feat: 更新训练计划和今日训练页面

- 在训练计划中添加了新的类型定义，优化了排课功能
- 修改了今日训练页面的布局，提升用户体验
- 删除了不再使用的排课相关文件，简化代码结构
- 更新了 Redux 状态管理，确保数据处理的准确性和稳定性

app/workout/today.tsx

@@ -403,7 +403,7 @@ export default function TodayWorkoutScreen() {
 
   if (!currentSession) {
     return (
-      <SafeAreaView style={styles.safeArea}>
+      <View style={styles.safeArea}>
         <HeaderBar title="今日训练" onBack={() => router.back()} />
         <View style={styles.emptyContainer}>
           <Ionicons name="calendar-outline" size={64} color="#9CA3AF" />
@@ -416,7 +416,7 @@ export default function TodayWorkoutScreen() {
             <Text style={styles.createPlanBtnText}>去创建训练计划</Text>
           </TouchableOpacity>
         </View>
-      </SafeAreaView>
+      </View>
     );
   }
 
@@ -447,58 +447,61 @@ export default function TodayWorkoutScreen() {
 
         <View style={styles.content}>
           {/* 训练计划信息头部 */}
-          <View style={[styles.planHeader, { backgroundColor: `${goalConfig.color}20` }]}>
-            {/* 删除按钮 - 右上角 */}
-            <TouchableOpacity
-              style={styles.deleteBtn}
-              onPress={handleDeleteSession}
-              disabled={loading}
-            >
-              <Ionicons name="trash-outline" size={18} color="#EF4444" />
-            </TouchableOpacity>
+          <TouchableOpacity onPress={() => router.push(`/training-plan`)}>
+            <View style={[styles.planHeader, { backgroundColor: `${goalConfig.color}20` }]}>
 
-            <View style={[styles.planColorIndicator, { backgroundColor: goalConfig.color }]} />
-            <View style={styles.planInfo}>
-              <ThemedText style={styles.planTitle}>{goalConfig.title}</ThemedText>
-              <ThemedText style={styles.planDescription}>
-                {currentSession.trainingPlan?.name || '今日训练'}
-              </ThemedText>
-              {/* 进度统计文字 */}
-              {currentSession.status !== 'planned' && (
-                <Text style={styles.planProgressStats}>
-                  {workoutStats.completed}/{workoutStats.total} 个动作已完成
-                </Text>
-              )}
-            </View>
-
-            {/* 右侧区域：圆环进度或开始按钮 */}
-            {currentSession.status === 'planned' ? (
+              {/* 删除按钮 - 右上角 */}
               <TouchableOpacity
-                style={[styles.planStartBtn, { backgroundColor: goalConfig.color }]}
-                onPress={handleStartWorkout}
+                style={styles.deleteBtn}
+                onPress={handleDeleteSession}
                 disabled={loading}
               >
-                <Ionicons name="play" size={20} color="#FFFFFF" />
+                <Ionicons name="trash-outline" size={18} color="#EF4444" />
               </TouchableOpacity>
-            ) : (
-              <View style={styles.circularProgressContainer}>
-                <CircularRing
-                  size={60}
-                  strokeWidth={6}
-                  trackColor={`${goalConfig.color}20`}
-                  progressColor={goalConfig.color}
-                  progress={completionPercentage / 100}
-                  showCenterText={false}
-                  durationMs={800}
-                />
-                <View style={styles.circularProgressText}>
-                  <Text style={[styles.circularProgressPercentage, { color: goalConfig.color }]}>
-                    {completionPercentage}%
+
+              <View style={[styles.planColorIndicator, { backgroundColor: goalConfig.color }]} />
+              <View style={styles.planInfo}>
+                <ThemedText style={styles.planTitle}>{goalConfig.title}</ThemedText>
+                <ThemedText style={styles.planDescription}>
+                  {currentSession.trainingPlan?.name || '今日训练'}
+                </ThemedText>
+                {/* 进度统计文字 */}
+                {currentSession.status !== 'planned' && (
+                  <Text style={styles.planProgressStats}>
+                    {workoutStats.completed}/{workoutStats.total} 个动作已完成
                   </Text>
-                </View>
+                )}
               </View>
-            )}
-          </View>
+
+              {/* 右侧区域：圆环进度或开始按钮 */}
+              {currentSession.status === 'planned' ? (
+                <TouchableOpacity
+                  style={[styles.planStartBtn, { backgroundColor: goalConfig.color }]}
+                  onPress={handleStartWorkout}
+                  disabled={loading}
+                >
+                  <Ionicons name="play" size={20} color="#FFFFFF" />
+                </TouchableOpacity>
+              ) : (
+                <View style={styles.circularProgressContainer}>
+                  <CircularRing
+                    size={60}
+                    strokeWidth={6}
+                    trackColor={`${goalConfig.color}20`}
+                    progressColor={goalConfig.color}
+                    progress={completionPercentage / 100}
+                    showCenterText={false}
+                    durationMs={800}
+                  />
+                  <View style={styles.circularProgressText}>
+                    <Text style={[styles.circularProgressPercentage, { color: goalConfig.color }]}>
+                      {completionPercentage}%
+                    </Text>
+                  </View>
+                </View>
+              )}
+            </View>
+          </TouchableOpacity>
 
           {/* 训练完成提示 */}
           {currentSession.status === 'completed' && (
@@ -924,7 +927,8 @@ const styles = StyleSheet.create({
   emptyContainer: {
     flex: 1,
     alignItems: 'center',
-    justifyContent: 'center',
+    justifyContent: 'flex-start',
+    paddingTop: 40,
     padding: 20,
   },
   emptyTitle: {