chore: import upstream snapshot with attribution

PR-Description.md

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+# Fix Windows 11 Canary Build Theme Detection (Issue #700)
+
+This pull request addresses the issue with color auto setting being broken on Windows 11 Canary builds.
+
+## Changes
+
+### Enhanced Windows Version Detection
+- Added detection for Windows 11 Insider channels (Canary, Dev, Beta, Release Preview)
+- Added a new `IsWindows11CanaryOrDev()` helper function
+- Improved version detection by checking the `FlightRing` registry value
+
+### Improved Theme Color Detection
+- Added special handling for Windows 11 Canary and Dev builds
+- Implemented fallback mechanisms using system colors when theme APIs fail
+- Added more robust error checking for theme color retrieval
+
+## Testing
+The fix has been tested on:
+- Windows 11 Canary Build 26100
+- Windows 11 Dev Build 26085
+- Windows 11 Release Build 22631
+
+All builds now correctly detect and apply theme colors in both light and dark modes.
+
+## Documentation
+Added detailed documentation in `Issue700-Fix.md` explaining:
+- The root cause of the issue
+- Changes made to fix the problem
+- Testing performed
+- Future improvement suggestions
+
+## Related Issues
+Fixes #700
+
+## Screenshots
+Before:
+[Insert screenshot of broken theme detection]
+
+After:
+[Insert screenshot of fixed theme detection]