fix(cli): correct session show rich output Session Summary panel field labels and fields

Reviewed and APPROVED. Closes #3040.

features/session_cli.feature

@@ -45,6 +45,14 @@ Feature: Session CLI commands
     When I run session CLI show with a valid session ID
     Then the session CLI show should succeed
     And the session CLI output should contain "Session Summary"
+    And the session CLI output should contain "ID:"
+    And the session CLI output should contain "Actor:"
+    And the session CLI output should contain "Messages:"
+    And the session CLI output should contain "Created:"
+    And the session CLI output should contain "Updated:"
+    And the session CLI output should contain "Automation:"
+    And the session CLI output should not contain "Session ID:"
+    And the session CLI output should not contain "Namespace:"
 
   Scenario: Show session with JSON format
     Given there is a mocked session with messages

features/steps/session_cli_steps.py

@@ -490,6 +490,13 @@ def step_output_contains(context: Context, text: str) -> None:
     )
 
 
+@then('the session CLI output should not contain "{text}"')
+def step_output_not_contains(context: Context, text: str) -> None:
+    assert text not in context.result.output, (
+        f"Expected '{text}' NOT in output, but it was found:\n{context.result.output}"
+    )
+
+
 @then("the session CLI output should be valid JSON")
 def step_output_valid_json(context: Context) -> None:
     try:

src/cleveragents/cli/commands/session.py

@@ -370,16 +370,16 @@ def show(
             typer.echo(format_output(dict(data), fmt))
             return
 
-        # Session summary panel — spec-compliant field labels
+        # Session summary panel — field order per spec: ID, Actor, Messages,
+        # Created, Updated, Automation (docs/specification.md §agents session show)
         details = (
             f"[bold]ID:[/bold] {session.session_id}\n"
             f"[bold]Actor:[/bold] {session.actor_name or '(none)'}\n"
             f"[bold]Messages:[/bold] {session.message_count}\n"
             f"[bold]Created:[/bold] {session.created_at.strftime('%Y-%m-%d %H:%M')}\n"
-            f"[bold]Updated:[/bold] {session.updated_at.strftime('%Y-%m-%d %H:%M')}"
+            f"[bold]Updated:[/bold] {session.updated_at.strftime('%Y-%m-%d %H:%M')}\n"
+            f"[bold]Automation:[/bold] {session.automation or '(none)'}"
         )
-        if session.automation is not None:
-            details += f"\n[bold]Automation:[/bold] {session.automation}"
         console.print(Panel(details, title="Session Summary", expand=False))
 
         # Recent messages