v2.5.4 - Linux fixes, take two

Linux only. Nothing changes on Windows - every fix here sits behind a platform check.

• You no longer need --ozone-platform=x11. The flag is baked into the packaged launcher itself. 2.5.3 claimed this and was wrong: the flag has to be on the real command line, and neither way the app tried to put it there actually reached it. Appending the switch in code only covers the browser process, so the GPU process still starts against Wayland and segfaults, which is why every hotkey then reported a false "taken by another app".
• The price-check hotkey falls back to your clipboard. If the app can't drive the game's copy - it can't on a GNOME Wayland session, where libuiohook fails to read the keyboard and sends mistranslated keycodes - press Ctrl+C in game yourself, then the hotkey, and it prices what you copied.
• Command hotkeys like /hideout fire again. They were asking "is the game focused", a question with no answer outside Windows, and treating no-answer as no.

Still not working on Linux: stash capture (F7). GNOME routes screen capture through the desktop portal regardless of the X11 backend, and that needs a dialog you can't reach behind a fullscreen game. It fails with an error after 8 seconds instead of hanging.

Downloads: Windows installer below, or the AppImage for Linux.