fix: 修复素材绑定页面显示暂无素材的问题

- 添加get_all_materials后端命令获取所有项目的素材
- 在MaterialRepository中实现get_all方法
- 在MaterialService中添加get_all_materials方法
- 修改MaterialModelBindingService的getMaterialsByFilter方法，在没有指定项目时获取所有素材而不是返回空数组
- 确保素材绑定页面能正确显示所有素材数据，与统计信息保持一致
- 支持在全局素材列表上应用绑定状态和搜索过滤

apps/desktop/src-tauri/src/business/services/material_service.rs

@@ -192,6 +192,20 @@ impl MaterialService {
         Ok(materials)
     }
 
+    /// 获取所有素材
+    pub fn get_all_materials(
+        repository: &MaterialRepository,
+    ) -> Result<Vec<Material>> {
+        let mut materials = repository.get_all()?;
+
+        // 为每个素材加载片段信息
+        for material in &mut materials {
+            material.segments = repository.get_segments(&material.id)?;
+        }
+
+        Ok(materials)
+    }
+
     /// 获取素材详情
     pub fn get_material_by_id(
         repository: &MaterialRepository,

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

@@ -108,6 +108,29 @@ impl MaterialRepository {
         Ok(materials)
     }
 
+    /// 获取所有素材
+    pub fn get_all(&self) -> Result<Vec<Material>> {
+        let conn = self.connection.lock().unwrap();
+
+        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
+             FROM materials ORDER BY created_at DESC"
+        )?;
+
+        let material_iter = stmt.query_map([], |row| {
+            self.row_to_material(row)
+        })?;
+
+        let mut materials = Vec::new();
+        for material in material_iter {
+            materials.push(material?);
+        }
+
+        Ok(materials)
+    }
+
     /// 根据MD5哈希检查素材是否存在
     pub fn exists_by_md5(&self, project_id: &str, md5_hash: &str) -> Result<bool> {
         let conn = self.connection.lock().unwrap();

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

@@ -51,6 +51,7 @@ pub fn run() {
             commands::material_commands::select_material_folders,
             commands::material_commands::scan_folder_materials,
             commands::material_commands::get_project_materials,
+            commands::material_commands::get_all_materials,
             commands::material_commands::get_material_by_id,
             commands::material_commands::delete_material,
             commands::material_commands::get_project_material_stats,

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

@@ -522,6 +522,21 @@ pub async fn get_project_materials(
         .map_err(|e| e.to_string())
 }
 
+/// 获取所有素材列表命令
+#[command]
+pub async fn get_all_materials(
+    state: State<'_, AppState>,
+) -> Result<Vec<Material>, 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")?;
+
+    MaterialService::get_all_materials(repository)
+        .map_err(|e| e.to_string())
+}
+
 /// 获取素材详情命令
 #[command]
 pub async fn get_material_by_id(

apps/desktop/src/services/materialModelBindingService.ts

@@ -154,6 +154,13 @@ export class MaterialModelBindingService {
     });
   }
 
+  /**
+   * 获取所有素材
+   */
+  static async getAllMaterials(): Promise<Material[]> {
+    return await invoke<Material[]>('get_all_materials');
+  }
+
   /**
    * 根据过滤条件获取素材
    */
@@ -178,8 +185,15 @@ export class MaterialModelBindingService {
         materials = materials.filter(m => m.model_id);
       }
     } else {
-      // 如果没有指定项目，返回空数组
-      return [];
+      // 如果没有指定项目，获取所有素材
+      materials = await this.getAllMaterials();
+
+      // 如果指定了绑定状态过滤
+      if (filter.bound === true) {
+        materials = materials.filter(m => m.model_id);
+      } else if (filter.bound === false) {
+        materials = materials.filter(m => !m.model_id);
+      }
     }
 
     // 应用搜索过滤