Replace lande with native language detection (#9974)

Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Co-authored-by: DS Boyce <260543580+ds-boyce@users.noreply.github.com>
Co-authored-by: Eric Bailey <git@esb.lol>

src/view/com/composer/Composer.tsx

@@ -268,6 +268,20 @@ export const ComposePost = ({
     setReplyToLanguages([])
   }
 
+  /**
+   * Timestamp (ms) of the last honored nudge from language detection.
+   * Used to rate-limit the pulse animation: we ignore back-to-back
+   * nudges that arrive within NUDGE_COOLDOWN_MS. Consumers key an effect
+   * on this value — it only changes when we actually want to re-pulse.
+   */
+  const [languageNudgeAt, setLanguageNudgeAt] = useState(0)
+  const onLanguageNudge = () => {
+    const now = Date.now()
+    // ignore back-to-back nudges within 10s; only update state (and
+    // therefore re-pulse) once the cooldown has elapsed
+    setLanguageNudgeAt(prev => (now - prev > 10_000 ? now : prev))
+  }
+
   const [composerState, composerDispatch] = useReducer(
     composerReducer,
     {
@@ -1146,6 +1160,7 @@ export const ComposePost = ({
         replyToLanguages={replyToLanguages}
         currentLanguages={currentLanguages}
         onAcceptSuggestedLanguage={setAcceptedLanguageSuggestion}
+        onNudge={onLanguageNudge}
       />
       <ComposerPills
         isReply={!!replyTo}
@@ -1169,6 +1184,7 @@ export const ComposePost = ({
         }}
         currentLanguages={currentLanguages}
         onSelectLanguage={onSelectLanguage}
+        languageNudgeAt={languageNudgeAt}
         openGallery={openGallery}
         textInputRef={textInputRef}
       />
@@ -1873,6 +1889,7 @@ function ComposerFooter({
   onAddPost,
   currentLanguages,
   onSelectLanguage,
+  languageNudgeAt,
   openGallery,
   textInputRef,
 }: {
@@ -1884,6 +1901,7 @@ function ComposerFooter({
   onAddPost: () => void
   currentLanguages: string[]
   onSelectLanguage?: (language: string) => void
+  languageNudgeAt: number
   openGallery?: boolean
   textInputRef: React.RefObject<TextInputRef | null>
 }) {
@@ -2049,6 +2067,7 @@ function ComposerFooter({
         <PostLanguageSelect
           currentLanguages={currentLanguages}
           onSelectLanguage={onSelectLanguage}
+          nudgeAt={languageNudgeAt}
         />
         <CharProgress
           count={post.shortenedGraphemeLength}