fix: AppImage EGL crash on modern distros, update link capability (v1.4.2)

- Switch Linux CI build from ubuntu-22.04 to ubuntu-24.04 — bundles
  WebKitGTK 2.44 which uses eglGetPlatformDisplay instead of the
  deprecated eglGetDisplay(EGL_DEFAULT_DISPLAY) that fails on Mesa 25.x
  (CachyOS/Arch with RDNA 4 and other modern hardware)
- Add EGL_PLATFORM=x11 to AppRun as additional safeguard for XWayland
- Fix shell:allow-open capability missing URL scope (update toast link
  was silently blocked by Tauri v2 without explicit allow-list)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src-tauri/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "psysonic"
-version = "1.4.1"
+version = "1.4.2"
 description = "Psysonic Desktop Music Player"
 authors = []
 license = ""

src-tauri/capabilities/default.json

@@ -7,7 +7,7 @@
   "permissions": [
     "core:default",
     "shell:default",
-    "shell:allow-open",
+    { "identifier": "shell:allow-open", "allow": [{ "url": "https://**" }] },
     "notification:default",
     "global-shortcut:allow-register",
     "global-shortcut:allow-unregister",

src-tauri/tauri.conf.json

@@ -1,7 +1,7 @@
 {
   "$schema": "https://schema.tauri.app/config/2",
   "productName": "Psysonic",
-  "version": "1.4.1",
+  "version": "1.4.2",
   "identifier": "dev.psysonic.app",
   "build": {
     "beforeDevCommand": "npm run dev",