rework patch/exec approval UI (#4573)

| Scenario | Screenshot |
| ---------------------- |
----------------------------------------------------------------------------------------------------------------------------------------------------
|
| short patch | <img width="1096" height="533" alt="short patch"
src="https://github.com/user-attachments/assets/8a883429-0965-4c0b-9002-217b3759b557"
/> |
| short command | <img width="1096" height="533" alt="short command"
src="https://github.com/user-attachments/assets/901abde8-2494-4e86-b98a-7cabaf87ca9c"
/> |
| long patch | <img width="1129" height="892" alt="long patch"
src="https://github.com/user-attachments/assets/fa799a29-a0d6-48e6-b2ef-10302a7916d3"
/> |
| long command | <img width="1096" height="892" alt="long command"
src="https://github.com/user-attachments/assets/11ddf79b-98cb-4b60-ac22-49dfa7779343"
/> |
| viewing complete patch | <img width="1129" height="892" alt="viewing
complete patch"
src="https://github.com/user-attachments/assets/81666958-af94-420e-aa66-b60d0a42b9db"
/> |

Author: nornagon-openai

codex-rs/tui/src/app.rs

@@ -1,10 +1,14 @@
 use crate::app_backtrack::BacktrackState;
 use crate::app_event::AppEvent;
 use crate::app_event_sender::AppEventSender;
+use crate::bottom_pane::ApprovalRequest;
 use crate::chatwidget::ChatWidget;
+use crate::diff_render::DiffSummary;
+use crate::exec_command::strip_bash_lc_and_escape;
 use crate::file_search::FileSearchManager;
 use crate::history_cell::HistoryCell;
 use crate::pager_overlay::Overlay;
+use crate::render::highlight::highlight_bash_to_lines;
 use crate::resume_picker::ResumeSelection;
 use crate::tui;
 use crate::tui::TuiEvent;
@@ -292,7 +296,7 @@ impl App {
                 } else {
                     text.lines().map(ansi_escape_line).collect()
                 };
-                self.overlay = Some(Overlay::new_static_with_title(
+                self.overlay = Some(Overlay::new_static_with_lines(
                     pager_lines,
                     "D I F F".to_string(),
                 ));
@@ -324,12 +328,18 @@ impl App {
                     Ok(()) => {
                         if let Some(profile) = profile {
                             self.chat_widget.add_info_message(
-                                format!("Model changed to {model} for {profile} profile"),
+                                format!("Model changed to {model}{reasoning_effort} for {profile} profile", reasoning_effort = effort.map(|e| format!(" {e}")).unwrap_or_default()),
                                 None,
                             );
                         } else {
-                            self.chat_widget
-                                .add_info_message(format!("Model changed to {model}"), None);
+                            self.chat_widget.add_info_message(
+                                format!(
+                                    "Model changed to {model}{reasoning_effort}",
+                                    reasoning_effort =
+                                        effort.map(|e| format!(" {e}")).unwrap_or_default()
+                                ),
+                                None,
+                            );
                         }
                     }
                     Err(err) => {
@@ -363,6 +373,25 @@ impl App {
             AppEvent::OpenReviewCustomPrompt => {
                 self.chat_widget.show_review_custom_prompt();
             }
+            AppEvent::FullScreenApprovalRequest(request) => match request {
+                ApprovalRequest::ApplyPatch { cwd, changes, .. } => {
+                    let _ = tui.enter_alt_screen();
+                    let diff_summary = DiffSummary::new(changes, cwd);
+                    self.overlay = Some(Overlay::new_static_with_renderables(
+                        vec![diff_summary.into()],
+                        "P A T C H".to_string(),
+                    ));
+                }
+                ApprovalRequest::Exec { command, .. } => {
+                    let _ = tui.enter_alt_screen();
+                    let full_cmd = strip_bash_lc_and_escape(&command);
+                    let full_cmd_lines = highlight_bash_to_lines(&full_cmd);
+                    self.overlay = Some(Overlay::new_static_with_lines(
+                        full_cmd_lines,
+                        "E X E C".to_string(),
+                    ));
+                }
+            },
         }
         Ok(true)
     }

codex-rs/tui/src/app_event.rs

@@ -4,6 +4,7 @@ use codex_core::protocol::ConversationPathResponseEvent;
 use codex_core::protocol::Event;
 use codex_file_search::FileMatch;
 
+use crate::bottom_pane::ApprovalRequest;
 use crate::history_cell::HistoryCell;
 
 use codex_core::protocol::AskForApproval;
@@ -76,4 +77,7 @@ pub(crate) enum AppEvent {
 
     /// Open the custom prompt option from the review popup.
     OpenReviewCustomPrompt,
+
+    /// Open the approval popup.
+    FullScreenApprovalRequest(ApprovalRequest),
 }