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/interfaces/daemon/src/lib.rs

@@ -0,0 +1,33 @@
+//! # Daemon Interface
+//!
+//! Background process that owns agent state and communicates with TUI
+//! clients over a Unix-socket IPC protocol.
+//!
+//! ## Architecture
+//!
+//! ```text
+//! src/
+//! ├── lib.rs        — Crate root, module declarations, re-exports
+//! ├── server.rs     — Daemon server: session creation, socket bind, client loop
+//! ├── client.rs     — IPC client for attaching to daemon (moved from attach mode)
+//! ├── key_code.rs   — KeyCode <-> KeyAction conversions
+//! ├── state.rs      — AppStateRest, DaemonState, supporting types, create_session
+//! └── handler.rs    — Action, apply_action, handle_key, IPC request handler
+//! ```
+//!
+//! ## Modes
+//!
+//! - **Server** (`run_daemon`): creates a session, binds a Unix socket, accepts
+//!   incoming clients, and processes their IPC `ClientRequest`s.
+//! - **Client** (`run_attach`): connects to a running daemon over its Unix socket,
+//!   enters raw TUI mode, forwards keystrokes, and renders state updates.
+
+pub mod client;
+pub mod handler;
+pub mod key_code;
+pub mod server;
+pub mod state;
+
+// Re-export key types for convenience.
+pub use handler::{apply_action, Action};
+pub use state::{AppStateRest, DaemonState, Overlay};