+        .map_err(|e| e.to_string())?;
+
+    // 计算缩略图尺寸，保持宽高比，最大宽度160
+    let max_width = 160;
+    let (thumb_width, thumb_height) = if video_info.width > 0 && video_info.height > 0 {
+        let aspect_ratio = video_info.width as f64 / video_info.height as f64;
+        if video_info.width > max_width {
+            let new_width = max_width;
+            let new_height = (new_width as f64 / aspect_ratio).round() as u32;
+            (new_width, new_height)
+        } else {
+            (video_info.width, video_info.height)
+        }
+    } else {
+        // 如果无法获取视频尺寸，使用默认值
+        (160, 120)
+    };
+
+    // 生成缩略图（使用首帧，带重试机制）
+    let timestamp = 0.0; // 使用视频开始时间
+
+    // 先进行预检查
+    if let Err(e) = FFmpegService::validate_thumbnail_generation(
+        clean_video_path,
+        &thumbnail_path_str,
+        timestamp
+    ) {
+        let error_msg = format!(
+            "缩略图生成预检查失败: {} (视频: {})",
+            e, clean_video_path
+        );
+        tracing::error!(
+            material_id = %material_id,
+            video_path = %clean_video_path,
+            error = %e,
+            "缩略图生成预检查失败"
+        );
+        return Err(error_msg);
+    }
+
+    // 使用带重试机制的缩略图生成
+    if let Err(e) = FFmpegService::generate_thumbnail_with_retry(
+        clean_video_path,
+        &thumbnail_path_str,
+        timestamp,
+        thumb_width,
+        thumb_height
+    ) {
+        let error_msg = format!(
+            "FFmpeg生成缩略图失败（已重试）: {} (视频: {}, 输出: {}, 时间戳: {}s)",
+            e, clean_video_path, thumbnail_path_str, timestamp
+        );
+        tracing::error!(
+            material_id = %material_id,
+            video_path = %clean_video_path,
+            thumbnail_path = %thumbnail_path_str,
+            timestamp = timestamp,
+            error = %e,
+            "FFmpeg缩略图生成失败（已重试）"
+        );
+        return Err(error_msg);
+    }
+
+    // 验证缩略图文件是否生成成功
+    if !Path::new(&thumbnail_path_str).exists() {
+        let error_msg = format!(
+            "缩略图文件生成失败，文件不存在: {}",
+            thumbnail_path_str
+        );
+        tracing::error!(
+            material_id = %material_id,
+            thumbnail_path = %thumbnail_path_str,
+            "缩略图文件生成失败"
+        );
+        return Err(error_msg);
+    }
+
+    // 保存缩略图路径到数据库
+    {
+        let material_repository_guard = app_state.material_repository.lock().unwrap();
+        let material_repository = material_repository_guard.as_ref()
+            .ok_or("MaterialRepository未初始化")?;
+
+        material_repository.update_material_thumbnail(&material_id, &thumbnail_path_str)
+            .map_err(|e| e.to_string())?;
+    }
+
+    // 读取生成的缩略图文件并返回base64
+    let file_data = fs::read(&thumbnail_path_str)
+        .map_err(|e| format!("读取生成的缩略图失败: {}", e))?;
+
+    let base64_data = general_purpose::STANDARD.encode(&file_data);
+    Ok(format!("data:image/jpeg;base64,{}", base64_data))
+}
+
 /// 根据segmentId获取缩略图base64数据URL
 #[command]
 pub async fn get_segment_thumbnail_base64(

