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([
+  // Resolve the café first so an unknown slug 404s cleanly instead of doing
-    getCafe(slug),
+  // (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

web/koja/src/components/cafe/cafe-card.tsx

@@ -11,7 +11,8 @@ interface Props {
 export function CafeCard({ cafe, locale, href }: Props) {
   const isFa = locale === "fa";
   const name = isFa ? cafe.name : (cafe.name);
-  const priceTier = cafe.discoverProfile.priceTier;
+  const priceTier = cafe.discoverProfile?.priceTier ?? null;
+  const themes = cafe.discoverProfile?.themes ?? [];
   const priceLabel = priceTier ? (PRICE_TIER_LABELS[priceTier]?.[isFa ? "fa" : "en"] ?? priceTier) : null;
 
   return (
@@ -72,9 +73,9 @@ export function CafeCard({ cafe, locale, href }: Props) {
         )}
 
         {/* Tags */}
-        {cafe.discoverProfile.themes.length > 0 && (
+        {themes.length > 0 && (
           <div className="mt-2 flex flex-wrap gap-1">
-            {cafe.discoverProfile.themes.slice(0, 3).map((tag) => (
+            {themes.slice(0, 3).map((tag) => (
               <span
                 key={tag}
                 className="rounded-full bg-brand-50 px-2 py-0.5 text-[10px] font-medium text-brand-700"

web/koja/src/components/seo/cafe-json-ld.tsx

@@ -46,11 +46,11 @@ export function CafeJsonLd({ cafe, locale, baseUrl }: Props) {
         worstRating: "1",
       },
     } : {}),
-    ...(cafe.discoverProfile.themes.length ? {
+    ...(cafe.discoverProfile?.themes?.length ? {
       servesCuisine: cafe.discoverProfile.themes,
     } : {}),
     priceRange: (() => {
-      const tier = cafe.discoverProfile.priceTier;
+      const tier = cafe.discoverProfile?.priceTier;
       if (tier === "budget") return "﷼";
       if (tier === "moderate") return "﷼﷼";
       if (tier === "upscale") return "﷼﷼﷼";

web/koja/src/i18n/routing.ts

@@ -3,4 +3,7 @@ import { defineRouting } from "next-intl/routing";
 export const routing = defineRouting({
   locales: ["fa", "en"],
   defaultLocale: "fa",
+  // Iran-first: don't pick the locale from the browser's Accept-Language
+  // (Persian users often have an en-US browser). Locale-less URLs default to fa.
+  localeDetection: false,
 });