✨ feat: update landing page with logo, arXiv link, and AgentSkills'26 badge

- Replace inline SVG with real SkCC logo (logo.png)
- Add logo above hero banner
- Change badge to AgentSkills'26 Under Review
- Add prominent arXiv paper button in hero actions
- Remove trigger file

Author: ouyangyipeng

website/.trigger

@@ -148,7 +148,7 @@
 <nav id="nav">
   <div class="nav-inner">
     <a href="#" class="nav-logo">
-      <svg viewBox="0 0 100 100"><defs><linearGradient id="g" x1="0%" y1="0%" x2="100%" y2="100%"><stop offset="0%" style="stop-color:#7c3aed"/><stop offset="100%" style="stop-color:#6366f1"/></linearGradient></defs><rect width="100" height="100" rx="22" fill="url(#g)"/><text x="50" y="68" text-anchor="middle" fill="#fff" font-size="48" font-weight="900" font-family="Inter">S</text></svg>
+      <img src="logo.png" alt="SkCC" height="28" width="28" style="border-radius:6px">
       <span>SkCC</span>
     </a>
     <div class="nav-links">
@@ -165,12 +165,14 @@
 <!-- HERO -->
 <section class="hero">
   <div class="hero-content">
-    <div class="hero-badge"><span class="dot"></span> NeurIPS 2026 — Under Review</div>
+    <div style="margin-bottom:1.5rem"><img src="logo.png" alt="SkCC" height="64" width="64" style="border-radius:14px;box-shadow:0 4px 20px rgba(124,58,237,.3)"></div>
+    <div class="hero-badge"><span class="dot"></span> AgentSkill'26 — Under Review</div>
     <h1><span class="gradient-text">Write Once,</span><br>Run Anywhere</h1>
     <p class="hero-subtitle">SkCC is a compiler for LLM agents. Author skills once as SKILL.md, compile to Claude Code, Codex, Gemini CLI & Kimi CLI — with built-in security hardening.</p>
     <div class="hero-actions">
       <a href="#install" class="btn btn-primary">Get Started</a>
       <a href="https://github.com/Nexa-Language/Skill-Compiler" class="btn btn-secondary">View on GitHub</a>
+      <a href="https://arxiv.org/abs/2605.03353" class="btn btn-secondary" target="_blank" style="border-color:rgba(34,211,238,.3);color:#22d3ee">📄 Read Paper (arXiv)</a>
     </div>
     <div class="hero-stats">
       <div class="hero-stat"><div class="hero-stat-value">+13.5<span style="font-size:1rem">pp</span></div><div class="hero-stat-label">Pass Rate Gain</div></div>