Fixed issue where clicking "Kontakt" in German mode showed English contact form.
Changes:
- Re-apply translations when modal opens (ensures current language is used)
- Use translated "submitting" text for sending state (DE: "Senden...", FR: "Envoi en cours...")
- Use translated submit button text when re-enabled
- Remove duplicate success message text
Now clicking "Kontakt" in DE mode or "Nous contacter" in FR mode correctly shows the modal in that language.
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Co-Authored-By: Claude <noreply@anthropic.com>
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