fix(exam): 扩展选项字母支持范围从A-D到A-Z

- 修复E选项及更多选项显示带前缀问题
- 更新所有选项相关正则表达式

frontend/package-lock.json

@@ -7,6 +7,7 @@
     "": {
       "name": "kaopeilian-frontend",
       "version": "1.0.0",
+      "hasInstallScript": true,
       "dependencies": {
         "@coze/api": "^1.3.7",
         "@element-plus/icons-vue": "^2.3.1",
@@ -1056,129 +1057,6 @@
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       }
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@@ -2989,32 +2867,6 @@
         "url": "https://github.com/chalk/ansi-styles?sponsor=1"
       }
     },
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-      "dev": true,
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     "node_modules/argparse": {
       "version": "2.0.1",
       "resolved": "https://registry.npmjs.org/argparse/-/argparse-2.0.1.tgz",
@@ -3281,24 +3133,6 @@
       ],
       "license": "CC-BY-4.0"
     },
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-      "license": "MIT",
-      "optional": true,
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-      "dependencies": {
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-    },
     "node_modules/chai": {
       "version": "4.5.0",
       "resolved": "https://registry.npmjs.org/chai/-/chai-4.5.0.tgz",
@@ -3364,18 +3198,6 @@
         "url": "https://paulmillr.com/funding/"
       }
     },
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@@ -3474,18 +3296,6 @@
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@@ -3564,15 +3374,6 @@
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@@ -3852,21 +3653,6 @@
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@@ -3906,15 +3692,6 @@
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@@ -4903,36 +4680,6 @@
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@@ -4964,65 +4711,6 @@
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@@ -5243,15 +4931,6 @@
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@@ -6197,21 +5876,6 @@
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@@ -6238,52 +5902,6 @@
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@@ -6327,15 +5945,6 @@
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-      "resolved": "https://registry.npmmirror.com/nan/-/nan-2.23.1.tgz",
-      "integrity": "sha512-r7bBUGKzlqk8oPBDYxt6Z0aEdF1G1rwlMcLk8LCOMbOzf0mG+JUfUzG4fIMWwHWP0iyaLWEQZJmtB7nOHEm/qw==",
-      "dev": true,
-      "license": "MIT",
-      "optional": true,
-      "peer": true
-    },
     "node_modules/nanoid": {
       "version": "3.3.11",
       "resolved": "https://registry.npmjs.org/nanoid/-/nanoid-3.3.11.tgz",
@@ -6594,22 +6203,6 @@
         "url": "https://github.com/sponsors/sindresorhus"
       }
     },
-    "node_modules/npmlog": {
-      "version": "5.0.1",
-      "resolved": "https://registry.npmmirror.com/npmlog/-/npmlog-5.0.1.tgz",
-      "integrity": "sha512-AqZtDUWOMKs1G/8lwylVjrdYgqA4d9nu8hc+0gzRxlDb1I10+FHBGMXs6aiQHFdCUUlqH99MUMuLfzWDNDtfxw==",
-      "deprecated": "This package is no longer supported.",
-      "dev": true,
-      "license": "ISC",
-      "optional": true,
-      "peer": true,
-      "dependencies": {
-        "are-we-there-yet": "^2.0.0",
-        "console-control-strings": "^1.1.0",
-        "gauge": "^3.0.0",
-        "set-blocking": "^2.0.0"
-      }
-    },
     "node_modules/nth-check": {
       "version": "2.1.1",
       "resolved": "https://registry.npmjs.org/nth-check/-/nth-check-2.1.1.tgz",
@@ -6630,18 +6223,6 @@
       "dev": true,
       "license": "MIT"
     },
-    "node_modules/object-assign": {
-      "version": "4.1.1",
-      "resolved": "https://registry.npmmirror.com/object-assign/-/object-assign-4.1.1.tgz",
