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。

electron/main/index.ts

@@ -32,10 +32,6 @@ import { logger } from '../utils/logger';
 import { warmupNetworkOptimization } from '../utils/uv-env';
 import { resolvePythonRuntime, resolveUvRuntime } from '../utils/python-runtime';
 import { initTelemetry } from '../utils/telemetry';
-import {
-  getOrCreateAgentGatewaySessionClientId,
-  rotateAgentGatewaySessionClientId,
-} from '../utils/store';
 
 import { isQuitting, setQuitting } from './app-state';
 import { applyProxySettings } from './proxy';
@@ -456,12 +452,7 @@ async function initialize(): Promise<void> {
   });
   const imageWorkspace = localImageWorkspaceEnabled
     ? new LocalImageWorkspace({ userDataDir: app.getPath('userData') })
-    : new WorksSquareDesignWorkspace({
-        eventSessionClientIdStore: {
-          getOrCreate: getOrCreateAgentGatewaySessionClientId,
-          rotate: rotateAgentGatewaySessionClientId,
-        },
-      });
+    : new WorksSquareDesignWorkspace();
   imageWorkspaceModule = imageWorkspace;
   if (consumeWorksSquareStartupRuntimeCleanupRequired()) {
     await clearManagedWorksSquareRuntimeBestEffort({