feat: toggle diff file review with c in the file picker

src/editor.rs

@@ -3232,6 +3232,22 @@ impl Editor {
         if !self.diff_interacting() && self.handle_selection_binding(&input) {
             return None;
         }
+        if files_focused
+            && input == Input::Char('c')
+            && self
+                .diff
+                .as_ref()
+                .and_then(|diff| diff.files.as_ref())
+                .is_some_and(|files| files.view == FileView::Tree && !files.searching)
+            && input != self.leader
+            && !self.has_sequence_prefix(self.binding_mode(), &input)
+            && !self
+                .bindings
+                .get(&self.binding_mode())
+                .is_some_and(|keys| keys.contains_key(&input))
+        {
+            return self.execute_action(Action::DiffReviewToggle.entry(), "");
+        }
         if self.sequence_pending().is_some()
             || (phase == Phase::View
                 && (input == self.leader || self.has_sequence_prefix(self.binding_mode(), &input)))
@@ -13575,6 +13591,33 @@ mod tests {
         assert!(editor.diff().unwrap().reviewed_files.is_empty());
     }
 
+    #[test]
+    fn diff_review_c_toggles_only_while_browsing_and_respects_overrides() {
+        let directory = Directory::new();
+        let mut editor = editor();
+        historical_diff(
+            &mut editor,
+            &directory.0,
+            vec!["before".into()],
+            vec!["after".into()],
+        );
+        editor.handle(Input::BackTab);
+        assert_eq!(editor.diff().unwrap().focus, Focus::Files);
+        editor.handle(Input::Char('c'));
+        assert_eq!(editor.diff().unwrap().reviewed_files, BTreeSet::from([0]));
+        editor.handle(Input::Char('c'));
+        assert!(editor.diff().unwrap().reviewed_files.is_empty());
+        editor.handle(Input::Char('i'));
+        editor.handle(Input::Char('c'));
+        assert_eq!(editor.diff().unwrap().files.as_ref().unwrap().query, "c");
+        assert!(editor.diff().unwrap().reviewed_files.is_empty());
+        editor.handle(Input::Escape);
+        editor.handle(Input::Ctrl('u'));
+        editor.bind("normal", "c", None).unwrap();
+        editor.handle(Input::Char('c'));
+        assert!(editor.diff().unwrap().reviewed_files.is_empty());
+    }
+
     #[test]
     fn diff_review_files_action_targets_highlight_without_stealing_filter_text() {
         let directory = Directory::new();