apps/desktop/src/components/MaterialCard.tsx

@@ -1,6 +1,6 @@
 import React, { useState, useEffect } from 'react';
 import {
-  FileVideo, FileAudio, FileImage, File, Clock, ExternalLink, ChevronDown, ChevronUp,
+  FileVideo, FileAudio, FileImage, Clock, ExternalLink, ChevronDown, ChevronUp,
   Monitor, Volume2, Palette, Calendar, Hash, Zap, HardDrive, Film, Eye, Brain, Loader2, User, Edit2, Trash2, RefreshCw
 } from 'lucide-react';
 import { Material, MaterialSegment } from '../types/material';
@@ -9,6 +9,7 @@ import { useVideoClassificationStore } from '../store/videoClassificationStore';
 import { Model } from '../types/model';
 import { invoke } from '@tauri-apps/api/core';
 import { DeleteConfirmDialog } from './DeleteConfirmDialog';
+import { MaterialThumbnail } from './MaterialThumbnail';
 
 interface MaterialCardProps {
   material: Material;
@@ -73,22 +74,12 @@ export const MaterialCard: React.FC<MaterialCardProps> = ({ material, onEdit, on
   const [associatedModel, setAssociatedModel] = useState<Model | null>(null);
   const [loadingModel, setLoadingModel] = useState(false);
   const [showDeleteConfirm, setShowDeleteConfirm] = useState(false);
+  const [thumbnailCache, setThumbnailCache] = useState<Map<string, string>>(new Map());
+  const [showDetails, setShowDetails] = useState(false);
   const [isDeleting, setIsDeleting] = useState(false);
   const [isReprocessing, setIsReprocessing] = 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) => {
@@ -272,72 +263,124 @@ export const MaterialCard: React.FC<MaterialCardProps> = ({ material, onEdit, on
   };
 
   return (
-    <div className="border border-gray-200 rounded-lg p-4 hover:shadow-md transition-shadow">
+    <div className="border border-gray-200 rounded-lg p-3 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>
-        <div className="flex items-center space-x-2">
-          {/* 重新处理按钮 - 仅在状态为 Pending 时显示 */}
-          {material.processing_status === 'Pending' && onReprocess && (
-            <button
-              onClick={handleReprocessClick}
-              disabled={isReprocessing}
-              className="text-gray-400 hover:text-green-500 transition-colors disabled:opacity-50"
-              title="重新处理"
-            >
-              {isReprocessing ? (
-                <Loader2 className="w-4 h-4 animate-spin" />
-              ) : (
-                <RefreshCw className="w-4 h-4" />
+      <div className="flex items-start gap-3 mb-3">
+        {/* 缩略图 */}
+        <MaterialThumbnail
+          material={material}
+          size="medium"
+          thumbnailCache={thumbnailCache}
+          setThumbnailCache={setThumbnailCache}
+        />
+
+        {/* 素材信息 */}
+        <div className="flex-1 min-w-0">
+          <div className="flex items-start justify-between">
+            <div className="flex-1 min-w-0">
+              <h4 className="font-medium text-gray-900 truncate text-sm">{material.name}</h4>
+              <div className="flex items-center gap-3 mt-1 text-xs text-gray-500">
+                <span className="flex items-center gap-1">
+                  <HardDrive className="w-3 h-3" />
+                  {formatFileSize(material.file_size)}
+                </span>
+                <span className="flex items-center gap-1">
+                  <Calendar className="w-3 h-3" />
+                  {formatDate(material.created_at)}
+                </span>
+              </div>
+            </div>
+
+            {/* 操作按钮 */}
+            <div className="flex items-center space-x-1 ml-2">
+              {/* 重新处理按钮 - 仅在状态为 Pending 时显示 */}
+              {material.processing_status === 'Pending' && onReprocess && (
+                <button
+                  onClick={handleReprocessClick}
+                  disabled={isReprocessing}
+                  className="text-gray-400 hover:text-green-500 transition-colors disabled:opacity-50 p-1"
+                  title="重新处理"
+                >
+                  {isReprocessing ? (
+                    <Loader2 className="w-3 h-3 animate-spin" />
+                  ) : (
+                    <RefreshCw className="w-3 h-3" />
+                  )}
+                </button>
               )}
-            </button>
-          )}
 
