Phase 2 of Data Sovereignty Zone implementation:
- Create GoogleDataBrowser component with service tabs (Gmail, Drive, Photos, Calendar)
- Searchable item list with checkboxes for multi-select
- Select All/Clear functionality
- Dark mode support with consistent styling
- "Add to Private Workspace" button
- Privacy note explaining local-only encryption
- Emits 'add-google-items-to-canvas' event for Board.tsx integration
Integration with UserSettingsModal:
- Import and render GoogleDataBrowser when "Open Data Browser" clicked
- Handler for adding selected items to canvas
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Co-Authored-By: Claude <noreply@anthropic.com>