fix(tui): remove duplicate context statusline item (#18054)

Addresses #18045

Problem: `/statusline` exposed both `context-remaining` and
`context-remaining-percent` after conflicting PRs attempted to address
the same context-status issue, including #17637, allowing duplicate
footer segments.

Solution: Remove the duplicate `context-remaining-percent` status-line
item and update status-line tests and snapshots to use only canonical
`context-remaining`.

codex-rs/tui/src/bottom_pane/snapshots/codex_tui__bottom_pane__status_line_setup__tests__setup_view_snapshot_uses_runtime_preview_values.snap

@@ -8,14 +8,14 @@ expression: "render_lines(&view, 72)"
                                                                         
   Type to search                                                        
   >                                                                     
-› [x] model-name             Current model name                         
-  [x] current-dir            Current working directory                  
-  [x] git-branch             Current Git branch (omitted when unavail…  
-  [ ] model-with-reasoning   Current model name with reasoning level    
-  [ ] project-root           Project root directory (omitted when una…  
-  [ ] context-remaining      Percentage of context window remaining (…  
-  [ ] context-remaining-...  Percentage of context window remaining (…  
-  [ ] context-used           Percentage of context window used (omitt…  
+› [x] model-name            Current model name                          
+  [x] current-dir           Current working directory                   
+  [x] git-branch            Current Git branch (omitted when unavaila…  
+  [ ] model-with-reasoning  Current model name with reasoning level     
+  [ ] project-root          Project root directory (omitted when unav…  
+  [ ] context-remaining     Percentage of context window remaining (o…  
+  [ ] context-used          Percentage of context window used (omitte…  
+  [ ] five-hour-limit       Remaining usage on 5-hour usage limit (om…  
                                                                         
   gpt-5-codex · ~/codex-rs · jif/statusline-preview                     
   Use ↑↓ to navigate, ←→ to move, space to select, enter to confirm, esc

codex-rs/tui/src/bottom_pane/status_line_setup.rs

@@ -66,10 +66,6 @@ pub(crate) enum StatusLineItem {
     /// Percentage of context window remaining.
     ContextRemaining,
 
-    /// Percentage of context window remaining.
-    #[strum(to_string = "context-remaining-percent")]
-    ContextRemainingPercent,
-
     /// Percentage of context window used.
     ///
     /// Also accepts the legacy `context-usage` config value.
@@ -119,9 +115,6 @@ impl StatusLineItem {
             StatusLineItem::ContextRemaining => {
                 "Percentage of context window remaining (omitted when unknown)"
             }
-            StatusLineItem::ContextRemainingPercent => {
-                "Percentage of context window remaining (omitted when unknown)"
-            }
             StatusLineItem::ContextUsed => {
                 "Percentage of context window used (omitted when unknown)"
             }
@@ -321,7 +314,7 @@ mod tests {
     }
 
     #[test]
-    fn context_remaining_is_separate_selectable_id() {
+    fn context_remaining_is_selectable_id() {
         assert_eq!(
             "context-remaining".parse::<StatusLineItem>(),
             Ok(StatusLineItem::ContextRemaining)
@@ -332,18 +325,6 @@ mod tests {
         );
     }
 
-    #[test]
-    fn context_remaining_percent_is_separate_selectable_id() {
-        assert_eq!(
-            StatusLineItem::ContextRemainingPercent.to_string(),
-            "context-remaining-percent"
-        );
-        assert_eq!(
-            "context-remaining-percent".parse::<StatusLineItem>(),
-            Ok(StatusLineItem::ContextRemainingPercent)
-        );
-    }
-
     #[test]
     fn preview_uses_runtime_values() {
         let preview_data = StatusLinePreviewData::from_iter([

codex-rs/tui/src/chatwidget/status_surfaces.rs

@@ -450,7 +450,7 @@ impl ChatWidget {
                     Some(format!("{} used", format_tokens_compact(total)))
                 }
             }
-            StatusLineItem::ContextRemaining | StatusLineItem::ContextRemainingPercent => self
+            StatusLineItem::ContextRemaining => self
                 .status_line_context_remaining_percent()
                 .map(|remaining| format!("Context {remaining}% left")),
             StatusLineItem::ContextUsed => self

codex-rs/tui/src/chatwidget/tests/status_and_layout.rs

@@ -914,24 +914,6 @@ async fn status_line_legacy_context_usage_renders_context_used_percent() {
     );
 }
 
-#[tokio::test]
-async fn status_line_context_remaining_percent_renders_labeled_percent() {
-    let (mut chat, mut rx, _op_rx) = make_chatwidget_manual(/*model_override*/ None).await;
-    chat.thread_id = Some(ThreadId::new());
-    chat.config.tui_status_line = Some(vec!["context-remaining-percent".to_string()]);
-
-    chat.refresh_status_line();
-
-    assert_eq!(
-        status_line_text(&chat),
-        Some("Context 100% left".to_string())
-    );
-    assert!(
-        drain_insert_history(&mut rx).is_empty(),
-        "context-remaining-percent should remain a valid status line item"
-    );
-}
-
 #[tokio::test]
 async fn status_line_branch_state_resets_when_git_branch_disabled() {
     let (mut chat, _rx, _op_rx) = make_chatwidget_manual(/*model_override*/ None).await;
@@ -1200,7 +1182,7 @@ async fn status_line_model_with_reasoning_fast_footer_snapshot() {
 }
 
 #[tokio::test]
-async fn status_line_model_with_reasoning_context_remaining_percent_footer_snapshot() {
+async fn status_line_model_with_reasoning_context_remaining_footer_snapshot() {
     use ratatui::Terminal;
     use ratatui::backend::TestBackend;
 
@@ -1211,7 +1193,7 @@ async fn status_line_model_with_reasoning_context_remaining_percent_footer_snaps
     chat.config.cwd = test_project_path().abs();
     chat.config.tui_status_line = Some(vec![
         "model-with-reasoning".to_string(),
-        "context-remaining-percent".to_string(),
+        "context-remaining".to_string(),
         "current-dir".to_string(),
     ]);
     chat.set_reasoning_effort(Some(ReasoningEffortConfig::XHigh));
@@ -1228,7 +1210,7 @@ async fn status_line_model_with_reasoning_context_remaining_percent_footer_snaps
         .draw(|f| chat.render(f.area(), f.buffer_mut()))
         .expect("draw model-with-reasoning footer");
     assert_chatwidget_snapshot!(
-        "status_line_model_with_reasoning_context_remaining_percent_footer",
+        "status_line_model_with_reasoning_context_remaining_footer",
         normalized_backend_snapshot(terminal.backend())
     );
 }