合并 AI 设计多会话客户端

整合 Enter 发送与多会话交互，保留服务端持久 Conversation Session，并补齐迁移、回归、Electron E2E 与 canonical 文档。

tests/e2e/fixtures/electron.ts

@@ -12,6 +12,7 @@ import { tmpdir } from 'node:os';
 import { basename, join, resolve } from 'node:path';
 
 export type LaunchElectronOptions = {
+  imageWorkspaceMode?: 'local';
   skipSetup?: boolean;
 };
 
@@ -79,6 +80,7 @@ function buildElectronEnvironment(
   resources: ElectronTestResources,
   skipSetup: boolean,
   hostApiPort: number,
+  imageWorkspaceMode?: 'local',
 ): Record<string, string> {
   const env: Record<string, string> = {};
   for (const key of PASSTHROUGH_ENVIRONMENT_KEYS) {
@@ -103,6 +105,9 @@ function buildElectronEnvironment(
   if (skipSetup) {
     env.NIANCODE_E2E_SKIP_SETUP = '1';
   }
+  if (imageWorkspaceMode) {
+    env.NIANCODE_IMAGE_WORKSPACE_MODE = imageWorkspaceMode;
+  }
   if (process.platform === 'linux') {
     env.ELECTRON_DISABLE_SANDBOX = '1';
   }
@@ -112,13 +117,19 @@ function buildElectronEnvironment(
 
 async function launchMakeloreElectron(
   resources: ElectronTestResources,
-  skipSetup: boolean,
+  options: LaunchElectronOptions,
 ): Promise<ElectronApplication> {
   const hostApiPort = await allocatePort();
+  const skipSetup = options.skipSetup ?? resources.defaultSkipSetup;
   const app = await electron.launch({
     executablePath: electronBinaryPath as unknown as string,
     args: [electronEntry],
-    env: buildElectronEnvironment(resources, skipSetup, hostApiPort),
+    env: buildElectronEnvironment(
+      resources,
+      skipSetup,
+      hostApiPort,
+      options.imageWorkspaceMode,
+    ),
     timeout: 90_000,
   });
 
@@ -248,8 +259,7 @@ export const test = base.extend<ElectronFixtures>({
 
   launchElectronApp: async ({ electronTestResources }, provideLauncher) => {
     await provideLauncher(async (options = {}) => {
-      const skipSetup = options.skipSetup ?? electronTestResources.defaultSkipSetup;
-      return await launchMakeloreElectron(electronTestResources, skipSetup);
+      return await launchMakeloreElectron(electronTestResources, options);
     });
   },