chore: /multiagent alias for /agent (#13249)

Add a `/mutli-agents` alias for `/agent` and update the wording

codex-rs/tui/src/app.rs

@@ -1246,8 +1246,8 @@ impl App {
             .collect();
 
         self.chat_widget.show_selection_view(SelectionViewParams {
-            title: Some("Agents".to_string()),
-            subtitle: Some("Select a thread to focus".to_string()),
+            title: Some("Multi-agents".to_string()),
+            subtitle: Some("Select an agent to watch".to_string()),
             footer_hint: Some(standard_popup_hint_line()),
             items,
             initial_selected_idx,

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

@@ -342,7 +342,7 @@ mod tests {
                 CommandItem::UserPrompt(_) => None,
             })
             .collect();
-        assert_eq!(cmds, vec!["model", "mention", "mcp"]);
+        assert_eq!(cmds, vec!["model", "mention", "mcp", "multi-agents"]);
     }
 
     #[test]

codex-rs/tui/src/chatwidget.rs

@@ -3609,7 +3609,7 @@ impl ChatWidget {
                 }
                 self.open_collaboration_modes_popup();
             }
-            SlashCommand::Agent => {
+            SlashCommand::Agent | SlashCommand::MultiAgents => {
                 self.app_event_tx.send(AppEvent::OpenAgentPicker);
             }
             SlashCommand::Approvals => {

codex-rs/tui/src/slash_command.rs

@@ -53,6 +53,7 @@ pub enum SlashCommand {
     Realtime,
     Settings,
     TestApproval,
+    MultiAgents,
     // Debugging commands.
     #[strum(serialize = "debug-m-drop")]
     MemoryDrop,
@@ -93,7 +94,7 @@ impl SlashCommand {
             SlashCommand::Settings => "configure realtime microphone/speaker",
             SlashCommand::Plan => "switch to Plan mode",
             SlashCommand::Collab => "change collaboration mode (experimental)",
-            SlashCommand::Agent => "switch the active agent thread",
+            SlashCommand::Agent | SlashCommand::MultiAgents => "switch the active agent thread",
             SlashCommand::Approvals => "choose what Codex is allowed to do",
             SlashCommand::Permissions => "choose what Codex is allowed to do",
             SlashCommand::ElevateSandbox => "set up elevated agent sandbox",
@@ -167,7 +168,7 @@ impl SlashCommand {
             SlashCommand::Realtime => true,
             SlashCommand::Settings => true,
             SlashCommand::Collab => true,
-            SlashCommand::Agent => true,
+            SlashCommand::Agent | SlashCommand::MultiAgents => true,
             SlashCommand::Statusline => false,
             SlashCommand::Theme => false,
         }