Reconstruct XamlBrowser sample with XAML from decompiled code

Created complete XamlBrowser sample application:
- App.xaml: Colors and styles for light/dark theme support
- App.xaml.cs: BrowserApp with ToggleTheme()
- MainPage.xaml: Toolbar (Back, Forward, Refresh, Stop, Home),
  address bar, Go button, WebView, status bar with theme toggle
- MainPage.xaml.cs: Navigation logic, URL handling, progress animation
- MauiProgram.cs: UseLinuxPlatform() configuration
- Program.cs: LinuxProgramHost entry point
- Resources/Images: 10 SVG icons for toolbar (dark/light variants)

UI matches screenshot provided by user:
- Dark gray toolbar with navigation buttons
- Entry field for URL with rounded corners
- Green "Go" button
- WebView displaying content
- Status bar with theme toggle

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

CLAUDE.md

@@ -54,12 +54,17 @@ git branch  # Should show: * final
 | NewTodoPage.xaml | [ ] | Add new todo form |
 | TodoDetailPage.xaml | [ ] | Edit todo details |
 
-### XamlBrowser (app + 1 page)
+### XamlBrowser (app + 1 page) - COMPLETE
 
 | File | Status | Notes |
 |------|--------|-------|
-| BrowserApp.xaml | [ ] | Basic app setup |
-| MainPage.xaml | [ ] | WebView browser |
+| App.xaml | [x] | Colors, styles (NavButtonStyle, GoButtonStyle, AddressBarStyle, StatusLabelStyle) |
+| App.xaml.cs | [x] | BrowserApp with ToggleTheme() |
+| MainPage.xaml | [x] | Toolbar with nav buttons, address bar, WebView, status bar |
+| MainPage.xaml.cs | [x] | Navigation logic, progress animation, theme toggle |
+| MauiProgram.cs | [x] | UseLinuxPlatform() setup |
+| Program.cs | [x] | LinuxProgramHost entry point |
+| Resources/Images/*.svg | [x] | 10 toolbar icons (dark/light variants) |
 
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