feat(nodepod): add browser workspace demo

[wyf027]

Summary

• add a Nodepod browser workspace demo under project/nodepod-demo
• include file explorer, Monaco editor, multi-terminal, preview, and resizable grid panels
• add local ignore rules for generated dist and node_modules

Validation

• npx prettier --write project/nodepod-demo/index.html project/nodepod-demo/package.json project/nodepod-demo/src/main.jsx project/nodepod-demo/src/styles.css project/nodepod-demo/vite.config.js
• npm ci
• npm exec vite -- build
• bash ~/.cursor/skills/git-commit/scripts/run-audit.sh
• npm audit --audit-level=high

Note: npm audit --audit-level=high exits successfully; npm still reports low/moderate advisories in the Monaco/DOMPurify dependency chain. npm audit fix --force would apply a breaking Monaco version change, so it was not run.

[chatgpt-codex-connector]

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[chatgpt-codex-connector]

Refresh the editor when the selected file disappears

When refreshFileSystem({ preserveEditor: true }) runs after a terminal command or watcher event deletes/renames the selected file, this fallback selects a different file but the preserved-editor path skips openFile, so selectedFilePathRef and editorValue still point to the removed file while the UI title changes. A later Save or restart can silently recreate/overwrite the old path instead of editing the displayed file; handle the “selected file missing” case by clearing the editor or opening the fallback even when preserving normal editor contents.

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