上传前人工裁剪错题区域，OCR 原文排除手写作答。

Co-authored-by: Cursor <cursoragent@cursor.com>

frontend/package-lock.json

@@ -16,6 +16,7 @@
         "echarts-for-react": "^3.0.6",
         "react": "^19.2.7",
         "react-dom": "^19.2.7",
+        "react-easy-crop": "^6.0.2",
         "react-markdown": "^10.1.0",
         "react-router-dom": "^7.18.0",
         "tslib": "^2.8.1"
@@ -3308,6 +3309,12 @@
         "node": "^10 || ^12 || ^13.7 || ^14 || >=15.0.1"
       }
     },
+    "node_modules/normalize-wheel": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/normalize-wheel/-/normalize-wheel-1.0.1.tgz",
+      "integrity": "sha512-1OnlAPZ3zgrk8B91HyRj+eVv+kS5u+Z0SCsak6Xil/kmgEia50ga7zfkumayonZrImffAxPU/5WcyGhzetHNPA==",
+      "license": "BSD-3-Clause"
+    },
     "node_modules/oxlint": {
       "version": "1.71.0",
       "resolved": "https://registry.npmjs.org/oxlint/-/oxlint-1.71.0.tgz",
@@ -3471,6 +3478,19 @@
         "react": "^19.2.7"
       }
     },
+    "node_modules/react-easy-crop": {
+      "version": "6.0.2",
+      "resolved": "https://registry.npmjs.org/react-easy-crop/-/react-easy-crop-6.0.2.tgz",
+      "integrity": "sha512-nY/YiNEuRjc851+/PsOR6Q7XoshmnXMl+oEOsxp3Ah0PrhECi5388jjRnHwsTFx3W0o2zPwvq85oljzUqZNpEw==",
+      "license": "MIT",
+      "dependencies": {
+        "normalize-wheel": "^1.0.1"
+      },
+      "peerDependencies": {
+        "react": ">=16.4.0",
+        "react-dom": ">=16.4.0"
+      }
+    },
     "node_modules/react-is": {
       "version": "18.3.1",
       "resolved": "https://registry.npmjs.org/react-is/-/react-is-18.3.1.tgz",