Add fullscreen minimap context and adjust minimum height in Viewer component

wiki/.vitepress/theme/components/Viewer.vue

@@ -128,6 +128,7 @@ const isFullscreen = ref(false)
 
 // 小地图相关
 let minimapCtx = null
+let fullscreenMinimapCtx = null
 let minimapAnimationFrameId = null
 const minimapStyle = ref({
   width: '150px',
@@ -567,7 +568,7 @@ const renderMinimap = () => {
   // 根据当前模式选择对应的小地图 canvas 和 ref
   const canvas = isFullscreen.value ? fullscreenMinimapCanvasRef.value : minimapCanvasRef.value
   const minimap = isFullscreen.value ? fullscreenMinimapRef.value : minimapRef.value
-  const ctx = minimapCtx
+  const ctx = isFullscreen.value ? fullscreenMinimapCtx : minimapCtx
 
   if (!ctx || !canvas || !minimap) return
 
@@ -912,14 +913,20 @@ const toggleFullscreen = () => {
           fullscreenCtx.setTransform(1, 0, 0, 1, 0, 0)
           fullscreenCtx.scale(dpr, dpr)
         }
+      }
+
+      // 初始化全屏小地图 canvas
+      if (fullscreenMinimapCanvasRef.value) {
+        fullscreenMinimapCtx = fullscreenMinimapCanvasRef.value.getContext('2d')
+      }
 
       document.body.style.overflow = 'hidden'
-      }
     } else {
       // 退出全屏：恢复正常模式
       document.body.style.overflow = ''
       // 清理全屏 context
       fullscreenCtx = null
+      fullscreenMinimapCtx = null
     }
 
     // 重新渲染
@@ -982,6 +989,7 @@ onUnmounted(() => {
   ctx = null
   fullscreenCtx = null
   minimapCtx = null
+  fullscreenMinimapCtx = null
 })
 </script>
 
@@ -995,7 +1003,7 @@ onUnmounted(() => {
   position: relative;
   width: 100%;
   height: 100%;
-  min-height: 400px;
+  min-height: 200px;
   overflow: hidden;
   background: var(--vp-c-bg-soft);
   border: 1px solid var(--vp-c-border);