Uiviewer: 截图和组件树的可视化关联

[growvv]

[Copilot]

Pull Request Overview

This PR adds a UI Viewer web interface to HapTest, enabling real-time inspection of HarmonyOS UI hierarchies through a browser-based dashboard. The feature includes backend API endpoints, Express server setup, device pooling for connection management, and a frontend interface with Vue.js.

• Adds Express-based web server with REST API for device connectivity, screenshot fetching, and hierarchy inspection
• Implements device pooling to manage persistent connections and automatic cleanup
• Extends CLI with ui-viewer subcommand to launch the web service
• Provides frontend UI with interactive hierarchy tree and screenshot overlay

Reviewed Changes

Copilot reviewed 20 out of 21 changed files in this pull request and generated 6 comments.

Show a summary per file

File	Description
src/ui/ui_viewer_server.ts	Core server implementation with Express routes, device pooling, and session management
src/ui/hierarchy_builder.ts	Converts component trees to hierarchical JSON and generates XPath expressions
src/model/builder/page_builder.ts	Enhanced layout parsing to support multiple input formats (windows, pages, direct nodes)
src/device/device.ts	Adds disconnect/teardown methods and fallback page creation
src/device/hdc.ts	Adds listTargets() static method to enumerate connected devices
src/device/uidriver/*.ts	Returns DriverContext instead of bare driver; adds cleanup methods
src/cli/cli.ts	Adds ui-viewer subcommand with refactored command structure
test/unit/*.test.ts	Comprehensive unit tests for server routes and page builder normalization
res/ui-viewer/**	Frontend HTML, CSS, and JavaScript for the web interface
package.json	Adds Express and type definitions

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[Copilot]

Same redundancy as line 201. Line 277 checks !Array.isArray(value.children), so the ternary is unnecessary. Simplify to value.children = [];.

Suggested change

	value.children = Array.isArray(value.children) ? value.children : [];
	value.children = [];