Motivation

• Fix the issue where the LLM login prompt and its success/error notifications are blocked by the Settings dialog and only appear after Settings is closed, by ensuring dialogs shown from background threads are not constrained by the current modal context.

Description

• Added ModalityState import and changed invokeLater calls to use invokeLater(..., ModalityState.any()) for login success and error notifications in LlmAuthSessionService.
• Replaced app.invokeAndWait(showDialog) with app.invokeAndWait(showDialog, ModalityState.any()) so the credential dialog can appear immediately when triggered from a background thread.
• Changes are contained in plugin-idea/src/main/kotlin/org/openprojectx/ai/plugin/LlmAuthSessionService.kt.

Testing

• Attempted to compile the module with ./gradlew :plugin-idea:compileKotlin, but compilation could not complete in this environment due to a missing Gradle wrapper runtime class org.gradle.wrapper.GradleWrapperMain (so build verification is pending).
• No additional automated tests were run in this environment.

Codex Task