-          {onEdit && (
-            <button
-              onClick={() => onEdit(material)}
-              className="text-gray-400 hover:text-blue-500 transition-colors"
-              title="编辑素材"
-            >
-              <Edit2 className="w-4 h-4" />
-            </button>
-          )}
+              {onEdit && (
+                <button
+                  onClick={() => onEdit(material)}
+                  className="text-gray-400 hover:text-blue-500 transition-colors p-1"
+                  title="编辑素材"
+                >
+                  <Edit2 className="w-3 h-3" />
+                </button>
+              )}
 
-          {onDelete && (
-            <button
-              onClick={handleDeleteClick}
-              className="text-gray-400 hover:text-red-500 transition-colors"
-              title="删除素材"
-            >
-              <Trash2 className="w-4 h-4" />
-            </button>
-          )}
+              {onDelete && (
+                <button
+                  onClick={handleDeleteClick}
+                  className="text-gray-400 hover:text-red-500 transition-colors p-1"
+                  title="删除素材"
+                >
+                  <Trash2 className="w-3 h-3" />
+                </button>
+              )}
 
-          <span className={`px-2 py-1 text-xs rounded-full ${getStatusColor(material.processing_status)}`}>
-            {material.processing_status}
-          </span>
+              <span className={`px-2 py-1 text-xs rounded-full ${getStatusColor(material.processing_status)}`}>
+                {material.processing_status}
+              </span>
+            </div>
+          </div>
         </div>
       </div>
 
-      {/* 素材详细信息 */}
-      <div className="space-y-3">
-        {/* 基本信息 */}
-        <div className="grid grid-cols-2 gap-2 text-sm">
-          <div className="flex items-center space-x-1 text-gray-600">
-            <HardDrive className="w-3 h-3" />
-            <span>{formatFileSize(material.file_size)}</span>
-          </div>
-          <div className="flex items-center space-x-1 text-gray-600">
-            <Calendar className="w-3 h-3" />
-            <span>{formatDate(material.created_at)}</span>
-          </div>
+      {/* 快速操作区域 */}
+      <div className="flex items-center justify-between pt-2">
+        <div className="flex items-center space-x-2">
+          {/* AI分类按钮 */}
+          {material.material_type === 'Video' && material.processing_status === 'Completed' && (
+            <button
+              onClick={handleStartClassification}
+              disabled={isClassifying || classificationLoading}
+              className="text-xs px-2 py-1 bg-blue-50 text-blue-600 rounded hover:bg-blue-100 disabled:opacity-50 flex items-center gap-1"
+            >
+              {isClassifying ? (
+                <Loader2 className="w-3 h-3 animate-spin" />
+              ) : (
+                <Brain className="w-3 h-3" />
+              )}
+              AI分类
+            </button>
+          )}
         </div>
 
-        {/* 关联模特信息 */}
-        {material.model_id && (
+        {/* 展开/折叠详细信息按钮 */}
+        <button
+          onClick={() => setShowDetails(!showDetails)}
+          className="text-gray-400 hover:text-gray-600 transition-colors text-xs flex items-center gap-1"
+        >
+          {showDetails ? (
+            <>
+              <span>收起</span>
+              <ChevronUp className="w-3 h-3" />
+            </>
+          ) : (
+            <>
+              <span>详情</span>
+              <ChevronDown className="w-3 h-3" />
+            </>
+          )}
+        </button>
+      </div>
+
+      {/* 素材详细信息 - 可折叠 */}
+      {showDetails && (
+        <div className="space-y-3 pt-3 border-t border-gray-100">
+          {/* 关联模特信息 */}
+          {material.model_id && (
           <div className="bg-purple-50 rounded-lg p-3">
             <div className="flex items-center space-x-2">
               <User className="w-4 h-4 text-purple-600" />
@@ -490,7 +533,8 @@ export const MaterialCard: React.FC<MaterialCardProps> = ({ material, onEdit, on
             </div>
           </div>
         )}
-      </div>
+        </div>
+      )}
 
