update：训练难度展示ui完成

src/mock/trainingDifficulty.js

@@ -0,0 +1,113 @@
+// 难度页当前用于保存“开始训练前上下文”的本地存储 key。
+export const trainingDifficultyStorageKey = "training-selection";
+
+// 当前是页面联调用的模拟数据：
+// 1. 总难度 20 级
+// 2. 已解锁到 Lv3
+// 3. 前三关展示不同完成进度
+const totalDifficultyLevel = 20;
+const mockedUnlockedDifficultyId = "lv3";
+const mockedDifficultyProgressMap = {
+  lv1: 100,
+  lv2: 90,
+  lv3: 70,
+};
+
+const modeList = [
+  {
+    key: "endurance",
+    title: "耐力训练",
+  },
+  {
+    key: "precision",
+    title: "精准训练",
+  },
+  {
+    key: "rhythm",
+    title: "节奏训练",
+  },
+  {
+    key: "basic",
+    title: "基础训练",
+  },
+  {
+    key: "power",
+    title: "力量训练",
+  },
+  {
+    key: "focus",
+    title: "专注训练",
+  },
+];
+
+const createDifficultyId = (level) => `lv${level}`;
+
+const createDifficultyLabel = (level) => `Lv${level}`;
+
+// 根据等级生成模拟文案，方便一次性扩展到更多关卡。
+const createDifficultySummary = (level) => {
+  return [
+    `箭靶划分为${Math.min(1 + Math.floor((level - 1) / 5), 4)}个区域`,
+    `需${4 + level}次命中目标`,
+    `${100 + Math.floor((level - 1) / 2) * 10}秒内完成所有射击`,
+    "需使用20CM全环靶",
+  ];
+};
+
+// 难度页的节点位置已经在页面内统一计算，
+// 这里保留最核心的 id / label 即可，不再维护无效的 left / top / style 字段。
+const createDifficultyNode = (level) => {
+  return {
+    id: createDifficultyId(level),
+    label: createDifficultyLabel(level),
+  };
+};
+
+const createDifficultyDetail = (level) => {
+  const id = createDifficultyId(level);
+  const label = createDifficultyLabel(level);
+
+  return {
+    id,
+    label,
+    title: `${label}难度`,
+    summary: createDifficultySummary(level),
+    startText: "开始",
+    targetPaperType: "20CM全环靶",
+  };
+};
+
+// 所有训练模式当前共用同一套难度定义。
+const sharedDifficultyNodes = Array.from(
+  { length: totalDifficultyLevel },
+  (_, index) => createDifficultyNode(index + 1)
+);
+
+const sharedDifficultyDetails = Object.fromEntries(
+  Array.from({ length: totalDifficultyLevel }, (_, index) => {
+    const detail = createDifficultyDetail(index + 1);
+    return [detail.id, detail];
+  })
+);
+
+const createModeConfig = ({ key, title, reward = null }) => {
+  return {
+    key,
+    title,
+    nodes: sharedDifficultyNodes,
+    details: sharedDifficultyDetails,
+    activeDifficultyId: mockedUnlockedDifficultyId,
+    progressMap: mockedDifficultyProgressMap,
+    reward,
+  };
+};
+
+// 难度页数据源入口：
+// 页面通过 getTrainingDifficultyModeConfig(modeKey) 获取当前模式完整配置。
+export const trainingDifficultyModeMap = Object.fromEntries(
+  modeList.map((mode) => [mode.key, createModeConfig(mode)])
+);
+
+export const getTrainingDifficultyModeConfig = (modeKey) => {
+  return trainingDifficultyModeMap[modeKey] || trainingDifficultyModeMap.precision;
+};