feat: settings version display, complete shortcut list, Ctrl fine zoom (v1.7.0)

README.md

@@ -12,7 +12,8 @@ Ultra-lightweight image viewer written in Flutter — Linux & Windows.
 
 - **Formats:** PNG, JPEG, JFIF, WebP, BMP, GIF, WBMP
 - **Pan:** Left drag
-- **Zoom:** Mouse wheel (cursor-centered; viewport-centered in rotate mode)
+- **Zoom:** Mouse wheel — 10% per step, cursor-centered (viewport-centered in rotate mode);
+  hold `Ctrl` for fine zoom (1% per step)
 - **Fill/Fit toggle:** Double left click
 - **Contrast:** Right drag + vertical move
 - **Saturation:** Ctrl + Right drag + vertical move
@@ -83,7 +84,8 @@ folder including `imajviewer.exe` and all DLLs).
 | Interaction | Action |
 |---|---|
 | Left drag | Pan |
-| Mouse wheel | Zoom (cursor-centered) |
+| Mouse wheel | Zoom (cursor-centered, 10% per step) |
+| Ctrl + Mouse wheel | Fine zoom (1% per step) |
 | Double left click | Fill / Fit toggle |
 | Right drag + vertical | Contrast (0.0 – 2.0) |
 | Ctrl + Right drag + vertical | Saturation (0.0 – 2.0) |
@@ -92,7 +94,9 @@ folder including `imajviewer.exe` and all DLLs).
 | Ctrl + R | Flip horizontally (clears effects; press again to undo) |
 | Double right click | Reset (all effects) |
 | Left / Right arrow | Previous / next image |
+| Ctrl + O | Open file |
 | Ctrl + S | Save visible area (JPEG 95, original resolution) |
+| Esc | Exit fullscreen |
 | Ctrl + Q | Close window |
 | Ctrl + Shift + Q | Close all windows |