/iblai-vibe-agent-lti

Add the agent LTI tab -- let the agent be added to a Learning Management System (Canvas, Brightspace, Blackboard or Moodle) so students can open it right inside their course. A master "LTI launches" toggle gates four sub-tabs: Links (the LTI link that launches this agent), Keys (platform-wide RSA signing keys), Tools (integrations with external LTI platforms), and Tool Endpoints (the fixed URLs to share with the LMS). This is one tab in the wider agent-settings family. All tabs share the same AgentSettingsProvider wrapper.