Added a new App product page (available at /app-prod and /app-prod/{locale}) that shows localized titles, descriptions, and SEO metadata for each language.

Updated the AI tool’s pricing and plan descriptions with new wording in 42 languages.
Refreshed shared page layout and navigation for a clearer, more intuitive experience.
Pages now output proper <html lang> and dir attributes based on the selected language, improving multilingual rendering, right‑to‑left support, and SEO.
Image extraction now includes a fallback routine, allowing images to be retrieved from PDFs that previously caused errors.
Layer extraction now continues processing remaining layers even if one layer fails, preventing a single error from stopping the whole operation.

Flatten operation now returns a clear error message instead of crashing when all files fail.
Abstract page generation now falls back to the original PDF if an error occurs, ensuring the process completes.
Fixed login issues on www subdomains and eliminated the need for a second login attempt.
Resolved login issues across subdomains, ensuring seamless access.
Fixed language handling so the correct locale is always displayed.

Localized App Page and Multilingual Improvements