docs: README screenshots for the Steam Machine and for NVIDIA PCs, side by side

AGENTS.md

@@ -156,9 +156,12 @@ gamescope and the Plasma desktop. Primary target: the Valve Steam Machine
     a warning when `VERSION` is a version that's already released (so a
     release branch that forgot its bump shows it on every PR).
   - A release that adds, removes or renames a menu row also retakes the
-    README screenshot (`assets/screenshot-menu.png`): the app from the
+    README screenshots (`assets/screenshot-menu-steam-machine.png` and
-    branch on a Steam Machine, every row visible (window 1280 wide, tall
+    `assets/screenshot-menu-nvidia.png`, side by side in the README): the app from the branch on a Steam Machine and on a PC
-    enough), the header showing the new `VERSION`, scaled to 1600 px wide.
+    with an NVIDIA card, every row visible and each window only as tall as its options need, the header showing the new
+    `VERSION`, 1600 px wide. Size the window with a KWin script (match the `steamify-ui` class exactly: a title match also hits
+    Konsole and editor windows) and crop the full-screen capture to the client rectangle; mind the display scale (the Steam
+    Machine runs at 1.75).
   - Users install through `releases/latest/download/steamify.sh`
     (GitHub's newest release). The `latest` tag and release follow the newest
     version tag too (moved, asset replaced, when a new version is released),

CHANGELOG.md

@@ -12,6 +12,7 @@ one per merged pull request.
 - **fix: "Add as non-Steam game" isn't offered on NVIDIA PCs (there is no gaming mode there for it to give the controller; shown when already on, so it can be turned off)**
 - **feat: Extended controller support (extended_controller_support, off by default): the Xbox wireless dongle (xone-dkms, xone-dongle-firmware) and Xbox controllers over Bluetooth with rumble, button mapping and battery level (xpadneo-dkms), from the CachyOS repo, built for every installed kernel; a PC with the AUR's xone-dkms-git keeps it; off removes only what Steamify installed (lib/controllers.sh, tests/controllers-test.sh)**
 - **feat: a new opt-in option (unticked by default, e.g. Extended controller support) shows the "new" badge in the menu and the app without being ticked for you (feature_new_optin); it counts "Gaming on NVIDIA" as its parent where the conversion isn't offered**
+- **docs: README screenshots of the 2.10.0 app, side by side: on a Steam Machine and on a PC with an NVIDIA card**
 - **test: tests/nvidia-test.sh runs it against a fake RTX 5080 beside an iGPU, a stub pacman and systemctl, and a temp home (no root, VM or hardware); verified on a real RTX 5080: gamescope's session, a nested gamescope and a KWin-only session all showed artifacts or stutter, Big Picture on the Plasma desktop did not**
 
 ## 2.9.6 - 2026-09-30

README.md

@@ -1,6 +1,14 @@
 # Steamify CachyOS
 
-![The Steamify app's menu on a Steam Machine](assets/screenshot-menu.png)
+The Steamify app's menu. On a Steam Machine (or any PC with an AMD or Intel
+graphics card) it offers the full SteamOS conversion, on the left. On a PC with
+an NVIDIA graphics card gamescope's gaming mode shows a corrupted picture, so the
+menu offers **Gaming on NVIDIA** instead (Steam on the desktop, started at login,
+optionally in Big Picture), on the right.
+
+| On a Steam Machine | On a PC with an NVIDIA graphics card |
+|---|---|
+| ![The Steamify app's menu on a Steam Machine](assets/screenshot-menu-steam-machine.png) | ![The Steamify app's menu on a PC with an NVIDIA graphics card](assets/screenshot-menu-nvidia.png) |
 
 Turn a CachyOS desktop PC into a SteamOS-style console: it boots straight
 into Steam's Big Picture (gamescope), and you can switch to the KDE Plasma