fix: 修复数据库查询NULL值错误和Tauri命令参数命名问题

- 修复video_classification_repository中get_classification_stats函数的NULL值处理
- 将SUM()查询结果从直接获取i32改为Option<i32>并提供默认值0
- 修复get_templates_by_project等命令的参数命名，使用camelCase以匹配前端调用
- 解决'Invalid column type Null at index: 1, name: pending'错误
- 解决'invalid args projectId for command get_templates_by_project'错误

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

@@ -511,11 +511,11 @@ impl VideoClassificationRepository {
         ))?;
 
         let task_stats = stmt.query_row([&pending_json, &uploading_json, &analyzing_json, &completed_json, &failed_json], |row| {
-            let total: i32 = row.get(0)?;
+            let total: i32 = row.get::<_, Option<i32>>(0)?.unwrap_or(0);
-            let pending: i32 = row.get(1)?;
+            let pending: i32 = row.get::<_, Option<i32>>(1)?.unwrap_or(0);
-            let processing: i32 = row.get(2)?;
+            let processing: i32 = row.get::<_, Option<i32>>(2)?.unwrap_or(0);
-            let completed: i32 = row.get(3)?;
+            let completed: i32 = row.get::<_, Option<i32>>(3)?.unwrap_or(0);
-            let failed: i32 = row.get(4)?;
+            let failed: i32 = row.get::<_, Option<i32>>(4)?.unwrap_or(0);
             Ok((total, pending, processing, completed, failed))
         })?;
 
@@ -530,7 +530,7 @@ impl VideoClassificationRepository {
 
         let record_stats = stmt.query_row([], |row| {
             Ok((
-                row.get::<_, i32>(0)?,
+                row.get::<_, Option<i32>>(0)?.unwrap_or(0),
                 row.get::<_, Option<f64>>(1)?.unwrap_or(0.0),
                 row.get::<_, Option<f64>>(2)?.unwrap_or(0.0),
             ))

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

@@ -96,12 +96,12 @@ pub async fn list_project_template_bindings(
 /// 获取项目的模板列表
 #[tauri::command]
 pub async fn get_templates_by_project(
-    project_id: String,
+    projectId: String,
     state: State<'_, AppState>,
 ) -> Result<Vec<ProjectTemplateBindingDetail>, String> {
     let service = create_service(&state)?;
 
-    service.get_templates_by_project(&project_id)
+    service.get_templates_by_project(&projectId)
         .await
         .map_err(|e| e.to_string())
 }
@@ -109,12 +109,12 @@ pub async fn get_templates_by_project(
 /// 获取模板的项目列表
 #[tauri::command]
 pub async fn get_projects_by_template(
-    template_id: String,
+    templateId: String,
     state: State<'_, AppState>,
 ) -> Result<Vec<ProjectTemplateBindingDetail>, String> {
     let service = create_service(&state)?;
 
-    service.get_projects_by_template(&template_id)
+    service.get_projects_by_template(&templateId)
         .await
         .map_err(|e| e.to_string())
 }
@@ -174,12 +174,12 @@ pub async fn deactivate_project_template_binding(
 /// 获取项目的主要模板绑定
 #[tauri::command]
 pub async fn get_primary_template_binding_for_project(
-    project_id: String,
+    projectId: String,
     state: State<'_, AppState>,
 ) -> Result<Option<ProjectTemplateBinding>, String> {
     let service = create_service(&state)?;
 
-    service.get_primary_binding_for_project(&project_id)
+    service.get_primary_binding_for_project(&projectId)
         .await
         .map_err(|e| e.to_string())
 }
@@ -187,13 +187,13 @@ pub async fn get_primary_template_binding_for_project(
 /// 设置项目的主要模板
 #[tauri::command]
 pub async fn set_primary_template_for_project(
-    project_id: String,
+    projectId: String,
-    template_id: String,
+    templateId: String,
     state: State<'_, AppState>,
 ) -> Result<ProjectTemplateBinding, String> {
     let service = create_service(&state)?;
 
-    service.set_primary_template(&project_id, &template_id)
+    service.set_primary_template(&projectId, &templateId)
         .await
         .map_err(|e| e.to_string())
 }

apps/desktop/src/services/projectTemplateBindingService.ts

@@ -95,7 +95,7 @@ export class ProjectTemplateBindingService {
    */
   static async getTemplatesByProject(projectId: string): Promise<ProjectTemplateBindingDetail[]> {
     try {
-      return await invoke('get_templates_by_project', { project_id: projectId });
+      return await invoke('get_templates_by_project', { projectId });
     } catch (error) {
       console.error('获取项目模板列表失败:', error);
       throw new Error(`获取项目模板列表失败: ${error}`);
@@ -107,7 +107,7 @@ export class ProjectTemplateBindingService {
    */
   static async getProjectsByTemplate(templateId: string): Promise<ProjectTemplateBindingDetail[]> {
     try {
-      return await invoke('get_projects_by_template', { template_id: templateId });
+      return await invoke('get_projects_by_template', { templateId });
     } catch (error) {
       console.error('获取模板项目列表失败:', error);
       throw new Error(`获取模板项目列表失败: ${error}`);