Fix desktop showing the mobile layout: decide layout from the actual build platform (cfg!(mobile)) instead of sniffing the webview user-agent, which some WebKitGTK builds report mobile-looking (#63)

src-tauri/src/commands.rs

@@ -2364,6 +2364,13 @@ fn save_app_config(config: &AppConfig) -> Result<(), String> {
 
 // ── Install Type Detection ──
 
+#[tauri::command]
+pub fn is_mobile_platform() -> bool {
+    // Compile-time platform: true only for the Android/iOS builds. Authoritative, unlike the
+    // webview user-agent, which some desktop WebKitGTK builds report mobile-looking (issue #63).
+    cfg!(mobile)
+}
+
 #[tauri::command]
 pub fn get_install_type() -> String {
     // Build-time override for distro packagers (e.g. Solus): build with