-      "integrity": "sha512-rJgTQnkUnH1sFw8yT6VSU3zD3sWmu6sZhIseY8VX+GRu3P6F7Fu+JNDoXfklElbLJSnc3FUQHVe4cU5hj+BcUg==",
-      "dev": true,
-      "license": "MIT",
-      "optional": true,
-      "peer": true,
-      "engines": {
-        "node": ">=0.10.0"
-      }
-    },
     "node_modules/once": {
       "version": "1.4.0",
       "resolved": "https://registry.npmjs.org/once/-/once-1.4.0.tgz",
@@ -7586,23 +7167,6 @@
       "dev": true,
       "license": "MIT"
     },
-    "node_modules/readable-stream": {
-      "version": "3.6.2",
-      "resolved": "https://registry.npmmirror.com/readable-stream/-/readable-stream-3.6.2.tgz",
-      "integrity": "sha512-9u/sniCrY3D5WdsERHzHE4G2YCXqoG5FTHUiCC4SIbr6XcLZBY05ya9EKjYek9O5xOAwjGq+1JdGBAS7Q9ScoA==",
-      "dev": true,
-      "license": "MIT",
-      "optional": true,
-      "peer": true,
-      "dependencies": {
-        "inherits": "^2.0.3",
-        "string_decoder": "^1.1.1",
-        "util-deprecate": "^1.0.1"
-      },
-      "engines": {
-        "node": ">= 6"
-      }
-    },
     "node_modules/readdirp": {
       "version": "4.1.2",
       "resolved": "https://registry.npmjs.org/readdirp/-/readdirp-4.1.2.tgz",
@@ -7930,15 +7494,6 @@
         "node": ">=10"
       }
     },
-    "node_modules/set-blocking": {
-      "version": "2.0.0",
-      "resolved": "https://registry.npmmirror.com/set-blocking/-/set-blocking-2.0.0.tgz",
-      "integrity": "sha512-KiKBS8AnWGEyLzofFfmvKwpdPzqiy16LvQfK3yv/fVH7Bj13/wl3JSR1J+rfgRE9q7xUJK4qvgS8raSOeLUehw==",
-      "dev": true,
-      "license": "ISC",
-      "optional": true,
-      "peer": true
-    },
     "node_modules/shebang-command": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/shebang-command/-/shebang-command-2.0.0.tgz",
@@ -7982,43 +7537,6 @@
         "url": "https://github.com/sponsors/isaacs"
       }
     },
-    "node_modules/simple-concat": {
-      "version": "1.0.1",
-      "resolved": "https://registry.npmmirror.com/simple-concat/-/simple-concat-1.0.1.tgz",
-      "integrity": "sha512-cSFtAPtRhljv69IK0hTVZQ+OfE9nePi/rtJmw5UjHeVyVroEqJXP1sFztKUy1qU+xvz3u/sfYJLa947b7nAN2Q==",
-      "dev": true,
-      "funding": [
-        {
-          "type": "github",
-          "url": "https://github.com/sponsors/feross"
-        },
-        {
-          "type": "patreon",
-          "url": "https://www.patreon.com/feross"
-        },
-        {
-          "type": "consulting",
-          "url": "https://feross.org/support"
-        }
-      ],
-      "license": "MIT",
-      "optional": true,
-      "peer": true
-    },
-    "node_modules/simple-get": {
-      "version": "3.1.1",
-      "resolved": "https://registry.npmmirror.com/simple-get/-/simple-get-3.1.1.tgz",
-      "integrity": "sha512-CQ5LTKGfCpvE1K0n2us+kuMPbk/q0EKl82s4aheV9oXjFEz6W/Y7oQFVJuU6QG77hRT4Ghb5RURteF5vnWjupA==",
-      "dev": true,
-      "license": "MIT",
-      "optional": true,
-      "peer": true,
-      "dependencies": {
-        "decompress-response": "^4.2.0",
-        "once": "^1.3.1",
-        "simple-concat": "^1.0.0"
-      }
-    },
     "node_modules/sirv": {
       "version": "2.0.4",
       "resolved": "https://registry.npmjs.org/sirv/-/sirv-2.0.4.tgz",
@@ -8098,18 +7616,6 @@
       "dev": true,
       "license": "MIT"
     },
-    "node_modules/string_decoder": {
-      "version": "1.3.0",
-      "resolved": "https://registry.npmmirror.com/string_decoder/-/string_decoder-1.3.0.tgz",
-      "integrity": "sha512-hkRX8U1WjJFd8LsDJ2yQ/wWWxaopEsABU1XfkM8A+j0+85JAGppt16cr1Whg6KIbb4okU6Mql6BOj+uup/wKeA==",
-      "dev": true,
-      "license": "MIT",
-      "optional": true,
-      "peer": true,
-      "dependencies": {
