feat: 完善 Mermaid 配置与预览缩放

package-lock.json

@@ -39,9 +39,10 @@
       "version": "0.1.0",
       "dependencies": {
         "@md-to-pdf/core": "0.1.0",
+        "@mermaid-js/layout-elk": "0.2.2",
         "highlight.js": "^11.11.1",
         "katex": "^0.16.28",
-        "mermaid": "^11.12.3",
+        "mermaid": "11.16.0",
         "pagedjs": "^0.4.3",
         "pdfjs-dist": "6.1.200",
         "react": "^19.2.0",
@@ -1145,6 +1146,19 @@
         }
       }
     },
+    "node_modules/@mermaid-js/layout-elk": {
+      "version": "0.2.2",
+      "resolved": "https://registry.npmjs.org/@mermaid-js/layout-elk/-/layout-elk-0.2.2.tgz",
+      "integrity": "sha512-vnH3gtqfhyBiRVKNpT8iDENTw18q/OF0GF/SfYfHN43KZpu+6eZDEOMHTfNYAkpmUWJNgtRQFIS6BTc7vH/DYQ==",
+      "license": "MIT",
+      "dependencies": {
+        "d3": "^7.9.0",
+        "elkjs": "^0.9.3"
+      },
+      "peerDependencies": {
+        "mermaid": "^11.0.2"
+      }
+    },
     "node_modules/@mermaid-js/parser": {
       "version": "1.2.0",
       "resolved": "https://registry.npmjs.org/@mermaid-js/parser/-/parser-1.2.0.tgz",
@@ -3333,6 +3347,12 @@
       "dev": true,
       "license": "ISC"
     },
+    "node_modules/elkjs": {
+      "version": "0.9.3",
+      "resolved": "https://registry.npmjs.org/elkjs/-/elkjs-0.9.3.tgz",
+      "integrity": "sha512-f/ZeWvW/BCXbhGEf1Ujp29EASo/lk1FDnETgNKwJrsVvGZhUWCZyg3xLJjAsxfOmt8KjswHmI5EwCQcPMpOYhQ==",
+      "license": "EPL-2.0"
+    },
     "node_modules/emoji-regex": {
       "version": "8.0.0",
       "resolved": "https://registry.npmjs.org/emoji-regex/-/emoji-regex-8.0.0.tgz",