       {/* 切分片段控制 */}
       {material.material_type === 'Video' && material.processing_status === 'Completed' && (
@@ -511,34 +555,21 @@ export const MaterialCard: React.FC<MaterialCardProps> = ({ material, onEdit, on
               <span>{loadingSegments ? '加载中...' : showSegments ? '隐藏片段' : '查看切分片段'}</span>
             </button>
 
-            {/* AI智能分类按钮 */}
-            <button
-              onClick={handleStartClassification}
-              disabled={isClassifying || classificationLoading}
-              className="flex items-center space-x-1 px-3 py-1.5 text-xs font-medium text-white bg-gradient-to-r from-purple-500 to-pink-500 rounded-md hover:from-purple-600 hover:to-pink-600 disabled:opacity-50 disabled:cursor-not-allowed transition-all duration-200 shadow-sm hover:shadow-md"
-              title="使用AI自动分类视频片段"
-            >
-              {isClassifying ? (
-                <Loader2 className="w-3 h-3 animate-spin" />
-              ) : (
-                <Brain className="w-3 h-3" />
-              )}
-              <span>{isClassifying ? '分类中...' : 'AI分类'}</span>
-            </button>
+
           </div>
 
           {/* 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">
+            <div className="mt-3">
+              <div className="text-xs text-gray-500 mb-2">
+                共 {segments.length} 个片段，总时长 {formatTime(segments.reduce((total, seg) => total + seg.duration, 0))}
+              </div>
+              <div className="grid grid-cols-2 gap-1 max-h-32 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">
+                  <div key={segment.id} className="flex items-center justify-between p-1.5 bg-gray-50 rounded text-xs">
+                    <div className="flex items-center space-x-1">
                       <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>
+                      <span className="text-gray-500">{formatTime(segment.duration)}</span>
                     </div>
                     <button
                       onClick={() => openFileLocation(segment.file_path)}

