feat(oci): enable xdg-desktop-portal for GTK/Qt apps by default

Sets GTK_USE_PORTAL=1 and QT_QPA_PLATFORMTHEME=xdgdesktopportal
to ensure file dialogs use the host portal when running sandboxed.

Signed-off-by: ComixHe <ComixHe1895@outlook.com>

Author: ComixHe

libs/oci-cfg-generators/src/linglong/oci-cfg-generators/container_cfg_builder.cpp

@@ -1450,6 +1450,11 @@ utils::error::Result<void> ContainerCfgBuilder::buildEnv() noexcept
         environment["LINGLONG_APPID"] = appId;
     }
 
+    if (!disableGenerateContainerInfo) {
+        environment.try_emplace("GTK_USE_PORTAL", "1");
+        environment.try_emplace("QT_QPA_PLATFORMTHEME", "xdgdesktopportal");
+    }
+
     auto envShFile = bundlePath / "00env.sh";
     std::ofstream ofs(envShFile);
     if (!ofs.is_open()) {

libs/oci-cfg-generators/src/linglong/oci-cfg-generators/container_cfg_builder.h

@@ -325,7 +325,7 @@ class ContainerCfgBuilder
 
     bool isolateNetWorkEnabled = false;
     bool disableUserNamespaceEnabled = false;
-    bool disableGenerateContainerInfo{ true };
+    bool disableGenerateContainerInfo{ false };
     bool applyPatchEnabled = true;
     bool isolateTmp{ false };
     bool devPassthru{ false };