🌐 Localized Language Names

The source and target language dropdowns no longer rely on a static English name table:

• Option labels are resolved with Intl.DisplayNames in the visitor’s UI language — the same option reads “Japanese” on the English site and 「日语」 on the Chinese site.
• Google-specific codes (zh-CN, zh-TW, tl) are mapped to their BCP-47 equivalents (zh-Hans, zh-Hant, fil) before lookup.
• Intl.DisplayNames instances are cached per locale, and codes missing from CLDR fall back to the built-in English names.

⏱️ Request Timeouts & Clearer Failure Guidance

A hung request no longer stalls a relay:

• Every request now has a hard 10-second timeout (AbortSignal.timeout); timeouts are treated as retryable errors with their own localized message.
• The Google dictionary endpoint’s retry budget was trimmed from 3 to 2 attempts, bounding the worst-case wait per round.
• When a provider fails, the status bar now appends a hint: switch the engine and press Continue to resume from the failed round.

🛡️ MyMemory Error Handling

MyMemory reports business-level failures (exhausted quota, invalid language pairs) inside an HTTP 200 body via its responseStatus field:

• Responses are now only accepted when responseStatus is 200.
• Business failures surface as a localized “Translation service returned an error (HTTP {status})” message; responseDetails is logged for debugging.

🧭 Route Expansion Fixes

• The final round’s card expands exactly when the relay finishes — no longer while it is still running.
• Rounds you manually collapsed stay collapsed.

📱 Mobile Layout Polish

• Long status messages wrap with break-words instead of overflowing.
• Share actions reflow into a grid on small screens with consistent alignment.
• Tighter padding and type scale across the form, history entries, and route stop cards.

🗣️ Localization

• Provider selection, resume, timeout and MyMemory error strings are translated across all seven locales: English, 简体中文, 繁體中文, العربية, Bahasa Indonesia, Bahasa Melayu, and Português (BR).