feat(家庭成员): 添加家庭成员模型并关联感悟和计划

添加家庭成员模型(FamilyMember)并关联到感悟记录(InsightRecord)和今日计划(TodayPlan)
修改相关表单、视图和模板以支持发言人功能
添加数据库迁移文件和初始化脚本
更新报告模板显示发言人信息

core/models.py

@@ -71,6 +71,20 @@ class PlanType(models.Model):
     def __str__(self):
         return self.name
 
+class FamilyMember(models.Model):
+    """家庭成员"""
+    name = models.CharField(max_length=20, unique=True, verbose_name="姓名")
+    created_at = models.DateTimeField(auto_now_add=True, verbose_name="创建时间")
+    updated_at = models.DateTimeField(auto_now=True, verbose_name="更新时间")
+    
+    class Meta:
+        verbose_name = "家庭成员"
+        verbose_name_plural = "家庭成员"
+        ordering = ['name']
+    
+    def __str__(self):
+        return self.name
+
 class ReadingRecord(models.Model):
     """阅读记录表"""
     date = models.DateField(default=timezone.now, verbose_name="日期")
@@ -95,6 +109,7 @@ class InsightRecord(models.Model):
     """感悟记录表"""
     date = models.DateField(default=timezone.now, verbose_name="日期")
     content = models.TextField(verbose_name="内容")
+    speaker = models.ForeignKey(FamilyMember, on_delete=models.CASCADE, verbose_name="发言人")
     file = models.FileField(upload_to='insight_files/', blank=True, null=True, verbose_name="上传文件")
     created_at = models.DateTimeField(auto_now_add=True, verbose_name="创建时间")
     updated_at = models.DateTimeField(auto_now=True, verbose_name="更新时间")
@@ -129,6 +144,7 @@ class TodayPlan(models.Model):
     """今日计划表"""
     date = models.DateField(default=timezone.now, verbose_name="日期")
     content = models.TextField(verbose_name="内容")
+    speaker = models.ForeignKey(FamilyMember, on_delete=models.SET_NULL, null=True, blank=True, verbose_name="发言人")
     priority = models.ForeignKey(Priority, on_delete=models.CASCADE, default=2, verbose_name="优先级")
     type = models.ForeignKey(PlanType, on_delete=models.CASCADE, default=4, verbose_name="类型")
     status = models.ForeignKey(Status, on_delete=models.CASCADE, default=1, verbose_name="状态")