-        "safe-buffer": "~5.2.0"
-      }
-    },
     "node_modules/string-width": {
       "version": "5.1.2",
       "resolved": "https://registry.npmjs.org/string-width/-/string-width-5.1.2.tgz",
@@ -8335,38 +7841,6 @@
         "url": "https://opencollective.com/synckit"
       }
     },
-    "node_modules/tar": {
-      "version": "6.2.1",
-      "resolved": "https://registry.npmmirror.com/tar/-/tar-6.2.1.tgz",
-      "integrity": "sha512-DZ4yORTwrbTj/7MZYq2w+/ZFdI6OZ/f9SFHR+71gIVUZhOQPHzVCLpvRnPgyaMpfWxxk/4ONva3GQSyNIKRv6A==",
-      "dev": true,
-      "license": "ISC",
-      "optional": true,
-      "peer": true,
-      "dependencies": {
-        "chownr": "^2.0.0",
-        "fs-minipass": "^2.0.0",
-        "minipass": "^5.0.0",
-        "minizlib": "^2.1.1",
-        "mkdirp": "^1.0.3",
-        "yallist": "^4.0.0"
-      },
-      "engines": {
-        "node": ">=10"
-      }
-    },
-    "node_modules/tar/node_modules/minipass": {
-      "version": "5.0.0",
-      "resolved": "https://registry.npmmirror.com/minipass/-/minipass-5.0.0.tgz",
-      "integrity": "sha512-3FnjYuehv9k6ovOEbyOswadCDPX1piCfhV8ncmYtHOjuPwylVWsghTLo7rabjC3Rx5xD4HDx8Wm1xnMF7S5qFQ==",
-      "dev": true,
-      "license": "ISC",
-      "optional": true,
-      "peer": true,
-      "engines": {
-        "node": ">=8"
-      }
-    },
     "node_modules/terser": {
       "version": "5.44.0",
       "resolved": "https://registry.npmjs.org/terser/-/terser-5.44.0.tgz",
@@ -9172,44 +8646,6 @@
         "node": ">=8"
       }
     },
-    "node_modules/wide-align": {
-      "version": "1.1.5",
-      "resolved": "https://registry.npmmirror.com/wide-align/-/wide-align-1.1.5.tgz",
-      "integrity": "sha512-eDMORYaPNZ4sQIuuYPDHdQvf4gyCF9rEEV/yPxGfwPkRodwEgiMUUXTx/dex+Me0wxx53S+NgUHaP7y3MGlDmg==",
-      "dev": true,
-      "license": "ISC",
-      "optional": true,
-      "peer": true,
-      "dependencies": {
-        "string-width": "^1.0.2 || 2 || 3 || 4"
-      }
-    },
-    "node_modules/wide-align/node_modules/emoji-regex": {
-      "version": "8.0.0",
-      "resolved": "https://registry.npmmirror.com/emoji-regex/-/emoji-regex-8.0.0.tgz",
-      "integrity": "sha512-MSjYzcWNOA0ewAHpz0MxpYFvwg6yjy1NG3xteoqz644VCo/RPgnr1/GGt+ic3iJTzQ8Eu3TdM14SawnVUmGE6A==",
-      "dev": true,
-      "license": "MIT",
-      "optional": true,
-      "peer": true
-    },
-    "node_modules/wide-align/node_modules/string-width": {
-      "version": "4.2.3",
-      "resolved": "https://registry.npmmirror.com/string-width/-/string-width-4.2.3.tgz",
-      "integrity": "sha512-wKyQRQpjJ0sIp62ErSZdGsjMJWsap5oRNihHhu6G7JVO/9jIB6UyevL+tXuOqrng8j/cxKTWyWUwvSTriiZz/g==",
-      "dev": true,
-      "license": "MIT",
-      "optional": true,
-      "peer": true,
-      "dependencies": {
-        "emoji-regex": "^8.0.0",
-        "is-fullwidth-code-point": "^3.0.0",
-        "strip-ansi": "^6.0.1"
-      },
-      "engines": {
-        "node": ">=8"
-      }
-    },
     "node_modules/word-wrap": {
       "version": "1.2.5",
       "resolved": "https://registry.npmjs.org/word-wrap/-/word-wrap-1.2.5.tgz",
@@ -9376,15 +8812,6 @@
         "node": ">=10"
       }
     },
-    "node_modules/yallist": {
-      "version": "4.0.0",
-      "resolved": "https://registry.npmmirror.com/yallist/-/yallist-4.0.0.tgz",
-      "integrity": "sha512-3wdGidZyq5PB084XLES5TpOSRA3wjXAlIWMhum2kRcv/41Sn2emQ0dycQW4uZXLejwKvg6EsvbdlVL+FYEct7A==",
-      "dev": true,
-      "license": "ISC",
-      "optional": true,
-      "peer": true
-    },
     "node_modules/yargs": {
       "version": "17.7.2",
       "resolved": "https://registry.npmjs.org/yargs/-/yargs-17.7.2.tgz",

