feat: 图片点击放大支持 (medium-zoom)

docs/.vitepress/theme/index.ts

@@ -0,0 +1,18 @@
+import DefaultTheme from "vitepress/theme";
+import mediumZoom from "medium-zoom";
+import { onMounted, watch, nextTick } from "vue";
+import { useRoute } from "vitepress";
+
+import "./zoom.css";
+
+export default {
+  extends: DefaultTheme,
+  setup() {
+    const route = useRoute();
+    const initZoom = () => {
+      mediumZoom(".main img", { background: "var(--vp-c-bg)" });
+    };
+    onMounted(() => initZoom());
+    watch(() => route.path, () => nextTick(() => initZoom()));
+  },
+};