fix: reject executable pi configuration

backend/src/pi/management.ts

@@ -7,6 +7,10 @@ import {
   type Settings,
 } from "../settings/settings-store.js";
 import type { PiModel } from "./list-models.js";
+import {
+  PI_MANAGED_CONFIG_ERROR_MESSAGE,
+  isPiManagedConfigError,
+} from "./managed-config.js";
 import { createPiProviderSmoke, type PiProviderSmoke } from "./provider-smoke.js";
 
 const execFile = promisify(nodeExecFile);
@@ -105,7 +109,10 @@ export function createPiManagement(config: AppConfig, deps: PiManagementDeps): P
     let listed: PiModel[];
     try {
       listed = await deps.listModels();
-    } catch {
+    } catch (error) {
+      if (isPiManagedConfigError(error)) {
+        throw new PiManagementError("pi_management_unavailable", PI_MANAGED_CONFIG_ERROR_MESSAGE);
+      }
       throw new PiManagementError("pi_management_unavailable", "Pi model choices are unavailable");
     }
     const models: Array<{ provider: string; id: string }> = [];
@@ -287,6 +294,7 @@ function isTimeout(error: unknown): boolean {
 }
 
 function stableMessage(error: unknown, fallback: string): string {
+  if (isPiManagedConfigError(error)) return PI_MANAGED_CONFIG_ERROR_MESSAGE;
   return error instanceof PiManagementError ? error.message : fallback;
 }