Fix Pi prompt launch (#6857)

bin/omarchy-agent

@@ -88,7 +88,7 @@ omp)
   ;;
 pi)
   command=(pi)
-  [[ -n ${prompt:-} ]] && command+=(-- "$prompt")
+  [[ -n ${prompt:-} ]] && command+=("$prompt")
   ;;
 *)
   echo "Unsupported default agent: $agent" >&2

test/shell.d/default-agent-test.sh

@@ -348,7 +348,7 @@ assert_bypass() {
   assert_launched "$agent" "skips permission prompts" "$@"
 }
 
-assert_launch pi pi -- "Review this project"
+assert_launch pi pi "Review this project"
 assert_launch omp omp --auto-approve -- "Review this project"
 assert_launch opencode opencode --auto --prompt "Review this project"
 assert_launch claude claude --permission-mode bypassPermissions -- "Review this project"