Sync nav icons and align leaderboard description with paper abstract.

- Replace 🛡️ with 🏅 for Protected Leaderboard link
- Update INTRODUCTION to open with the paper abstract

src/about.py

@@ -13,7 +13,7 @@ NAVIGATION = """
         <a href="https://huggingface.co/datasets/SorrowTea/PhotoBench" target="_blank" style="text-decoration:none;">
             <span style="display:inline-block; padding:8px 14px; background:#fff; border:1px solid #d4e0c8; border-radius:10px; color:#555; font-size:0.85em; font-weight:500;">📦 Dataset</span>
         </a>
-        <span style="display:inline-block; padding:8px 14px; background:#7CB342; border:1px solid #7CB342; border-radius:10px; color:#fff; font-size:0.85em; font-weight:600;">🛡️ Protected Leaderboard</span>
+        <span style="display:inline-block; padding:8px 14px; background:#7CB342; border:1px solid #7CB342; border-radius:10px; color:#fff; font-size:0.85em; font-weight:600;">🏅 Protected Leaderboard</span>
         <a href="https://huggingface.co/datasets/SorrowTea/PhotoBench-Protected" target="_blank" style="text-decoration:none;">
             <span style="display:inline-block; padding:8px 14px; background:#fff; border:1px solid #d4e0c8; border-radius:10px; color:#555; font-size:0.85em; font-weight:500;">📦 Protected Dataset</span>
         </a>
@@ -42,9 +42,8 @@ TITLE = """
 INTRODUCTION = """
 <div style="text-align:center; max-width:720px; margin:0 auto 40px; color:#444; line-height:1.8;">
 
-<strong>PhotoBench-Protected</strong> is our initial open-source release.
-Because only partial model captions, embeddings, and metadata are provided,
-this benchmark focuses exclusively on <strong>agent planning</strong> ability.
+<strong>PhotoBench</strong> is the first benchmark constructed from authentic, personal albums, designed to shift the paradigm from visual matching to personalized multi-source intent-driven photo retrieval.
+<strong>PhotoBench-Protected</strong> is the limited-information release: only pre-computed captions, embeddings, and metadata are provided, so this leaderboard focuses exclusively on <strong>agent planning</strong> ability.
 
 <p style="margin-top:16px; color:#7CB342; font-weight:600;">
 ⚠️ Please confirm you are submitting to the correct leaderboard.