feat: daily node restart controlled from the admin, connect timings as a default line task [CI]

Agents and Probes exit in order at a configured time (default 04:30 UTC+8, switch and time zone in the admin settings) and the service manager starts them again; a local restart_at or MOSHIRO_RESTART_AT wins. The connect kind (TCP connect and TLS handshake timings) is now a default continuous line template, with a section on the line page.

backend/tests/MoShiro.Backend.Tests/OperationsAndSecurityTests.cs

@@ -139,7 +139,7 @@ public sealed class OperationsAndSecurityTests
     public async Task OversizedFrames_CloseTheConnection_WithoutHarmingTheServer()
     {
         await using AgentSimulator agent = await _backend.ConnectAgentAsync();
-        await agent.WaitForTaskSetAsync(s => s.Tasks.Count == 2);
+        await agent.WaitForTaskSetAsync(s => s.Tasks.Count == Defaults.TaskCount);
         try
         {
             await agent.SendBinaryAsync(new byte[17 * 1024 * 1024]);
@@ -153,14 +153,14 @@ public sealed class OperationsAndSecurityTests
 
         // 服务端仍然正常
         await using AgentSimulator another = await _backend.ConnectAgentAsync();
-        Assert.NotNull(await another.WaitForTaskSetAsync(s => s.Tasks.Count == 2));
+        Assert.NotNull(await another.WaitForTaskSetAsync(s => s.Tasks.Count == Defaults.TaskCount));
     }
 
     [Fact]
     public async Task MalformedAndUnknownMessages_AreIgnoredOrRefused_AndTheConnectionStaysUsable()
     {
         await using AgentSimulator agent = await _backend.ConnectAgentAsync();
-        await agent.WaitForTaskSetAsync(s => s.Tasks.Count == 2);
+        await agent.WaitForTaskSetAsync(s => s.Tasks.Count == Defaults.TaskCount);
 
         await agent.SendTextAsync("{not json");
         await agent.SendTextAsync("[]");
@@ -187,7 +187,7 @@ public sealed class OperationsAndSecurityTests
         Assert.Empty(agent.TaskSets);
 
         await agent.HelloAsync();
-        Assert.NotNull(await agent.WaitForTaskSetAsync(s => s.Tasks.Count == 2));
+        Assert.NotNull(await agent.WaitForTaskSetAsync(s => s.Tasks.Count == Defaults.TaskCount));
     }
 
     [Fact]
@@ -205,9 +205,9 @@ public sealed class OperationsAndSecurityTests
     public async Task ReconnectingTheSameNode_ReplacesTheOldConnection()
     {
         AgentSimulator first = await _backend.ConnectAgentAsync();
-        await first.WaitForTaskSetAsync(s => s.Tasks.Count == 2);
+        await first.WaitForTaskSetAsync(s => s.Tasks.Count == Defaults.TaskCount);
         await using AgentSimulator second = await _backend.ReconnectAsync(first);
-        await second.WaitForTaskSetAsync(s => s.Tasks.Count == 2);
+        await second.WaitForTaskSetAsync(s => s.Tasks.Count == Defaults.TaskCount);
 
         // 旧连接被替换掉，但节点仍然在线（在线状态属于新连接）
         await first.WaitUntilAsync(() => first.CloseReason is not null);