* refactor(settings): remove current connection editor fields
Remove the active host, port, token fields, and clear token button from the main Connection tab, as profiles are now managed exclusively through the ProfileEditorDialog.
* feat(settings): migrate to full auto-save design and remove save button
Update settings change listeners (auto-reconnect, typing effect delay/toggle) to save state immediately to AuthManager. Remove the manual Save button from the scaffold's top bar and delete the redundant SaveIndicator.
* style(settings): clean up unused imports from settings UI cleanup
* fix(chat): resolve compose resource lint error and initial state test failure
Pre-resolve empty credentials string resource at the composable scope to fix LocalContext resource query lint error. Update testInitialStateAndConnection to use DISCONNECTED state to trigger connection and pass verification.