feat: 更新 AI 教练聊天界面和个人信息页面

- 在 AI 教练聊天界面中添加训练记录分析功能，允许用户基于近期训练记录获取分析建议
- 更新 Redux 状态管理，集成每日步数和卡路里目标
- 在个人信息页面中优化用户头像显示，支持从库中选择头像
- 修改首页布局，添加可拖动的教练徽章，提升用户交互体验
- 更新样式以适应新功能的展示和交互

app/ai-coach-chat.tsx

@@ -5,6 +5,7 @@ import React, { useMemo, useRef, useState } from 'react';
 import {
   ActivityIndicator,
   FlatList,
+  Image,
   KeyboardAvoidingView,
   Platform,
   StyleSheet,
@@ -20,6 +21,7 @@ import { HeaderBar } from '@/components/ui/HeaderBar';
 import { Colors } from '@/constants/Colors';
 import { useAppSelector } from '@/hooks/redux';
 import { useColorScheme } from '@/hooks/useColorScheme';
+import type { CheckinRecord } from '@/store/checkinSlice';
 
 type Role = 'user' | 'assistant';
 
@@ -29,6 +31,8 @@ type ChatMessage = {
   content: string;
 };
 
+const COACH_AVATAR = 'https://plates-1251306435.cos.ap-guangzhou.myqcloud.com/images/avatar/imageCoach01.jpeg';
+
 export default function AICoachChatScreen() {
   const router = useRouter();
   const params = useLocalSearchParams<{ name?: string }>();
@@ -47,11 +51,13 @@ export default function AICoachChatScreen() {
   const listRef = useRef<FlatList<ChatMessage>>(null);
 
   const planDraft = useAppSelector((s) => s.trainingPlan?.draft);
+  const checkin = useAppSelector((s) => (s as any).checkin);
 
   const chips = useMemo(() => [
     { key: 'posture', label: '体态评估', action: () => router.push('/ai-posture-assessment') },
     { key: 'plan', label: 'AI制定训练计划', action: () => handleQuickPlan() },
-  ], [router, planDraft]);
+    { key: 'analyze', label: '分析运动记录', action: () => handleAnalyzeRecords() },
+  ], [router, planDraft, checkin]);
 
   function scrollToEnd() {
     requestAnimationFrame(() => {
@@ -109,6 +115,45 @@ export default function AICoachChatScreen() {
     send(prompt);
   }
 
+  function buildTrainingSummary(): string {
+    const entries = Object.values(checkin?.byDate || {}) as CheckinRecord[];
+    if (!entries.length) return '';
+    const recent = entries.sort((a: any, b: any) => String(b.date).localeCompare(String(a.date))).slice(0, 14);
+    let totalSessions = 0;
+    let totalExercises = 0;
+    let totalCompleted = 0;
+    const categoryCount: Record<string, number> = {};
+    const exerciseCount: Record<string, number> = {};
+    for (const rec of recent) {
+      if (!rec?.items?.length) continue;
+      totalSessions += 1;
+      for (const it of rec.items) {
+        totalExercises += 1;
+        if (it.completed) totalCompleted += 1;
+        categoryCount[it.category] = (categoryCount[it.category] || 0) + 1;
+        exerciseCount[it.name] = (exerciseCount[it.name] || 0) + 1;
+      }
+    }
+    const topCategories = Object.entries(categoryCount).sort((a, b) => b[1] - a[1]).slice(0, 3).map(([k, v]) => `${k}×${v}`);
+    const topExercises = Object.entries(exerciseCount).sort((a, b) => b[1] - a[1]).slice(0, 5).map(([k, v]) => `${k}×${v}`);
+    return [
+      `统计周期：最近${recent.length}天（按有记录日计 ${totalSessions} 天）`,
+      `记录条目：${totalExercises}，完成标记：${totalCompleted}`,
+      topCategories.length ? `高频类别：${topCategories.join('，')}` : '',
+      topExercises.length ? `高频动作：${topExercises.join('，')}` : '',
+    ].filter(Boolean).join('\n');
+  }
+
+  function handleAnalyzeRecords() {
+    const summary = buildTrainingSummary();
+    if (!summary) {
+      send('我还没有可分析的打卡记录，请先在“每日打卡”添加并完成一些训练记录，然后帮我分析近期训练表现与改进建议。');
+      return;
+    }
+    const prompt = `请基于以下我的近期训练记录进行分析，输出：1）整体训练负荷与节奏；2）动作与肌群的均衡性（指出偏多/偏少）；3）容易忽视的恢复与热身建议；4）后续一周的优化建议（频次/时长/动作方向）。\n\n${summary}`;
+    send(prompt);
+  }
+
   function renderItem({ item }: { item: ChatMessage }) {
     const isUser = item.role === 'user';
     return (
@@ -118,9 +163,7 @@ export default function AICoachChatScreen() {
         style={[styles.row, { justifyContent: isUser ? 'flex-end' : 'flex-start' }]}
       >
         {!isUser && (
-          <View style={[styles.avatar, { backgroundColor: theme.primary }]}>
-            <Text style={styles.avatarText}>AI</Text>
-          </View>
+          <Image source={{ uri: COACH_AVATAR }} style={styles.avatar} />
         )}
         <View
           style={[
@@ -282,7 +325,7 @@ const styles = StyleSheet.create({
   },
   inputRow: {
     flexDirection: 'row',
-    alignItems: 'flex-end',
+    alignItems: 'center',
     padding: 8,
     borderWidth: 1,
     borderRadius: 16,
@@ -292,8 +335,10 @@ const styles = StyleSheet.create({
     flex: 1,
     fontSize: 15,
     maxHeight: 120,
+    minHeight: 40,
     paddingHorizontal: 8,
     paddingVertical: 6,
+    textAlignVertical: 'center',
   },
   sendBtn: {
     width: 40,