feat: 版本号管理、构建日志持久化、App_Store 构建号自动递增

- 新增版本号配置 API（GET/PUT /api/config/versions）和前端管理界面
- 构建日志收集与保存：任务完成/取消/失败时写入 build.log
- 新增任务日志查询接口 GET /api/tasks/{task_id}/log
- App_Store 打包时自动递增 Build_Ver 第四位版本号
- 从 Provisioning Profile 自动提取 TEAM_ID 和 PROVISIONING_NAME
- 前端完成后支持查看完整构建日志

backend/services/log_streamer.py

@@ -2,6 +2,7 @@
 import asyncio
 import json
 from datetime import datetime
+from pathlib import Path
 from typing import Dict, AsyncGenerator
 
 
@@ -11,24 +12,30 @@ class LogStreamer:
     def __init__(self):
         self._queues: Dict[str, asyncio.Queue] = {}
         self._subscribers: Dict[str, list] = {}
+        self._log_lines: Dict[str, list] = {}
 
     def create_queue(self, task_id: str) -> asyncio.Queue:
         """创建任务的日志队列"""
         queue = asyncio.Queue(maxsize=1000)
         self._queues[task_id] = queue
+        self._log_lines[task_id] = []
         return queue
 
     async def emit(self, task_id: str, message: str, level: str = "info"):
         """发送日志消息"""
-        if task_id not in self._queues:
-            return
-
         log_entry = {
             "timestamp": datetime.now().isoformat(),
             "level": level,
             "message": message,
         }
 
+        # 收集日志
+        if task_id in self._log_lines:
+            self._log_lines[task_id].append(log_entry)
+
+        if task_id not in self._queues:
+            return
+
         try:
             self._queues[task_id].put_nowait(log_entry)
         except asyncio.QueueFull:
@@ -81,6 +88,27 @@ class LogStreamer:
         """清理任务日志队列"""
         self._queues.pop(task_id, None)
 
+    def save_log(self, task_id: str, build_dir: Path):
+        """将收集的日志保存到打包目录"""
+        lines = self._log_lines.pop(task_id, None)
+        if not lines:
+            return
+
+        log_path = build_dir / "build.log"
+        with open(log_path, "w", encoding="utf-8") as f:
+            for entry in lines:
+                ts = entry["timestamp"]
+                level = entry["level"].upper()
+                msg = entry["message"]
+                f.write(f"[{ts}] [{level}] {msg}\n")
+
+    def get_log(self, build_dir: Path) -> str:
+        """读取已保存的打包日志"""
+        log_path = build_dir / "build.log"
+        if log_path.exists():
+            return log_path.read_text(encoding="utf-8")
+        return ""
+
 
 # 全局单例
 log_streamer = LogStreamer()