Fix: Optimized variable node display and Agent template multi-language support #3221 (#9787)

### What problem does this PR solve?

Fix: Optimized variable node display and Agent template multi-language
support #3221

- Modified the VariableNode component to add parent label and icon
properties
- Updated the VariablePickerMenuPlugin to support displaying parent
labels and icons
- Adjusted useBuildNodeOutputOptions and useBuildBeginVariableOptions to
pass new properties
- Optimized the Agent TemplateCard component to switch the title and
description based on the language

### Type of change

- [x] Bug Fix (non-breaking change which fixes an issue)

web/src/interfaces/database/flow.ts

@@ -48,10 +48,16 @@ export interface IFlowTemplate {
   canvas_type: string;
   create_date: string;
   create_time: number;
-  description: string;
+  description: {
+    en: string;
+    zh: string;
+  };
   dsl: DSL;
   id: string;
-  title: string;
+  title: {
+    en: string;
+    zh: string;
+  };
   update_date: string;
   update_time: number;
 }