在 MiGu 侧落地日志定时清理与磁盘空间告警。

系统配置可开关清理策略；日志管理页支持查看/保存清理选项。

Co-authored-by: Cursor <cursoragent@cursor.com>

MiGu.Server/Controllers/ConfigController.cs

@@ -2,6 +2,7 @@
 using Microsoft.AspNetCore.Authorization;
 using Microsoft.AspNetCore.Mvc;
 using MiGu.Server.Configs;
+using MiGu.Server.Logs;
 
 namespace MiGu.Server.Controllers;
 
@@ -13,10 +14,12 @@ namespace MiGu.Server.Controllers;
 public class ConfigController : ControllerBase
 {
     private readonly ConfigStore _store;
+    private readonly LogCleanupService _cleanup;
 
-    public ConfigController(ConfigStore store)
+    public ConfigController(ConfigStore store, LogCleanupService cleanup)
     {
         _store = store;
+        _cleanup = cleanup;
     }
 
     [HttpGet]
@@ -66,6 +69,8 @@ public class ConfigController : ControllerBase
         }
 
         var env = _store.Put(section, payload);
+        if (string.Equals(section, "system", StringComparison.OrdinalIgnoreCase))
+            _cleanup.ApplySchedule();
         return Ok(new
         {
             section = env.Section,