fix(app): do not crash when you get a "C" locale

Some linux systems are configured with one of the POSIX default locales,
like "C" or "POSIX", and for some reason this will be returned by
electron's getSystemPreferredLanguages() api directly. Unfortunately,
passing this to the browser js standard Intl.Locale() will make it
throw, and that would whitescreen the app. Instead, catch the error and
treat it as an unmatched system language.

app/src/organisms/Desktop/SystemLanguagePreferenceModal/index.tsx

@@ -83,13 +83,28 @@ export function SystemLanguagePreferenceModal(): JSX.Element | null {
   useEffect(() => {
     if (systemLanguage != null) {
       // prefer match entire locale, then match just language e.g. zh-Hant and zh-CN
-      const matchedSystemLanguageOption =
-        LANGUAGES.find(lng => lng.value === systemLanguage) ??
-        LANGUAGES.find(
-          lng =>
-            new Intl.Locale(lng.value).language ===
-            new Intl.Locale(systemLanguage).language
-        )
+      const matchSystemLanguage: () => string | null = () => {
+        try {
+          return (
+            LANGUAGES.find(lng => lng.value === systemLanguage) ??
+            LANGUAGES.find(
+              lng =>
+                new Intl.Locale(lng.value).language ===
+                new Intl.Locale(systemLanguage).language
+            )
+          )
+        } catch (error: unknown) {
+          // Sometimes the language that we get from the shell will not be something
+          // js i18n can understand. Specifically, some linux systems will have their
+          // locale set to "C" (https://www.gnu.org/software/libc/manual/html_node/Standard-Locales.html)
+          // and that will cause Intl.Locale to throw. In this case, we'll treat it as
+          // unset and fall back to our default.
+          console.log(`Failed to search languages: ${error}`)
+          return null
+        }
+      }
+      const matchedSystemLanguageOption = matchSystemLanguage()
+
       if (matchedSystemLanguageOption != null) {
         // initial current option: set to detected system language
         setCurrentOption(matchedSystemLanguageOption)