docs: audit app architecture and refresh feature documentation

src/components/docs/DocsDocument.tsx

@@ -16,25 +16,28 @@ export function DocsDocument({
   frContent,
 }: DocsDocumentProps): React.JSX.Element {
   const { language, toggleLanguage } = useDocsLanguage();
+  const hasAlternateContent = frContent !== content;
   const translatedContent = language === "fr" ? frContent : content;
 
   return (
     <div className="docs-content">
       <header className="docs-content__header">
         <span>{title}</span>
-        <button
-          className="docs-language-toggle"
-          type="button"
-          onClick={toggleLanguage}
-          aria-label="Changer la langue de la documentation"
-        >
-          <span className={language === "fr" ? "is-active" : undefined}>
-            FR
-          </span>
-          <span className={language === "en" ? "is-active" : undefined}>
-            EN
-          </span>
-        </button>
+        {hasAlternateContent ? (
+          <button
+            className="docs-language-toggle"
+            type="button"
+            onClick={toggleLanguage}
+            aria-label="Changer la langue de la documentation"
+          >
+            <span className={language === "fr" ? "is-active" : undefined}>
+              FR
+            </span>
+            <span className={language === "en" ? "is-active" : undefined}>
+              EN
+            </span>
+          </button>
+        ) : null}
       </header>
 
       <article className="docs-section">