fix: correct invalid BCP 47 language tag in Jellyseerr components

Fix RangeError caused by invalid locale tags (e.g., zh-CN-US) in
multiple Jellyseerr components. The locale variable already contains
a complete BCP 47 language tag (e.g., zh-CN), so concatenating it
with region (e.g., US) creates an invalid tag.

Changes:
- DetailFacts.tsx: Fix 5 occurrences in date and currency formatting
- JellyseerrSeasons.tsx: Fix 1 occurrence in upcoming air date
- person/[personId].tsx: Fix 1 occurrence in birthday formatting

Total: 3 files, 7 fixes

Closes #1130

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

app/(auth)/(tabs)/(home,libraries,search,favorites)/jellyseerr/person/[personId].tsx

@@ -88,14 +88,11 @@ export default function page() {
           <Text className='opacity-50'>
             {t("jellyseerr.born")}{" "}
             {data?.details?.birthday &&
-              new Date(data.details.birthday).toLocaleDateString(
-                `${locale}-${region}`,
-                {
-                  year: "numeric",
-                  month: "long",
-                  day: "numeric",
-                },
-              )}{" "}
+              new Date(data.details.birthday).toLocaleDateString(locale, {
+                year: "numeric",
+                month: "long",
+                day: "numeric",
+              })}{" "}
             | {data?.details?.placeOfBirth}
           </Text>
         </>

components/jellyseerr/DetailFacts.tsx

@@ -81,10 +81,7 @@ const DetailFacts: React.FC<
   const firstAirDate = useMemo(() => {
     const firstAirDate = (details as TvDetails)?.firstAirDate;
     if (firstAirDate) {
-      return new Date(firstAirDate).toLocaleDateString(
-        `${locale}-${region}`,
-        dateOpts,
-      );
+      return new Date(firstAirDate).toLocaleDateString(locale, dateOpts);
     }
   }, [details]);
 
@@ -92,28 +89,25 @@ const DetailFacts: React.FC<
     const firstAirDate = (details as TvDetails)?.firstAirDate;
     const nextAirDate = (details as TvDetails)?.nextEpisodeToAir?.airDate;
     if (nextAirDate && firstAirDate !== nextAirDate) {
-      return new Date(nextAirDate).toLocaleDateString(
-        `${locale}-${region}`,
-        dateOpts,
-      );
+      return new Date(nextAirDate).toLocaleDateString(locale, dateOpts);
     }
   }, [details]);
 
   const revenue = useMemo(
     () =>
-      (details as MovieDetails)?.revenue?.toLocaleString?.(
-        `${locale}-${region}`,
-        { style: "currency", currency: "USD" },
-      ),
+      (details as MovieDetails)?.revenue?.toLocaleString?.(locale, {
+        style: "currency",
+        currency: "USD",
+      }),
     [details],
   );
 
   const budget = useMemo(
     () =>
-      (details as MovieDetails)?.budget?.toLocaleString?.(
-        `${locale}-${region}`,
-        { style: "currency", currency: "USD" },
-      ),
+      (details as MovieDetails)?.budget?.toLocaleString?.(locale, {
+        style: "currency",
+        currency: "USD",
+      }),
     [details],
   );
 
@@ -171,7 +165,7 @@ const DetailFacts: React.FC<
                 )}
                 <Text>
                   {new Date(r.release_date).toLocaleDateString(
-                    `${locale}-${region}`,
+                    locale,
                     dateOpts,
                   )}
                 </Text>

components/series/JellyseerrSeasons.tsx

@@ -69,7 +69,7 @@ const RenderItem = ({ item }: any) => {
     if (airDate) {
       const airDateObj = new Date(airDate);
       if (new Date() < airDateObj) {
-        return airDateObj.toLocaleDateString(`${locale}-${region}`, dateOpts);
+        return airDateObj.toLocaleDateString(locale, dateOpts);
       }
     }
   }, [item, locale, region]);