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/(tabs)/explore.tsx

@@ -3,6 +3,7 @@ import { CircularRing } from '@/components/CircularRing';
 import { ProgressBar } from '@/components/ProgressBar';
 import { Colors } from '@/constants/Colors';
 import { getTabBarBottomPadding } from '@/constants/TabBar';
+import { useAppSelector } from '@/hooks/redux';
 import { useColorScheme } from '@/hooks/useColorScheme';
 import { getMonthDaysZh, getMonthTitleZh, getTodayIndexInMonth } from '@/utils/date';
 import { ensureHealthPermissions, fetchHealthDataForDate, fetchTodayHealthData } from '@/utils/health';
@@ -23,6 +24,7 @@ import { useSafeAreaInsets } from 'react-native-safe-area-context';
 export default function ExploreScreen() {
   const theme = (useColorScheme() ?? 'light') as 'light' | 'dark';
   const colorTokens = Colors[theme];
+  const stepGoal = useAppSelector((s) => s.user.profile?.dailyStepsGoal) ?? 2000;
   // 使用 dayjs：当月日期与默认选中“今天”
   const days = getMonthDaysZh();
   const [selectedIndex, setSelectedIndex] = useState(getTodayIndexInMonth());
@@ -185,13 +187,13 @@ export default function ExploreScreen() {
                     value={stepCount}
                     resetToken={animToken}
                     style={styles.stepsValue}
-                    format={(v) => `${Math.round(v)}/2000`}
+                    format={(v) => `${Math.round(v)}/${stepGoal}`}
                   />
                 ) : (
-                  <Text style={styles.stepsValue}>——/2000</Text>
+                  <Text style={styles.stepsValue}>——/{stepGoal}</Text>
                 )}
                 <ProgressBar
-                  progress={Math.min(1, Math.max(0, (stepCount ?? 0) / 2000))}
+                  progress={Math.min(1, Math.max(0, (stepCount ?? 0) / stepGoal))}
                   height={18}
                   trackColor="#FFEBCB"
                   fillColor="#FFC365"