promote(uat): GRO-2014 profile-summary error-handling fix (dev→uat) (#138)

src/routes/pets.ts

@@ -23,6 +23,23 @@ import {
 
 export const petsRouter = new Hono<AppEnv>();
 
+// Convert Zod validation errors from 422 to 400 and ensure any thrown error
+// returns a structured JSON body rather than Hono's default empty-body 500.
+// GRO-2014: profile-summary previously bubbled unhandled errors and produced
+// an empty-body 500. Mirror the onError pattern already used in invoices.ts
+// and reports.ts so every error has a JSON envelope.
+petsRouter.onError((err, c) => {
+  if (err instanceof z.ZodError) {
+    return c.json({ error: "Validation failed", issues: err.issues }, 400);
+  }
+  console.error("[pets] unhandled error", err);
+  return c.json({ error: "Internal Server Error" }, 500);
+});
+
+// UUID format used by all pet routes — guards path params against malformed
+// values before they hit Drizzle / Postgres uuid columns (which would throw).
+const uuidSchema = z.string().uuid();
+
 const createPetSchema = z.object({
   clientId: z.string().uuid(),
   name: z.string().min(1).max(200),
@@ -112,8 +129,24 @@ petsRouter.get("/:id", async (c) => {
 petsRouter.get("/:id/profile-summary", async (c) => {
   const db = getDb();
   const petId = c.req.param("id");
+
+  // GRO-2014: validate UUID format before hitting Postgres. Passing a non-UUID
+  // string to a uuid column makes the driver throw, which previously surfaced
+  // as an empty-body 500 to clients.
+  const parsedId = uuidSchema.safeParse(petId);
+  if (!parsedId.success) {
+    return c.json({ error: "Not found" }, 404);
+  }
+
+  // Defense in depth: resolveStaffMiddleware should always populate `staff`
+  // for protected routes (or short-circuit with 401/403 of its own). Guard
+  // anyway so a misconfigured route mount can't trigger a TypeError on
+  // staffRow.id when the linkage check runs.
   const staffRow = c.get("staff");
-  const isGroomer = staffRow?.role === "groomer";
+  if (!staffRow) {
+    return c.json({ error: "Unauthorized" }, 401);
+  }
+  const isGroomer = staffRow.role === "groomer";
 
   // Fetch the pet
   const [pet] = await db.select().from(pets).where(eq(pets.id, petId));