agent fix

controllers/assistantController.go

@@ -56,9 +56,16 @@ type assistantAskRequest struct {
 // built, and this is what finally answers that question at runtime rather than
 // at build time.
 func (ctl *AssistantController) Status(c *fiber.Ctx) error {
+	details := fiber.Map{"available": ctl.assistant.Available()}
+	// Named "reason" rather than "error": not having an assistant is a
+	// deployment choice, and the same field answers "we have not switched it
+	// on" and "somebody misspelled a variable" — which are the two states that
+	// looked identical from outside.
+	if why := ctl.assistant.Unavailable(); why != "" {
+		details["reason"] = why
+	}
 	return c.Status(http.StatusOK).JSON(fiber.Map{
-		"code": http.StatusOK, "status": true, "message": "Success",
-		"details": fiber.Map{"available": ctl.assistant.Available()},
+		"code": http.StatusOK, "status": true, "message": "Success", "details": details,
 	})
 }