Improve CLI command inline pane and monitoring behavior

- Track user-initiated expansion state to avoid auto-collapse conflicts
- Invert inline action visibility so terminal block hides while inline pane owns the expanded body
- Add scrollable output rendering in requested command expanded view
- Simplify CLI monitor nudge message and extract to reusable method
- Show only latest user query and assistant text in monitor task transcript
- Add handle_ctrl_c_for_conversation to status bar for child agent cancellation
- Update rig_request tests for adjusted monitor nudge wording

app/src/ai/blocklist/controller.rs

@@ -2941,10 +2941,7 @@ impl BlocklistAIController {
         ctx: &mut ModelContext<Self>,
     ) {
         self.send_user_query_in_conversation_internal(
-            "The command is still running. Continue monitoring now: call `read_shell_command_output` \
-             with the existing command ID instead of replying with a status message. If the user's \
-             explicit stop condition is met, call `interrupt_shell_command` immediately."
-                .to_owned(),
+            Self::cli_monitor_nudge_message().to_owned(),
             conversation_id,
             None,
             RunningCommandDetection::Detect,
@@ -2956,6 +2953,10 @@ impl BlocklistAIController {
         );
     }
 
+    pub(crate) fn cli_monitor_nudge_message() -> &'static str {
+        "The command is still running. Please check its latest output and keep monitoring it."
+    }
+
     #[allow(clippy::too_many_arguments)]
     fn send_user_query_in_conversation_internal(
         &mut self,