fix: 🧠替换为主站图标 + 图标缩小

static/index.html

@@ -14,7 +14,7 @@
   <a href="https://spdis.space" class="home-link" title="返回主站 spdis.space">
     <img src="/favicon.png" alt="" class="header-icon">
   </a>
-  <h1>🧠 LLM 论文图书馆</h1>
+  <h1><img src="/favicon.png" alt="" class="title-icon"> LLM 论文图书馆</h1>
 </div>
 
 <div class="search-wrap">

static/index_template.html

@@ -14,7 +14,7 @@
   <a href="https://spdis.space" class="home-link" title="返回主站 spdis.space">
     <img src="/favicon.png" alt="" class="header-icon">
   </a>
-  <h1>🧠 LLM 论文图书馆</h1>
+  <h1><img src="/favicon.png" alt="" class="title-icon"> LLM 论文图书馆</h1>
 </div>
 
 <div class="search-wrap">

static/style.css

@@ -28,12 +28,14 @@ body {
 
 .header { text-align: center; margin-bottom: 32px; display: flex; align-items: center; justify-content: center; gap: 10px; }
 .header .home-link { display: inline-flex; align-items: center; }
-.header .header-icon { width: 32px; height: 32px; border-radius: 6px; cursor: pointer; }
+.header .header-icon { width: 22px; height: 22px; border-radius: 4px; cursor: pointer; }
 .header h1 {
   font-size: 1.5em;
   background: linear-gradient(135deg, var(--blue), var(--purple), var(--pink));
   -webkit-background-clip: text; -webkit-text-fill-color: transparent;
+  display: flex; align-items: center; gap: 6px;
 }
+.header .title-icon { width: 24px; height: 24px; border-radius: 4px; flex-shrink: 0; -webkit-background-clip: unset; -webkit-text-fill-color: unset; }
 .header p  { color: var(--text-dim); font-size: 0.85em; margin-top: 4px; }
 
 .grid {