fix: Ctrl+R flip also matches the physical R key (v1.6.1)

On some keymaps the R key resolves to a different logical key (observed on a
Turkish remote-desktop setup: the R key arrives as logical T), so the Ctrl+R
shortcut never fired even though the key events reached the app. The shortcut
now matches PhysicalKeyboardKey.keyR as well; a regression test covers the
wrong-layout case.

CHANGELOG.md

@@ -4,11 +4,18 @@ All notable changes to imajViewer are documented in this file.
 
 ## [Unreleased]
 
+## [1.6.1] - 2026-10-14
+
+### Fixed
+- Horizontal flip shortcut (`Ctrl+R`) never fired when the keyboard layout resolves the R key to a
+  different logical key (reported with a Turkish/remote-desktop setup where the R key arrives as
+  logical `T`). The shortcut now matches the physical R key position as well.
+
 ## [1.6.0] - 2026-10-14
 
 ### Added
-- Horizontal flip (`R` key): mirrors the image left-right about the viewport centre and clears
-  the active effects (same reset as double right click); pressing `R` again restores the
+- Horizontal flip (`Ctrl+R`): mirrors the image left-right about the viewport centre and clears
+  the active effects (same reset as double right click); pressing `Ctrl+R` again restores the
   original orientation. Zoom/pan are kept.
 - Crop save (`Ctrl+S`) now bakes the flip into the output as well, so the saved JPEG matches
   the mirrored view (also in combination with rotation).