feat: add Pi adapter support to constants and onboarding UI

ui/src/components/OnboardingWizard.tsx

@@ -53,6 +53,7 @@ type AdapterType =
   | "claude_local"
   | "codex_local"
   | "opencode_local"
+  | "pi_local"
   | "cursor"
   | "process"
   | "http"
@@ -665,6 +666,12 @@ export function OnboardingWizard() {
                           icon: OpenCodeLogoIcon,
                           desc: "Local multi-provider agent"
                         },
+                        {
+                          value: "pi_local" as const,
+                          label: "Pi",
+                          icon: Terminal,
+                          desc: "Local Pi agent"
+                        },
                         {
                           value: "openclaw" as const,
                           label: "OpenClaw",
@@ -741,6 +748,7 @@ export function OnboardingWizard() {
                   {(adapterType === "claude_local" ||
                     adapterType === "codex_local" ||
                     adapterType === "opencode_local" ||
+                    adapterType === "pi_local" ||
                     adapterType === "cursor") && (
                     <div className="space-y-3">
                       <div>