feat(tui): add usage overlay and sidebar for displaying usage statistics and tasks

feat(tui): implement status bar with connection and turn state indicators
feat(tui): create workflow panel for agent status and progress visualization
feat(web): introduce web frontend interface with static file serving
feat(ws): add WebSocket interface for real-time communication and session management

apps/infrastructure/src/bgbash/mod.rs

@@ -0,0 +1,5 @@
+//! Background bash job management — spawn, track, and query long-running
+//! shell processes.
+
+pub mod control;
+pub mod job;