Summary: Preply adds "Proven Progress" feature.

Why It Matters: This change shows Preply is focusing on how well students learn. It highlights a new way to show learning works.

What Changed:

• Removed "Log In" link from the top navigation bar.
• Added "Proven Progress" link to the top navigation bar.
• Changed the "Get started" button text to "Find your tutor".
• Updated the main heading from "Find the right tutor for you." to "Progress starts with the right tutor".
• Added a new section with a quote about "97% of learners" and "Preply Efficiency Study".
• Updated the description for "How Preply works" step 1: "motivates, challenges, and inspires you" changed to "motivates, challenges, and supports you — from first lesson to fluency."
• Updated the description for "How Preply works" step 2: "Your tutor will guide the way through your first lesson and help you plan your next steps." changed to "Your tutor will tailor every lesson to your learning goals, so progress feels personal from the very beginning."
• Updated the description for "How Preply works" step 3: "Speak. Read. Write. Repeat." changed to "Make progress every week." and "get ready to reach your goals!" changed to "build lasting confidence, one conversation at a time."
• Added "English, USD" and "Language" and "Currency" labels to the language and currency selectors.
• Updated some tutor counts for specific languages (e.g., Spanish, French, Italian, Chinese, Polish, Urdu, Greek, Turkish, Indonesian, Hindi, Korean).