apps/desktop/src/components/MaterialThumbnail.tsx

@@ -0,0 +1,135 @@
+import React, { useState, useEffect } from 'react';
+import { FileVideo, FileAudio, FileImage, File, Loader2 } from 'lucide-react';
+import { Material } from '../types/material';
+import { invoke } from '@tauri-apps/api/core';
+import { useLazyLoad } from '../hooks/useLazyLoad';
+
+interface MaterialThumbnailProps {
+  material: Material;
+  size?: 'small' | 'medium' | 'large';
+  className?: string;
+  thumbnailCache?: Map<string, string>;
+  setThumbnailCache?: (cache: Map<string, string>) => void;
+}
+
+/**
+ * Material缩略图组件
+ * 遵循Tauri开发规范的组件设计模式
+ * 支持懒加载、缓存机制、错误处理
+ */
+export const MaterialThumbnail: React.FC<MaterialThumbnailProps> = ({
+  material,
+  size = 'medium',
+  className = '',
+  thumbnailCache = new Map(),
+  setThumbnailCache = () => {},
+}) => {
+  const [loading, setLoading] = useState(false);
+  const [thumbnailUrl, setThumbnailUrl] = useState<string | null>(null);
+  const [error, setError] = useState(false);
+
+  // 使用懒加载Hook，当缩略图容器可见时才开始加载
+  const { isVisible, elementRef } = useLazyLoad(0.1, '100px');
+
+  // 根据size确定尺寸
+  const getSizeClasses = () => {
+    switch (size) {
+      case 'small':
+        return 'w-12 h-12';
+      case 'medium':
+        return 'w-16 h-16';
+      case 'large':
+        return 'w-24 h-24';
+      default:
+        return 'w-16 h-16';
+    }
+  };
+
+  // 获取文件类型图标
+  const getTypeIcon = () => {
+    const iconSize = size === 'small' ? 'w-6 h-6' : size === 'large' ? 'w-12 h-12' : 'w-8 h-8';
+    
+    switch (material.material_type) {
+      case 'Video':
+        return <FileVideo className={`${iconSize} text-blue-500`} />;
+      case 'Audio':
+        return <FileAudio className={`${iconSize} text-green-500`} />;
+      case 'Image':
+        return <FileImage className={`${iconSize} text-purple-500`} />;
+      default:
+        return <File className={`${iconSize} text-gray-500`} />;
+    }
+  };
+
+  useEffect(() => {
+    // 只有当元素可见时才加载缩略图
+    if (!isVisible) return;
+
+    // 只为视频类型生成缩略图
+    if (material.material_type !== 'Video') return;
+
+    const loadThumbnail = async () => {
+      const materialId = material.id;
+
+      // 检查缓存
+      if (thumbnailCache.has(materialId)) {
+        const cachedUrl = thumbnailCache.get(materialId);
+        setThumbnailUrl(cachedUrl || null);
+        return;
+      }
+
+      // 加载缩略图
+      setLoading(true);
+      setError(false);
+      
+      try {
+        console.log('获取素材缩略图:', materialId);
+        const dataUrl = await invoke<string>('get_material_thumbnail_base64', {
+          materialId: materialId
+        });
+        console.log('获取缩略图成功');
+        setThumbnailUrl(dataUrl);
+
+        // 更新缓存
+        const newCache = new Map(thumbnailCache);
+        newCache.set(materialId, dataUrl);
+        setThumbnailCache(newCache);
+      } catch (error) {
+        console.error('获取缩略图失败:', error);
+        setError(true);
+      } finally {
+        setLoading(false);
+      }
+    };
+
+    loadThumbnail();
+  }, [isVisible, material.id, material.material_type, thumbnailCache, setThumbnailCache]);
+
+  return (
+    <div
+      ref={elementRef}
+      className={`${getSizeClasses()} bg-gray-100 rounded-lg flex items-center justify-center flex-shrink-0 overflow-hidden ${className}`}
+    >
+      {loading ? (
+        <Loader2 className={`${size === 'small' ? 'w-3 h-3' : size === 'large' ? 'w-6 h-6' : 'w-4 h-4'} animate-spin text-blue-600`} />
+      ) : thumbnailUrl && !error ? (
+        <img
+          src={thumbnailUrl}
+          alt={`${material.name} 缩略图`}
+          className="w-full h-full object-cover rounded-lg"
+          onError={() => {
+            setError(true);
+            setThumbnailUrl(null);
+          }}
+        />
+      ) : isVisible ? (
+        getTypeIcon()
+      ) : (
+        // 未加载时显示占位符
+        <div className={`${size === 'small' ? 'w-6 h-6' : size === 'large' ? 'w-12 h-12' : 'w-8 h-8'} bg-gray-200 rounded flex items-center justify-center`}>
+          <div className={`${size === 'small' ? 'w-3 h-3' : size === 'large' ? 'w-6 h-6' : 'w-4 h-4'} bg-gray-300 rounded`}></div>
+        </div>
+      )}
+    </div>
+  );
+};

apps/desktop/src/components/ProjectList.tsx

@@ -8,6 +8,7 @@ import { EmptyState } from './EmptyState';
 import { LoadingSpinner } from './LoadingSpinner';
 import { ErrorMessage } from './ErrorMessage';
 import { DeleteConfirmDialog } from './DeleteConfirmDialog';
+
 import { PageLoadingSkeleton } from './SkeletonLoader';
 import { InteractiveButton } from './InteractiveButton';
 import { Plus, Trash2 } from 'lucide-react';

apps/desktop/src/types/material.ts

@@ -86,6 +86,7 @@ export interface Material {
   scene_detection?: SceneDetection;
   segments: MaterialSegment[];
   model_id?: string; // 关联的模特ID
+  thumbnail_path?: string; // 素材缩略图路径
   created_at: string;
   updated_at: string;
   processed_at?: string;