Wire everything up.

src/tui/mod.rs

@@ -1,5 +1,3 @@
-// Types and functions are scaffolding — wired into main.rs in Stage 1.6.
-#![allow(dead_code)]
 
 //! TUI frontend: terminal lifecycle, rendering, and input handling.
 //!
@@ -37,9 +35,6 @@ pub enum TuiError {
     /// An underlying terminal I/O error.
     #[error("terminal IO error: {0}")]
     Io(#[from] std::io::Error),
-    /// The action channel was closed before the event loop exited cleanly.
-    #[error("action channel closed")]
-    ChannelClosed,
 }
 
 /// The UI-layer view of a conversation: rendered messages and the current input buffer.
@@ -209,13 +204,13 @@ fn update_scroll(state: &mut AppState, area: Rect) {
 ///
 /// Layout (top to bottom):
 /// ```text
-/// ┌──────────────────────────────┐
-/// │  conversation history        │  Fill(1)
-/// │                              │
-/// ├──────────────────────────────┤
-/// │ Input                        │  Length(3)
-/// │ > _                          │
-/// └──────────────────────────────┘
+/// +--------------------------------+
+/// |  conversation history          |  Fill(1)
+/// |                                |
+/// +--------------------------------+
+/// |  Input                         |  Length(3)
+/// |  > _                           |
+/// +--------------------------------+
 /// ```
 ///
 /// Role headers are coloured: `"You:"` in cyan, `"Assistant:"` in green.
@@ -255,8 +250,8 @@ fn render(frame: &mut Frame, state: &AppState) {
 /// ```text
 /// loop:
 ///   1. drain UIEvents (non-blocking try_recv)
-///   2. poll keyboard for up to 16 ms  ← spawn_blocking keeps async runtime free
-///   3. handle key event → Option<LoopControl>
+///   2. poll keyboard for up to 16 ms  (<- spawn_blocking keeps async runtime free)
+///   3. handle key event -> Option<LoopControl>
 ///   4. render frame (scroll updated inside draw closure)
 ///   5. act on LoopControl: send message or break
 /// ```