feat: 新增 Mermaid 圖表功能的選項，支持在新標籤頁中打開和縮放平移互動

fix: 更新插件版本以修正相容性問題
refactor: 優化代碼結構，提升可讀性

source/css/_layout/third-party.styl

@@ -70,46 +70,49 @@ if hexo-config('mermaid.enable')
     background: var(--card-bg)
     text-align: center
 
-    .mermaid-open-btn
-      position: absolute
-      top: 8px
-      right: 8px
-      z-index: 2
-      display: flex
-      justify-content: center
-      align-items: center
-      padding: 0
-      width: 34px
-      height: 25px
-      border: none
-      border-radius: 20%
-      background: #D3D3D3
-      box-shadow: 0 4px 10px rgba(0, 0, 0, .15)
-      color: #fff
-      font-size: 0
-      line-height: 1
-      cursor: pointer
-      transition: background .2s ease, transform .2s ease
-
-      i
-        font-size: 16px
+    if hexo-config('mermaid.open_in_new_tab')
+      .mermaid-open-btn
+        position: absolute
+        top: 8px
+        right: 8px
+        z-index: 2
+        display: flex
+        justify-content: center
+        align-items: center
+        padding: 0
+        width: 34px
+        height: 25px
+        border: none
+        border-radius: 20%
+        background: #D3D3D3
+        box-shadow: 0 4px 10px rgba(0, 0, 0, .15)
+        color: #fff
+        font-size: 0
         line-height: 1
+        cursor: pointer
+        transition: background .2s ease, transform .2s ease
 
-      &:hover,
-      &:focus-visible
-        outline: none
-        background: #C0C0C0
-        transform: translateY(-1px)
+        i
+          font-size: 16px
+          line-height: 1
+
+        &:hover,
+        &:focus-visible
+          outline: none
+          background: #C0C0C0
+          transform: translateY(-1px)
 
     & > svg
       max-width: 100%
       height: 100%
-      cursor: grab
-      user-select: none
-      touch-action: none
 
-      &:active
-        cursor: grabbing
+      if hexo-config('mermaid.zoom_pan')
+        cursor: grab
+        user-select: none
+        touch-action: none
+
+        &:active
+          cursor: grabbing
 
   if hexo-config('mermaid.code_write')
     pre > code.mermaid