feat: 添加任务管理和字典管理功能，优化系统配置和代码结构

本次提交主要包含以下变更：
1. 新增任务管理模块，支持定时任务的创建、更新、删除和状态管理
2. 新增字典管理模块，用于维护系统中常用的固定数据
3. 优化系统配置，移除Celery，改用APScheduler进行任务调度
4. 修复部分前端组件的样式问题，统一输入框宽度
5. 更新文档和相关图片资源，完善系统功能描述

这些变更旨在增强系统的可维护性和功能性，提供更灵活的任务调度机制和更便捷的字典数据管理方式。

backend/app/core/redis_crud.py

@@ -0,0 +1,149 @@
+# -*- coding: utf-8 -*-
+
+import pickle
+from typing import Any, Optional
+from aioredis import Redis
+
+from app.core.logger import logger
+
+
+class RedisCURD:
+    """缓存工具类"""
+
+    def __init__(self, redis: Redis):
+        """初始化"""
+        self.redis = redis
+        
+    async def mget(self, *keys: list)-> list:
+        """批量获取缓存
+        
+        Args:
+            *keys: 可变参数,接收多个键名
+            
+        Returns:
+            list: 返回缓存值列表
+        """
+        try:
+            data = await self.redis.mget(keys)
+            return data
+        except Exception as e:
+            logger.error(f"批量获取缓存失败: {str(e)}")
+            return []
+    
+    async def get_keys(self, pattern: str = "*") -> list:
+        """获取缓存键名"""
+        try:
+            keys = await self.redis.keys(f"{pattern}")
+            return keys
+        except Exception as e:
+            logger.error(f"获取缓存键名失败: {str(e)}")
+            return []
+        
+    
+    async def get(self, key: str) -> Any:
+        """获取缓存"""
+        try:
+            data = await self.redis.get(f"{key}")
+            
+            if data is None:
+                return None
+
+            return data
+
+        except Exception as e:
+            logger.error(f"获取缓存失败: {str(e)}")
+            return None
+
+    async def set(self, key: str, value: Any, expire: Optional[int] = None) -> bool:
+        """设置缓存"""
+        try:
+            if expire is None:
+                expire = 300
+                
+            # 根据数据类型选择序列化方式
+            if isinstance(value, (int, float, str)):
+                data = str(value).encode('utf-8')
+            else:
+                try:
+                    data = pickle.dumps(value)
+                except Exception as e:
+                    logger.error(f"序列化数据失败: {str(e)}")
+                    return False
+                    
+            await self.redis.set(
+                name = key,
+                value = data,
+                ex=expire
+            )
+            return True
+            
+        except Exception as e:
+            logger.error(f"设置缓存失败: {str(e)}")
+            return False
+
+    async def delete(self, *keys: str) -> bool:
+        """删除缓存"""
+        try:
+            await self.redis.delete(*keys)
+            return True
+        except Exception as e:
+            logger.error(f"删除缓存失败: {str(e)}")
+            return False
+
+    async def clear(self, pattern: str = "*") -> bool:
+        """清空缓存"""
+        try:
+            keys = await self.redis.keys(f"{pattern}")
+            if keys:
+                await self.redis.delete(*keys)
+            return True
+        except Exception as e:
+            logger.error(f"清空缓存失败: {str(e)}")
+            return False
+
+    async def exists(self, key: str) -> bool:
+        """判断缓存是否存在"""
+        try:
+            return await self.redis.exists(f"{key}")
+        except Exception as e:
+            logger.error(f"判断缓存是否存在失败: {str(e)}")
+            return False
+
+    async def ttl(self, key: str) -> int:
+        """获取缓存过期时间"""
+        try:
+            return await self.redis.ttl(f"{key}")
+        except Exception as e:
+            logger.error(f"获取缓存过期时间失败: {str(e)}")
+            return -1
+
+    async def expire(self, key: str, expire: int) -> bool:
+        """设置缓存过期时间"""
+        try:
+            return await self.redis.expire(f"{key}", expire)
+        except Exception as e:
+            logger.error(f"设置缓存过期时间失败: {str(e)}")
+            return False
+    
+    async def info(self) -> dict:
+        """获取缓存信息"""
+        try:
+            return await self.redis.info()
+        except Exception as e:
+            logger.error(f"获取缓存信息失败: {str(e)}")
+            return {}
+        
+    async def db_size(self) -> int:
+        """获取数据库大小"""
+        try:
+            return await self.redis.dbsize()
+        except Exception as e:
+            logger.error(f"获取数据库大小失败: {str(e)}")
+            return 0
+    async def commandstats(self):
+        """获取命令统计信息"""
+        try:
+            return await self.redis.info("commandstats")
+        except Exception as e:
+            logger.error(f"获取命令统计信息失败: {str(e)}")
+            return {}