feat(阶段1): 搬入 ojnext 为 apps/web，未改业务代码

apps/web/src/oj/store/code.ts

@@ -0,0 +1,94 @@
+import { defineStore } from "pinia"
+import { STORAGE_KEY } from "utils/constants"
+import storage from "utils/storage"
+import type { Code, LANGUAGE } from "utils/types"
+
+/**
+ * 代码编辑器状态管理 Store
+ * 管理全局的代码、输入、输出状态
+ */
+export const useCodeStore = defineStore("code", () => {
+  // ==================== 状态 ====================
+  const code = reactive<Code>({
+    value: "",
+    language: storage.get(STORAGE_KEY.LANGUAGE) || "Python3",
+  })
+
+  const input = ref("")
+  const output = ref("")
+
+  // ==================== 计算属性 ====================
+  const isEmpty = computed(() => code.value.trim() === "")
+
+  // ==================== 操作 ====================
+  /**
+   * 设置代码内容
+   */
+  function setCode(value: string) {
+    code.value = value
+  }
+
+  /**
+   * 设置编程语言
+   */
+  function setLanguage(language: LANGUAGE) {
+    code.language = language
+    storage.set(STORAGE_KEY.LANGUAGE, language)
+  }
+
+  /**
+   * 设置输入
+   */
+  function setInput(value: string) {
+    input.value = value
+  }
+
+  /**
+   * 设置输出
+   */
+  function setOutput(value: string) {
+    output.value = value
+  }
+
+  /**
+   * 重置所有状态
+   */
+  function reset() {
+    code.value = ""
+    input.value = ""
+    output.value = ""
+  }
+
+  /**
+   * 清空输出
+   */
+  function clearOutput() {
+    output.value = ""
+  }
+
+  // 监听语言变化，保存到本地存储
+  watch(
+    () => code.language,
+    (newLanguage) => {
+      storage.set(STORAGE_KEY.LANGUAGE, newLanguage)
+    },
+  )
+
+  return {
+    // 状态
+    code,
+    input,
+    output,
+
+    // 计算属性
+    isEmpty,
+
+    // 操作
+    setCode,
+    setLanguage,
+    setInput,
+    setOutput,
+    reset,
+    clearOutput,
+  }
+})