Replace window.open() with Tauri's opener plugin (openUrl) so that
clicking a URL property in the Properties panel opens the system
browser instead of failing silently or triggering edit mode.
- Install @tauri-apps/plugin-opener (npm + Cargo + capabilities)
- Add openExternalUrl() utility with Tauri/browser fallback
- Add stopPropagation to prevent accidental edit mode activation
- Add double-click guard (500ms debounce via ref)
- Update tests to mock openExternalUrl instead of window.open
- Add explicit test that URL click does not trigger onStartEdit
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
- Add UrlValue component: click opens in browser, pencil icon for edit
- URL detection via isUrlValue() (http/https URLs + bare domains)
- URL normalization: prepends https:// to bare domains
- Malformed URLs silently ignored (no open attempt)
- Long URLs truncated visually but full URL opens on click
- Edit mode via pencil icon or keyboard (Enter/Escape/blur)
- 22 new tests covering detection, normalization, and component behavior
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
