refactor: remove AttachImage tui event (#3191)

TuiEvent is supposed to be purely events that come from the "driver",
i.e. events from the terminal. Everything app-specific should be an
AppEvent. In this case, it didn't need to be an event at all.

codex-rs/tui/src/app.rs

@@ -183,15 +183,6 @@ impl App {
                         },
                     )?;
                 }
-                TuiEvent::AttachImage {
-                    path,
-                    width,
-                    height,
-                    format_label,
-                } => {
-                    self.chat_widget
-                        .attach_image(path, width, height, format_label);
-                }
             }
         }
         Ok(true)

codex-rs/tui/src/chatwidget.rs

@@ -57,6 +57,7 @@ use crate::bottom_pane::CancellationEvent;
 use crate::bottom_pane::InputResult;
 use crate::bottom_pane::SelectionAction;
 use crate::bottom_pane::SelectionItem;
+use crate::clipboard_paste::paste_image_to_temp_png;
 use crate::get_git_diff::get_git_diff;
 use crate::history_cell;
 use crate::history_cell::CommandOutput;
@@ -745,6 +746,17 @@ impl ChatWidget {
                 self.on_ctrl_c();
                 return;
             }
+            KeyEvent {
+                code: KeyCode::Char('v'),
+                modifiers: KeyModifiers::CONTROL,
+                kind: KeyEventKind::Press,
+                ..
+            } => {
+                if let Ok((path, info)) = paste_image_to_temp_png() {
+                    self.attach_image(path, info.width, info.height, info.encoded_format.label());
+                }
+                return;
+            }
             other if other.kind == KeyEventKind::Press => {
                 self.bottom_pane.clear_ctrl_c_quit_hint();
             }

codex-rs/tui/src/tui.rs

@@ -1,7 +1,6 @@
 use std::io::Result;
 use std::io::Stdout;
 use std::io::stdout;
-use std::path::PathBuf;
 use std::pin::Pin;
 use std::sync::Arc;
 use std::sync::atomic::AtomicBool;
@@ -20,10 +19,7 @@ use crossterm::cursor::MoveTo;
 use crossterm::event::DisableBracketedPaste;
 use crossterm::event::EnableBracketedPaste;
 use crossterm::event::Event;
-use crossterm::event::KeyCode;
 use crossterm::event::KeyEvent;
-use crossterm::event::KeyEventKind;
-use crossterm::event::KeyModifiers;
 use crossterm::event::KeyboardEnhancementFlags;
 use crossterm::event::PopKeyboardEnhancementFlags;
 use crossterm::event::PushKeyboardEnhancementFlags;
@@ -38,7 +34,6 @@ use ratatui::crossterm::terminal::enable_raw_mode;
 use ratatui::layout::Offset;
 use ratatui::text::Line;
 
-use crate::clipboard_paste::paste_image_to_temp_png;
 use crate::custom_terminal;
 use crate::custom_terminal::Terminal as CustomTerminal;
 use tokio::select;
@@ -154,12 +149,6 @@ pub enum TuiEvent {
     Key(KeyEvent),
     Paste(String),
     Draw,
-    AttachImage {
-        path: PathBuf,
-        width: u32,
-        height: u32,
-        format_label: &'static str,
-    },
 }
 
 pub struct Tui {
@@ -305,29 +294,6 @@ impl Tui {
                 select! {
                     Some(Ok(event)) = crossterm_events.next() => {
                         match event {
-                            // Detect Ctrl+V to attach an image from the clipboard.
-                            Event::Key(key_event @ KeyEvent {
-                                code: KeyCode::Char('v'),
-                                modifiers: KeyModifiers::CONTROL,
-                                kind: KeyEventKind::Press,
-                                ..
-                            }) => {
-                                match paste_image_to_temp_png() {
-                                    Ok((path, info)) => {
-                                        yield TuiEvent::AttachImage {
-                                            path,
-                                            width: info.width,
-                                            height: info.height,
-                                            format_label: info.encoded_format.label(),
-                                        };
-                                    }
-                                    Err(_) => {
-                                        // Fall back to normal key handling if no image is available.
-                                        yield TuiEvent::Key(key_event);
-                                    }
-                                }
-                            }
-
                             crossterm::event::Event::Key(key_event) => {
                                 #[cfg(unix)]
                                 if matches!(