feat: 添加训练计划和打卡功能

- 新增训练计划页面，允许用户制定个性化的训练计划
- 集成打卡功能，用户可以记录每日的训练情况
- 更新 Redux 状态管理，添加训练计划相关的 reducer
- 在首页中添加训练计划卡片，支持用户点击跳转
- 更新样式和布局，以适应新功能的展示和交互
- 添加日期选择器和相关依赖，支持用户选择训练日期

app/auth/login.tsx

@@ -1,6 +1,6 @@
 import { Ionicons } from '@expo/vector-icons';
 import * as AppleAuthentication from 'expo-apple-authentication';
-import { useRouter } from 'expo-router';
+import { useLocalSearchParams, useRouter } from 'expo-router';
 import React, { useCallback, useEffect, useMemo, useState } from 'react';
 import { Alert, Pressable, ScrollView, StyleSheet, Text, TouchableOpacity, View } from 'react-native';
 import { SafeAreaView } from 'react-native-safe-area-context';
@@ -14,6 +14,7 @@ import { login } from '@/store/userSlice';
 
 export default function LoginScreen() {
   const router = useRouter();
+  const searchParams = useLocalSearchParams<{ redirectTo?: string; redirectParams?: string }>();
   const scheme = (useColorScheme() ?? 'light') as 'light' | 'dark';
   const color = Colors[scheme];
   const dispatch = useAppDispatch();
@@ -46,7 +47,18 @@ export default function LoginScreen() {
       });
       const identityToken = (credential as any)?.identityToken;
       await dispatch(login({ appleIdentityToken: identityToken })).unwrap();
-      router.back();
+      // 登录成功后处理重定向
+      const to = searchParams?.redirectTo as string | undefined;
+      const paramsJson = searchParams?.redirectParams as string | undefined;
+      let parsedParams: Record<string, any> | undefined;
+      if (paramsJson) {
+        try { parsedParams = JSON.parse(paramsJson); } catch { }
+      }
+      if (to) {
+        router.replace({ pathname: to, params: parsedParams } as any);
+      } else {
+        router.back();
+      }
     } catch (err: any) {
       if (err?.code === 'ERR_CANCELED') return;
       const message = err?.message || '登录失败，请稍后再试';
@@ -54,12 +66,22 @@ export default function LoginScreen() {
     } finally {
       setLoading(false);
     }
-  }, [appleAvailable, router]);
+  }, [appleAvailable, router, searchParams?.redirectParams, searchParams?.redirectTo]);
 
   const onGuestLogin = useCallback(() => {
-    // TODO: 标记为游客身份，可在此写入本地状态/上报统计
-    router.back();
-  }, [router]);
+    // 游客继续：若有 redirect 则前往，无则返回
+    const to = searchParams?.redirectTo as string | undefined;
+    const paramsJson = searchParams?.redirectParams as string | undefined;
+    let parsedParams: Record<string, any> | undefined;
+    if (paramsJson) {
+      try { parsedParams = JSON.parse(paramsJson); } catch { }
+    }
+    if (to) {
+      router.replace({ pathname: to, params: parsedParams } as any);
+    } else {
+      router.back();
+    }
+  }, [router, searchParams?.redirectParams, searchParams?.redirectTo]);
 
   const disabledStyle = useMemo(() => ({ opacity: hasAgreed ? 1 : 0.5 }), [hasAgreed]);