feat:导出功能重构

frontend/package.json

@@ -26,16 +26,24 @@
     "@vue-flow/minimap": "^1.5.4",
     "@vueuse/core": "^14.0.0",
     "axios": "^1.12.2",
+    "d3": "^7.9.0",
+    "docx-preview": "^0.3.7",
     "dompurify": "^3.3.0",
     "element-plus": "^2.11.5",
     "lodash": "^4.17.21",
     "markdown-it": "^14.1.0",
+    "marked": "^17.0.4",
+    "markmap": "^0.6.1",
+    "markmap-lib": "^0.18.12",
+    "markmap-view": "^0.18.12",
     "pinia": "^3.0.3",
+    "pptxjs": "^0.0.0",
     "qs": "^6.14.0",
     "socket.io-client": "^4.8.3",
     "uuid": "^13.0.0",
     "vue": "^3.5.22",
-    "vue-router": "^4.6.3"
+    "vue-router": "^4.6.3",
+    "xlsx": "^0.18.5"
   },
   "devDependencies": {
     "@tailwindcss/vite": "^4.1.15",