feat(v029): settings:* IPC (ai-enabled/onboarding-completed/get) + App.tsx 첫 launch 분기

src/main/services/SettingsService.ts

@@ -39,6 +39,14 @@ export class SettingsService {
     return this.cache;
   }
 
+  /**
+   * v0.2.9 Cut B Task 12 — settings:get IPC 핸들러용 read-only accessor.
+   * 첫 launch onboarding 분기에서 onboarding_completed 키 확인.
+   */
+  async getAll(): Promise<Settings> {
+    return this.load();
+  }
+
   async setOllama(value: OllamaSettings): Promise<void> {
     const validated = OllamaSettingsSchema.parse(value);
     const current = await this.load();