release: 1.0.1, branded theme default and test-suite review

Move post-v1.0.0 changes out of the 1.0.0 changelog section into 1.0.1,
where they belong: GoSentry theme as default, System label, About GitHub link,
Disable auto inset, README @every docs, and the completed test-suite review.

Co-authored-by: Cursor <cursoragent@cursor.com>

src/app/version.go

@@ -3,4 +3,4 @@ package app
 // Version is the application version shown in the GUI and used by build
 // scripts in artifact names. It is a var rather than a const so release builds
 // can override it with Go ldflags when CI tags a build.
-var Version = "1.0.0"
+var Version = "1.0.1"