Address delegate review feedback

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
Copilot-Session: 8b0a2b53-dbbe-4b64-b09b-6c5b6d5e084a

Author: DDKinger

src/cascadia/TerminalSettingsEditor/Resources/qps-ploc/Resources.resw

@@ -1253,7 +1253,7 @@
   </data>
   <data name="Profile_CommandPaletteAgent.HelpText" xml:space="preserve">
     <value>Choose the agent used for command palette delegation in this profile. This selection takes precedence over the global delegate agent setting.</value>
-    <comment>{Locked=qps-ploc,qps-ploca,qps-plocm} Description for the per-profile command palette agent setting.</comment>
+    <comment>Description for the per-profile command palette agent setting.</comment>
   </data>
   <data name="Profile_AgentPaneBackend_AgentFormat" xml:space="preserve">
     <value>{0} · {1}</value>

src/cascadia/TerminalSettingsEditor/Resources/qps-ploca/Resources.resw

@@ -1253,7 +1253,7 @@
   </data>
   <data name="Profile_CommandPaletteAgent.HelpText" xml:space="preserve">
     <value>Choose the agent used for command palette delegation in this profile. This selection takes precedence over the global delegate agent setting.</value>
-    <comment>{Locked=qps-ploc,qps-ploca,qps-plocm} Description for the per-profile command palette agent setting.</comment>
+    <comment>Description for the per-profile command palette agent setting.</comment>
   </data>
   <data name="Profile_AgentPaneBackend_AgentFormat" xml:space="preserve">
     <value>{0} · {1}</value>

src/cascadia/TerminalSettingsEditor/Resources/qps-plocm/Resources.resw

@@ -1253,7 +1253,7 @@
   </data>
   <data name="Profile_CommandPaletteAgent.HelpText" xml:space="preserve">
     <value>Choose the agent used for command palette delegation in this profile. This selection takes precedence over the global delegate agent setting.</value>
-    <comment>{Locked=qps-ploc,qps-ploca,qps-plocm} Description for the per-profile command palette agent setting.</comment>
+    <comment>Description for the per-profile command palette agent setting.</comment>
   </data>
   <data name="Profile_AgentPaneBackend_AgentFormat" xml:space="preserve">
     <value>{0} · {1}</value>

tools/wta/src/main.rs

@@ -2330,7 +2330,7 @@ async fn delegate_with_context(
             .filter(|command| !command.is_empty())
             .is_none()
     {
-        anyhow::bail!("no command palette agent configured");
+        anyhow::bail!("--delegate-agent is required when --delegate-source is supplied");
     }
     let delegate_agents = crate::coordinator::default_delegate_agent_runtimes(
         delegate_agent_cmd,