fix(koja): default to fa (no browser locale guess); guard null discoverProfile

Koja auto-detected locale from the browser Accept-Language (en for many Persian users); set localeDetection:false so locale-less URLs default to fa. Also guarded cafe.discoverProfile across the cafe page, cafe card, and JSON-LD — a café without a discover profile crashed the page (500). The cafe page now resolves the café first and notFound()s an unknown slug before fetching menu/reviews.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

web/koja/src/app/[locale]/cafe/[slug]/page.tsx

@@ -70,16 +70,29 @@ export default async function CafePage({
   const t = await getTranslations({ locale, namespace: "cafe" });
   const isFa = locale === "fa";
 
-  const [cafe, menu, reviews] = await Promise.all([
-    getCafe(slug),
+  // Resolve the café first so an unknown slug 404s cleanly instead of doing
+  // (and potentially erroring on) the menu/review fetches.
+  const cafe = await getCafe(slug);
+  if (!cafe) notFound();
+
+  const [menu, reviews] = await Promise.all([
     getCafeMenu(slug),
     getCafeReviews(slug),
   ]);
 
-  if (!cafe) notFound();
-
   const name = isFa ? cafe.name : (cafe.nameEn ?? cafe.name);
-  const profile = cafe.discoverProfile;
+  // discoverProfile may be absent for cafés that never filled it in — fall back
+  // to an empty profile so the page renders instead of throwing a 500.
+  const profile = cafe.discoverProfile ?? {
+    themes: [],
+    size: null,
+    floors: null,
+    vibes: [],
+    occasions: [],
+    spaceFeatures: [],
+    noiseLevel: null,
+    priceTier: null,
+  };
   const priceTier = profile.priceTier;
 
   // Similar cafes