feat: 添加 SDD (规范驱动开发) 模块

src/types/electron.d.ts

@@ -45,6 +45,10 @@ export interface ElectronAPI {
   xcOpenCodeWebGetStatus: () => Promise<{ running: boolean; port: number }>
   xcOpenCodeWebGetPort: () => Promise<{ port: number }>
   xcOpenCodeWebCheckReady: () => Promise<{ ready: boolean }>
+  sddStart: () => Promise<{ success: boolean; error?: string }>
+  sddStop: () => Promise<{ success: boolean; error?: string }>
+  sddGetStatus: () => Promise<{ running: boolean; port: number }>
+  sddGetPort: () => Promise<{ port: number }>
 }
 
 declare global {