feat(runtime): track node lifecycle and QUIC link state

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

@@ -36,6 +36,20 @@ public sealed class AgentEndToEndTests : IClassFixture<BackendFixture>
 
         await using ProbeSimulator probe = await agent.ConnectProbeAsync();
         await BackendFixture.EventuallyAsync(async () => (await AgentViewAsync(agent))["probe_connected"]!.GetValue<bool>());
+        await BackendFixture.EventuallyAsync(async () => (await AgentViewAsync(agent))["runtime_status"]!.GetValue<string>() == "running");
+    }
+
+    [Fact]
+    public async Task Agent_OrderlyShutdownIsReportedAsStoppingRatherThanOffline()
+    {
+        AgentHarness agent = await AgentHarness.StartAsync(_backend);
+        await BackendFixture.EventuallyAsync(async () => (await AgentViewAsync(agent))["runtime_status"]!.GetValue<string>() == "running");
+
+        await agent.DisposeAsync();
+
+        await BackendFixture.EventuallyAsync(async () => !(await AgentViewAsync(agent))["online"]!.GetValue<bool>());
+        JsonNode final = await AgentViewAsync(agent);
+        Assert.Equal("stopping", final["runtime_status"]!.GetValue<string>());
     }
 
     [Fact]

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

@@ -77,4 +77,19 @@ public sealed class LinkTests : IClassFixture<BackendFixture>
         using HttpResponseMessage noAgent = await SetLinkAsync(probe, "agt_missing", false);
         Assert.Equal(HttpStatusCode.NotFound, noAgent.StatusCode);
     }
+
+    [Fact]
+    public async Task Links_RetryEnablesPairAndReportsWhenProbeIsOffline()
+    {
+        await using AgentSimulator agent = await _backend.ConnectAgentAsync();
+        string probe = await _backend.CreateProbeIdAsync();
+
+        using HttpResponseMessage response = await _backend.Admin.PostAsync($"/api/admin/links/{probe}/{agent.NodeId.Value}/retry", BackendFixture.Json(new JsonObject()));
+        Assert.Equal(HttpStatusCode.Accepted, response.StatusCode);
+        JsonNode body = JsonNode.Parse(await response.Content.ReadAsStringAsync())!;
+        Assert.False(body["queued"]!.GetValue<bool>());
+        Assert.True(body["link"]!["linked"]!.GetValue<bool>());
+        Assert.Equal("probe_unavailable", body["link"]!["connection_state"]!.GetValue<string>());
+        Assert.Contains("Probe 状态", body["link"]!["connection_reason"]!.GetValue<string>());
+    }
 }

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

@@ -48,6 +48,7 @@ public sealed class ProbeEndToEndTests : IClassFixture<BackendFixture>
 
         // 直连面板：在线，hello 里的系统、架构和版本都被记下来了
         await BackendFixture.EventuallyAsync(async () => (await _backend.GetJsonAsync(_backend.Admin, path))["online"]!.GetValue<bool>(), because: "the probe links to the panel");
+        await BackendFixture.EventuallyAsync(async () => (await _backend.GetJsonAsync(_backend.Admin, path))["runtime_status"]!.GetValue<string>() == "probe_paused", because: "a Probe without any enabled Agent endpoints reports paused probing");
         await BackendFixture.EventuallyAsync(
             async () => (await _backend.GetJsonAsync(_backend.Anonymous, "/api/public/nodes"))["items"]!.AsArray().Any(n => n!["id"]!.GetValue<string>() == probe.ProbeId && n["os"] is not null && n["arch"] is not null),
             because: "the platform comes from the probe's own hello");
@@ -58,6 +59,7 @@ public sealed class ProbeEndToEndTests : IClassFixture<BackendFixture>
         await BackendFixture.EventuallyAsync(async () =>
             !(await _backend.GetJsonAsync(_backend.Admin, path))["online"]!.GetValue<bool>() && !probe.App.Link.IsConnected,
             because: "a revoked probe is disconnected and cannot come back");
+        Assert.Equal("maintenance", (await _backend.GetJsonAsync(_backend.Admin, path))["runtime_status"]!.GetValue<string>());
     }
 
     [Fact]