feat: 添加多语言代码片段定义（Java/Python/Go/JavaScript）

Author: CC11001100

src/utils/codeSnippets.ts

@@ -0,0 +1,119 @@
+import type { CodeLanguage } from '../types'
+
+export interface CodeSnippet {
+  language: CodeLanguage
+  code: string
+  // 将通用行号映射到该语言的行号
+  lineMapping: Record<number, number>
+}
+
+// 通用行号定义（用于步骤生成器）
+export const LINE_NUMBERS = {
+  FUNCTION_START: 1,
+  CREATE_MAP: 2,
+  FOR_LOOP: 3,
+  CALC_COMPLEMENT: 4,
+  CHECK_MAP: 5,
+  RETURN_RESULT: 6,
+  END_IF: 7,
+  PUT_MAP: 8,
+  END_FOR: 9,
+  RETURN_EMPTY: 10,
+  FUNCTION_END: 11,
+}
+
+export const CODE_SNIPPETS: Record<CodeLanguage, CodeSnippet> = {
+  java: {
+    language: 'java',
+    code: `public int[] twoSum(int[] nums, int target) {
+    Map<Integer, Integer> map = new HashMap<>();
+    for (int i = 0; i < nums.length; i++) {
+        int complement = target - nums[i];
+        if (map.containsKey(complement)) {
+            return new int[] { map.get(complement), i };
+        }
+        map.put(nums[i], i);
+    }
+    return new int[] {};
+}`,
+    lineMapping: {
+      1: 1, 2: 2, 3: 3, 4: 4, 5: 5, 6: 6, 7: 7, 8: 8, 9: 9, 10: 10, 11: 11,
+    },
+  },
+  python: {
+    language: 'python',
+    code: `def twoSum(nums: List[int], target: int) -> List[int]:
+    hash_map = {}
+    for i, num in enumerate(nums):
+        complement = target - num
+        if complement in hash_map:
+            return [hash_map[complement], i]
+        hash_map[num] = i
+    return []`,
+    lineMapping: {
+      1: 1, 2: 2, 3: 3, 4: 4, 5: 5, 6: 6, 7: 7, 8: 7, 9: 8, 10: 8, 11: 8,
+    },
+  },
+  golang: {
+    language: 'golang',
+    code: `func twoSum(nums []int, target int) []int {
+    hashMap := make(map[int]int)
+    for i, num := range nums {
+        complement := target - num
+        if j, ok := hashMap[complement]; ok {
+            return []int{j, i}
+        }
+        hashMap[num] = i
+    }
+    return []int{}
+}`,
+    lineMapping: {
+      1: 1, 2: 2, 3: 3, 4: 4, 5: 5, 6: 6, 7: 7, 8: 8, 9: 9, 10: 10, 11: 11,
+    },
+  },
+  javascript: {
+    language: 'javascript',
+    code: `function twoSum(nums, target) {
+    const map = new Map();
+    for (let i = 0; i < nums.length; i++) {
+        const complement = target - nums[i];
+        if (map.has(complement)) {
+            return [map.get(complement), i];
+        }
+        map.set(nums[i], i);
+    }
+    return [];
+}`,
+    lineMapping: {
+      1: 1, 2: 2, 3: 3, 4: 4, 5: 5, 6: 6, 7: 7, 8: 8, 9: 9, 10: 10, 11: 11,
+    },
+  },
+}
+
+export const LANGUAGE_LABELS: Record<CodeLanguage, string> = {
+  java: 'Java',
+  python: 'Python',
+  golang: 'Go',
+  javascript: 'JavaScript',
+}
+
+export const LANGUAGE_ICONS: Record<CodeLanguage, string> = {
+  java: '☕',
+  python: '🐍',
+  golang: '🐹',
+  javascript: '📜',
+}
+
+/**
+ * 获取指定语言的代码
+ */
+export function getCodeForLanguage(language: CodeLanguage): string {
+  return CODE_SNIPPETS[language].code
+}
+
+/**
+ * 将通用行号转换为指定语言的行号
+ */
+export function mapLineToLanguage(genericLine: number, language: CodeLanguage): number {
+  return CODE_SNIPPETS[language].lineMapping[genericLine] || genericLine
+}