任务管理页面后端优化：提升进度更新频率和状态详细程度

1. 提高爬取阶段进度更新频率：从每10个改为每5个代理更新一次
2. 提高验证阶段进度更新频率：从每5个改为每验证1个代理就更新一次
3. 添加进度百分比计算所需字段：在progress消息中添加current和total字段
4. 增强状态信息详细程度：
   - 添加connecting状态：正在连接插件源
   - 添加starting状态：正在启动爬虫
   - 添加crawling_start状态：开始爬取代理
   - 添加validating_start状态：开始验证代理
   - 在进度消息中添加message字段，显示更详细的进度描述

这些改进可以让前端显示更实时、更详细的任务进度和状态信息

tasks_manager.py

@@ -22,6 +22,7 @@ class TasksManager:
             'current_url': None,
             'plugins': []
         }
+        self.estimated_total = 1000
 
     def set_callbacks(self, progress_callback: Optional[Callable] = None, status_callback: Optional[Callable] = None):
         self.progress_callback = progress_callback
@@ -34,6 +35,10 @@ class TasksManager:
             if 'found' in data and 'verified' in data:
                 data['success_rate'] = round((data['verified'] / data['found'] * 100), 2) if data['found'] > 0 else 0
             
+            if 'found' in data:
+                data['current'] = data['found'] + self.stats['total_verified']
+                data['total'] = self.estimated_total
+            
             await self.progress_callback(data)
 
     async def _notify_status(self, status: str, message: str):
@@ -45,7 +50,7 @@ class TasksManager:
             })
 
     async def run_crawler(self):
-        await self._notify_status('crawling', '开始爬取代理啦~')
+        await self._notify_status('crawling_start', '开始爬取代理啦~')
         manager = PluginManager()
         
         count = 0
@@ -59,11 +64,13 @@ class TasksManager:
             count += 1
             self.stats['total_found'] = count
             
-            if count % 10 == 0:
+            if count % 5 == 0:
                 await self._notify_progress({
                     'type': 'crawling',
                     'found': count,
-                    'verified': self.stats['total_verified']
+                    'verified': self.stats['total_verified'],
+                    'current_proxy': f"{ip}:{port}",
+                    'message': f'正在爬取：已发现 {count} 个代理'
                 })
         
         if self.stop_requested:
@@ -73,7 +80,7 @@ class TasksManager:
         logger.info(f"爬虫抓取阶段完成，共发现 {count} 个潜在代理。")
 
     async def run_validator(self, db: SQLiteManager, validator: ProxyValidator):
-        await self._notify_status('validating', '开始验证代理啦~')
+        await self._notify_status('validating_start', '开始验证代理啦~')
         verified_count = 0
         
         while True:
@@ -91,13 +98,13 @@ class TasksManager:
                     verified_count += 1
                     self.stats['total_verified'] = verified_count
                     
-                    if verified_count % 5 == 0:
-                        await self._notify_progress({
-                            'type': 'validating',
-                            'found': self.stats['total_found'],
-                            'verified': verified_count,
-                            'current_proxy': f"{ip}:{port}"
-                        })
+                    await self._notify_progress({
+                        'type': 'validating',
+                        'found': self.stats['total_found'],
+                        'verified': verified_count,
+                        'current_proxy': f"{ip}:{port}",
+                        'message': f'正在验证：已验证 {verified_count} 个代理'
+                    })
                 else:
                     logger.info(f"验证失败: {ip}:{port} ({protocol})")
             except Exception as e:
@@ -126,6 +133,8 @@ class TasksManager:
             'plugins': []
         }
         
+        await self._notify_status('connecting', '正在连接插件源...')
+        await self._notify_status('starting', '正在启动爬虫...')
         await self._notify_status('running', '任务开始啦~')
         
         async with ProxyValidator(max_concurrency=200) as validator: