Convert pasted web content to Markdown and import remote images

web/package-lock.json

@@ -18,9 +18,11 @@
         "katex": "^0.18.11",
         "mermaid": "^12.2.0",
         "shiki": "^4.5.0",
+        "turndown": "^7.2.4",
         "vue": "^3.5.44"
       },
       "devDependencies": {
+        "@types/turndown": "^5.0.6",
         "@vitejs/plugin-vue": "^6.0.10",
         "commonmark-spec": "^0.31.2",
         "happy-dom": "^21.0.3",
@@ -398,6 +400,12 @@
         "node": ">=22.12.0"
       }
     },
+    "node_modules/@mixmark-io/domino": {
+      "version": "2.2.0",
+      "resolved": "https://registry.npmjs.org/@mixmark-io/domino/-/domino-2.2.0.tgz",
+      "integrity": "sha512-Y28PR25bHXUg88kCV7nivXrP2Nj2RueZ3/l/jdx6J9f8J4nsEGcgX0Qe6lt7Pa+J79+kPiJU3LguR6O/6zrLOw==",
+      "license": "BSD-2-Clause"
+    },
     "node_modules/@oxc-project/types": {
       "version": "0.154.0",
       "resolved": "https://registry.npmjs.org/@oxc-project/types/-/types-0.154.0.tgz",
@@ -1107,6 +1115,13 @@
       "license": "MIT",
       "optional": true
     },
+    "node_modules/@types/turndown": {
+      "version": "5.0.6",
+      "resolved": "https://registry.npmjs.org/@types/turndown/-/turndown-5.0.6.tgz",
+      "integrity": "sha512-ru00MoyeeouE5BX4gRL+6m/BsDfbRayOskWqUvh7CLGW+UXxHQItqALa38kKnOiZPqJrtzJUgAC2+F0rL1S4Pg==",
+      "dev": true,
+      "license": "MIT"
+    },
     "node_modules/@types/unist": {
       "version": "3.0.3",
       "resolved": "https://registry.npmjs.org/@types/unist/-/unist-3.0.3.tgz",
@@ -3099,6 +3114,19 @@
         "node": ">=6.10"
       }
     },
+    "node_modules/turndown": {
+      "version": "7.2.4",
+      "resolved": "https://registry.npmjs.org/turndown/-/turndown-7.2.4.tgz",
+      "integrity": "sha512-I8yFsfRzmzK0WV1pNNOA4A7y4RDfFxPRxb3t+e3ui14qSGOxGtiSP6GjeX+Y6CHb7HYaFj7ECUD7VE5kQMZWGQ==",
+      "license": "MIT",
+      "dependencies": {
+        "@mixmark-io/domino": "^2.2.0"
+      },
+      "engines": {
+        "node": ">=18",
+        "npm": ">=9"
+      }
+    },
     "node_modules/typescript": {
       "version": "6.0.3",
       "resolved": "https://registry.npmjs.org/typescript/-/typescript-6.0.3.tgz",