fix: use .catch() instead of .default() for period validation in checkout (#3972)

.default() only applies when value is undefined, but .catch() handles
any invalid value (e.g. 'monthly/' with trailing slash from Safari URL
handling) by falling back to 'monthly'.

Co-authored-by: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
Co-authored-by: yujonglee <yujonglee.dev@gmail.com>

Author: devin-ai-integration[bot]

apps/web/src/routes/_view/app/checkout.tsx

@@ -11,7 +11,7 @@ const VALID_SCHEMES = [
 ] as const;
 
 const validateSearch = z.object({
-  period: z.enum(["monthly", "yearly"]).default("monthly"),
+  period: z.enum(["monthly", "yearly"]).catch("monthly"),
   scheme: z.enum(VALID_SCHEMES).optional(),
 });