feat: 添加日记系统

- 完整的 Django 后端 (diary app)
- 前端页面
- 部署脚本 (本地 + 云端)
- Nginx 配置
- 数据迁移工具
- 同步工具

diary-system/backend/diary/models.py

@@ -0,0 +1,66 @@
+from django.db import models
+from django.utils import timezone
+
+class DiaryEntry(models.Model):
+    """日记条目"""
+    date = models.DateField('日期', unique=True)
+    title = models.CharField('标题', max_length=200, default='每日日记')
+    completed_tasks = models.TextField('完成的任务', blank=True, default='')
+    learned = models.TextField('学到的东西', blank=True, default='')
+    problems = models.TextField('遇到的问题和解决方案', blank=True, default='')
+    reflections = models.TextField('想法和反思', blank=True, default='')
+    improvements = models.TextField('进步点', blank=True, default='')
+    plans = models.TextField('明日计划', blank=True, default='')
+    created_at = models.DateTimeField('创建时间', auto_now_add=True)
+    updated_at = models.DateTimeField('更新时间', auto_now=True)
+
+    class Meta:
+        ordering = ['-date']
+        verbose_name = '日记'
+        verbose_name_plural = '日记'
+
+    def __str__(self):
+        return f"{self.date} - {self.title}"
+
+
+class Experience(models.Model):
+    """经验总结 - 记录遇到的问题和解决方法"""
+    title = models.CharField('标题', max_length=200)
+    category = models.CharField('类别', max_length=50, choices=[
+        ('deployment', '📦 部署'),
+        ('development', '💻 开发'),
+        ('database', '🗄️ 数据库'),
+        ('permission', '🔐 权限'),
+        ('network', '🌐 网络'),
+        ('other', '其他'),
+    ])
+    problem = models.TextField('问题描述')
+    solution = models.TextField('解决方案')
+    lesson_learned = models.TextField('经验教训', blank=True, default='')
+    date = models.DateField('日期', auto_now_add=True)
+    created_at = models.DateTimeField('创建时间', auto_now_add=True)
+
+    class Meta:
+        ordering = ['-date', '-created_at']
+        verbose_name = '经验总结'
+        verbose_name_plural = '经验总结'
+
+    def __str__(self):
+        return f"{self.category} - {self.title}"
+
+
+class DailyProgress(models.Model):
+    """每日进度追踪"""
+    entry = models.ForeignKey(DiaryEntry, on_delete=models.CASCADE, related_name='progresses')
+    category = models.CharField('类别', max_length=50)
+    description = models.TextField('描述')
+    progress_percent = models.IntegerField('进度百分比', default=0)
+    created_at = models.DateTimeField('创建时间', auto_now_add=True)
+
+    class Meta:
+        ordering = ['-created_at']
+        verbose_name = '进度'
+        verbose_name_plural = '进度'
+
+    def __str__(self):
+        return f"{self.entry.date} - {self.category}: {self.progress_percent}%"