frontend/src/views/exam/practice.vue

@@ -349,21 +349,21 @@ const transformDifyQuestions = (difyQuestions: any[]): any[] => {
       // 更精确地提取正确答案字母（避免误提取选项内容中的字母）
       let correctLetters: string[] = []
       
-      // 情况1：纯选项字母格式（如 "A", "B", "A,B", "A、B", "A,B,C"）
+      // 情况1：纯选项字母格式（如 "A", "B", "A,B", "A、B", "A,B,C,D,E"）
-      const pureLetterMatch = correctAnswerStr.match(/^[A-Da-d]([,、\s]+[A-Da-d])*$/)
+      const pureLetterMatch = correctAnswerStr.match(/^[A-Za-z]([,、\s]+[A-Za-z])*$/)
       if (pureLetterMatch) {
-        correctLetters = correctAnswerStr.match(/[A-Da-d]/g)?.map(l => l.toUpperCase()) || []
+        correctLetters = correctAnswerStr.match(/[A-Za-z]/g)?.map(l => l.toUpperCase()) || []
         console.log(`   ✓ 匹配情况1(纯字母): correctLetters=[${correctLetters.join(',')}]`)
       } else {
         // 情况2：多选项带内容格式（如 "A：分组列,B：聚合函数,C：常量"）
         // 匹配所有 "X：" 或 "X:" 格式，提取字母
-        const multiOptionMatch = correctAnswerStr.match(/[A-Da-d](?=[：:])/g)
+        const multiOptionMatch = correctAnswerStr.match(/[A-Za-z](?=[：:])/g)
         if (multiOptionMatch && multiOptionMatch.length > 0) {
           correctLetters = multiOptionMatch.map(l => l.toUpperCase())
           console.log(`   ✓ 匹配情况2(多选项带内容): correctLetters=[${correctLetters.join(',')}]`)
         } else {
           // 情况3：只有开头字母（如 "A" 后面直接跟非字母内容）
-          const firstLetterMatch = correctAnswerStr.match(/^([A-Da-d])(?![A-Za-z])/)
+          const firstLetterMatch = correctAnswerStr.match(/^([A-Za-z])(?![A-Za-z])/)
           if (firstLetterMatch) {
             correctLetters = [firstLetterMatch[1].toUpperCase()]
             console.log(`   ✓ 匹配情况3(开头字母): correctLetters=[${correctLetters.join(',')}]`)
@@ -410,8 +410,8 @@ const transformDifyQuestions = (difyQuestions: any[]): any[] => {
         
         // 提取选项内容（去掉 "A：" 或 "A:" 前缀）
         let content = optStr
-        // 匹配 "A：xxx" 或 "A:xxx" 格式（支持中英文冒号）
+        // 匹配 "A：xxx" 或 "A:xxx" 格式（支持中英文冒号，支持A-Z所有字母）
-        const contentPrefixMatch = optStr.match(/^[A-Da-d]\s*[：:]\s*(.*)$/)
+        const contentPrefixMatch = optStr.match(/^[A-Za-z]\s*[：:]\s*(.*)$/)
         if (contentPrefixMatch) {
           content = contentPrefixMatch[1].trim()
         }
@@ -422,13 +422,13 @@ const transformDifyQuestions = (difyQuestions: any[]): any[] => {
         let letterSource = ''
         
         // 1. 尝试从选项内容前缀提取（如 "A：xxx" 或 "A:xxx"）
-        const prefixMatch = optStr.match(/^([A-Da-d])\s*[：:]/)
+        const prefixMatch = optStr.match(/^([A-Za-z])\s*[：:]/)
         if (prefixMatch) {
           optionLetter = prefixMatch[1].toUpperCase()
           letterSource = '内容前缀'
         }
-        // 2. 尝试从 key 提取（如果 key 是单个字母 A-D）
+        // 2. 尝试从 key 提取（如果 key 是单个字母 A-Z）
-        else if (key.match(/^[A-Da-d]$/)) {
+        else if (key.match(/^[A-Za-z]$/)) {
           optionLetter = key.toUpperCase()
           letterSource = 'key字母'
         }