Hide /debug slash commands from popup menu (#11974)

Summary
- filter command popup builtins to remove any `/debug*` entries so they
stay usable but are not listed
- added regression tests to ensure the popup hides debug commands while
dispatch still resolves them

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

@@ -45,12 +45,15 @@ pub(crate) struct CommandPopupFlags {
 impl CommandPopup {
     pub(crate) fn new(mut prompts: Vec<CustomPrompt>, flags: CommandPopupFlags) -> Self {
         // Keep built-in availability in sync with the composer.
-        let builtins = slash_commands::builtins_for_input(
+        let builtins: Vec<(&'static str, SlashCommand)> = slash_commands::builtins_for_input(
             flags.collaboration_modes_enabled,
             flags.connectors_enabled,
             flags.personality_command_enabled,
             flags.windows_degraded_sandbox_active,
-        );
+        )
+        .into_iter()
+        .filter(|(name, _)| !name.starts_with("debug"))
+        .collect();
         // Exclude prompts that collide with builtin command names and sort by name.
         let exclude: HashSet<String> = builtins.iter().map(|(n, _)| (*n).to_string()).collect();
         prompts.retain(|p| !exclude.contains(&p.name));
@@ -566,4 +569,22 @@ mod tests {
             other => panic!("expected personality to be selected for exact match, got {other:?}"),
         }
     }
+
+    #[test]
+    fn debug_commands_are_hidden_from_popup() {
+        let popup = CommandPopup::new(Vec::new(), CommandPopupFlags::default());
+        let cmds: Vec<&str> = popup
+            .filtered_items()
+            .into_iter()
+            .filter_map(|item| match item {
+                CommandItem::Builtin(cmd) => Some(cmd.command()),
+                CommandItem::UserPrompt(_) => None,
+            })
+            .collect();
+
+        assert!(
+            !cmds.iter().any(|name| name.starts_with("debug")),
+            "expected no /debug* command in popup menu, got {cmds:?}"
+        );
+    }
 }

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

@@ -63,3 +63,15 @@ pub(crate) fn has_builtin_prefix(
     .into_iter()
     .any(|(command_name, _)| fuzzy_match(command_name, name).is_some())
 }
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use pretty_assertions::assert_eq;
+
+    #[test]
+    fn debug_command_still_resolves_for_dispatch() {
+        let cmd = find_builtin_command("debug-config", true, true, true, false);
+        assert_eq!(cmd, Some(SlashCommand::DebugConfig));
+    }
+}