feat(ui): external dictionary lookup link on the word-check tool

When a checked word is found, show a 'look it up' text link beside the
complaint button that opens an external reference dictionary in a new tab:
gramota.ru for the Russian variants, scrabblewordfinder.org for English
(word lower-cased and percent-encoded). The link hides for a word that is
not found. Inside Telegram it routes through the Mini App SDK's openLink, so
Telegram opens it directly instead of the WebView's 'open this link?'
confirmation; in a browser the anchor's own target=_blank handles it.

Relabel the complaint button to 'Возражаю' (ru); English stays 'Disagree'.

ui/src/lib/telegram.ts

@@ -18,6 +18,7 @@ interface TelegramWebApp {
   expand?: () => void;
   requestFullscreen?: () => void;
   openTelegramLink?: (url: string) => void;
+  openLink?: (url: string) => void;
   onEvent?: (event: string, handler: () => void) => void;
   setHeaderColor?: (color: string) => void;
   setBackgroundColor?: (color: string) => void;
@@ -65,6 +66,20 @@ export function telegramOpenLink(url: string): boolean {
   return true;
 }
 
+/**
+ * telegramOpenExternalLink opens an arbitrary external URL through the Mini App SDK's openLink,
+ * so Telegram opens it directly in its in-app browser instead of the WebView's generic "open
+ * this link?" confirmation that a plain target=_blank navigation triggers. Returns false
+ * outside Telegram or when the SDK lacks the method, so the caller can fall back to a normal
+ * anchor.
+ */
+export function telegramOpenExternalLink(url: string): boolean {
+  const w = webApp();
+  if (!w?.openLink) return false;
+  w.openLink(url);
+  return true;
+}
+
 /**
  * shareTelegramLink opens Telegram's native "share to a chat" picker for url with a
  * caption, through the Mini App SDK (https://t.me/share/url). Returns false outside