Reapply "feat: 设备端应用商店（平台侧）"

This reverts commit bf5071b14d.

web/__init__.py

@@ -10,6 +10,7 @@
   apks        — 应用管理
   tailscale   — Tailscale 管理
   system      — 系统数据备份导出/导入
+  device_agent— 设备端 Agent 专用接口（应用商店：清单/下载/上报）+ 其管理端配置
 """
 from flask import Blueprint
 
@@ -28,6 +29,8 @@ def register_blueprints(app):
     from .agent_api import bp as agent_bp
     _agent_mod.set_app(app)
     from .system_api import bp as system_bp
+    from .device_agent_api import bp as devagent_bp
     for bp in (auth_bp, monitor_bp, tasks_bp, admin_bp, tools_bp,
-               devices_bp, apks_bp, tailscale_bp, agent_bp, system_bp):
+               devices_bp, apks_bp, tailscale_bp, agent_bp, system_bp,
+               devagent_bp):
         app.register_blueprint(bp)