merge: 集成共享 Agent Browser 调试能力

需求：将 Agent Browser 独立功能提交合并到包含 AI 设计 Workspace 的最新主线。

实现：保留双方模块初始化、Host API 路由和 README 产品说明。

# Conflicts:
#	electron/api/context.ts

electron/api/context.ts

@@ -4,14 +4,66 @@ import type { OpencodeProjectStore } from '../opencode/project-store';
 import type { HostEventBus } from './event-bus';
 import type { createWorksCloudDeployment } from '../services/works-cloud-deployment';
 import type { DesignWorkspaceModule } from '../image-workspace/module';
+import type {
+  AgentBrowserBounds,
+  AgentBrowserCdpEventPage,
+  AgentBrowserCdpResult,
+  AgentBrowserPayloadChunk,
+  AgentBrowserSnapshot,
+} from '../../shared/agent-browser';
 
 export type WorksCloudDeploymentCoordinator = ReturnType<typeof createWorksCloudDeployment>;
 
+export interface AgentBrowserService {
+  getSnapshot(projectPath?: string): Promise<AgentBrowserSnapshot> | AgentBrowserSnapshot;
+  open(input: {
+    projectId: string;
+    projectPath: string;
+    url: string;
+    bounds?: AgentBrowserBounds;
+    visible?: boolean;
+  }): Promise<AgentBrowserSnapshot>;
+  present(input: {
+    projectPath: string;
+    visible: boolean;
+    bounds?: AgentBrowserBounds;
+  }): Promise<AgentBrowserSnapshot>;
+  navigate(input: {
+    projectPath: string;
+    action: 'url' | 'back' | 'forward' | 'reload';
+    url?: string;
+  }): Promise<AgentBrowserSnapshot>;
+  sendCdp(input: {
+    projectPath: string;
+    method: string;
+    params?: Record<string, unknown>;
+    sessionRef?: string;
+    timeoutMs?: number;
+  }): Promise<AgentBrowserCdpResult>;
+  readEvents(input: {
+    projectPath: string;
+    after?: number;
+    methods?: string[];
+    limit?: number;
+    waitMs?: number;
+  }): Promise<AgentBrowserCdpEventPage>;
+  readPayload(input: {
+    projectPath: string;
+    handle: string;
+    offset?: number;
+    maxBytes?: number;
+  }): Promise<AgentBrowserPayloadChunk>;
+  close(projectPath?: string): Promise<AgentBrowserSnapshot>;
+  resetProfile(projectPath: string): Promise<AgentBrowserSnapshot>;
+  dispose(): Promise<void>;
+}
+
 export interface HostApiContext {
   opencodeManager: OpencodeManager;
   opencodeProjectStore: OpencodeProjectStore;
   eventBus: HostEventBus;
   mainWindow: BrowserWindow | null;
+  agentBrowser?: AgentBrowserService;
   worksCloudDeployment?: WorksCloudDeploymentCoordinator;
   imageWorkspace?: DesignWorkspaceModule;
 }