diff --git a/apps/desktop/main/ipc/chat.ts b/apps/desktop/main/ipc/chat.ts
index 544ff0a9..566a4cd3 100644
--- a/apps/desktop/main/ipc/chat.ts
+++ b/apps/desktop/main/ipc/chat.ts
@@ -234,6 +234,14 @@ export function registerChatHandlers(ctx: IpcContext): void {
     }
   })
 
+  /**
+   * 仅保留图表插件计算的 worker 卸载路径。
+   * 其他数据查询已迁移到 HTTP，但这些计算会处理大数组，放在 renderer 会冻结 UI。
+   */
+  ipcMain.handle('chat:pluginCompute', async (_, fnString: string, input: unknown) => {
+    return worker.pluginCompute(fnString, input)
+  })
+
   // Session index and summary IPC handlers have been removed.
   // All session-index operations now go through shared HTTP routes
   // (FetchSessionIndexAdapter via /_web/sessions/* endpoints).
diff --git a/apps/desktop/preload/apis/chat.ts b/apps/desktop/preload/apis/chat.ts
index bc051f4c..5f0d448b 100644
--- a/apps/desktop/preload/apis/chat.ts
+++ b/apps/desktop/preload/apis/chat.ts
@@ -78,6 +78,13 @@ export const chatApi = {
   ): Promise<{ success: boolean; newMessageCount: number; error?: string }> =>
     ipcRenderer.invoke('chat:incrementalImport', sessionId, filePath),
 
+  /**
+   * 图表插件计算会处理大量消息数组，Electron 下必须卸载到 worker，
+   * 避免 renderer 主线程同步执行造成窗口卡顿。
+   */
+  pluginCompute: <T = unknown>(fnString: string, input: unknown): Promise<T> =>
+    ipcRenderer.invoke('chat:pluginCompute', fnString, input),
+
   // ==================== Demo ====================
 
   importDemo: (
diff --git a/apps/desktop/preload/index.d.ts b/apps/desktop/preload/index.d.ts
index b15d7caf..f9bf551f 100644
--- a/apps/desktop/preload/index.d.ts
+++ b/apps/desktop/preload/index.d.ts
@@ -73,6 +73,7 @@ interface ChatApi {
     sessionId: string,
     filePath: string
   ) => Promise<{ success: boolean; newMessageCount: number; error?: string }>
+  pluginCompute: <T = unknown>(fnString: string, input: unknown) => Promise<T>
   importDemo: (locale: string) => Promise<{
     success: boolean
     groupSessionId?: string
diff --git a/src/services/data/electron.ts b/src/services/data/electron.ts
new file mode 100644
index 00000000..b83d7775
--- /dev/null
+++ b/src/services/data/electron.ts
@@ -0,0 +1,14 @@
+/**
+ * ElectronDataAdapter — Electron 专用 DataAdapter
+ *
+ * 普通数据查询继续复用共享 HTTP 路由；计算密集型 pluginCompute
+ * 通过 Electron worker 执行，避免在 renderer 主线程同步阻塞图表交互。
+ */
+
+import { FetchDataAdapter } from './fetch'
+
+export class ElectronDataAdapter extends FetchDataAdapter {
+  async pluginCompute<T = unknown>(fnString: string, input: unknown): Promise<T> {
+    return window.chatApi.pluginCompute<T>(fnString, input)
+  }
+}
diff --git a/src/services/registry.ts b/src/services/registry.ts
index b2757178..cbe0ff30 100644
--- a/src/services/registry.ts
+++ b/src/services/registry.ts
@@ -65,8 +65,8 @@ export async function initServices(): Promise<void> {
  * data/message/preferences/ai-streaming use Fetch/SSE; import stays on IPC.
  */
 async function initElectronAdapters(): Promise<void> {
-  const { FetchDataAdapter } = await import('./data/fetch')
-  registerAdapter('data', new FetchDataAdapter())
+  const { ElectronDataAdapter } = await import('./data/electron')
+  registerAdapter('data', new ElectronDataAdapter())
 
   const { ElectronImportAdapter } = await import('./import/electron')
   registerAdapter('import', new ElectronImportAdapter())