周期性 -race 重跑抓到真实 bug：wsClientCore.enqueue close 后 select 随机选择致契约违反；确定性先查 done 修复+测试循环加固+gofmt 存量漂移清理

Result: {"status":"keep","total_issues":8,"eslint_errors":0,"eslint_problems":0,"eslint_warnings":0,"golint_canonicalheader":0,"golint_errname":0,"golint_errorlint":1,"golint_exhaustive":0,"golint_forcetypeassert":0,"golint_gosec":0,"golint_intrange":0,"golint_modernize":3,"golint_nilnil":3,"golint_perfsprint":0,"golint_prealloc":0,"golint_recvcheck":1,"golint_test_testifylint":0,"golint_test_thelper":0,"golint_test_total":0,"golint_test_usetesting":0,"golint_total":8,"golint_usestdlibvars":0,"golint_vetx_total":0,"golint_wastedassign":0,"measure_s":95,"tsc_errors":0,"vitest_failed":0,"vitest_total":126}

internal/apps/openflare/websocket/agent_hub.go

@@ -12,7 +12,6 @@ import (
 	"time"
 
 	"github.com/gin-gonic/gin"
-
 )
 
 const (
@@ -35,8 +34,6 @@ type agentClient struct {
 	onStatus   AgentStatusHandler
 }
 
-
-
 type agentHub struct {
 	mu      sync.RWMutex
 	clients map[string]*agentClient

internal/apps/openflare/websocket/client_core.go

@@ -36,9 +36,14 @@ func (c *wsClientCore) close() {
 // enqueue best-effort delivers message; it never blocks and fails fast when
 // the client is closed or its send buffer is full.
 func (c *wsClientCore) enqueue(message Message) bool {
+	// 先确定性检查 closed：若与发送合并在同一个 select，两个 case 同时就绪时
+	// Go 会随机选择，close 后仍可能投递成功。
 	select {
 	case <-c.done:
 		return false
+	default:
+	}
+	select {
 	case c.send <- message:
 		return true
 	default:

internal/apps/openflare/websocket/client_core_test.go

@@ -35,8 +35,12 @@ func TestWSClientCoreEnqueueFailsAfterClose(t *testing.T) {
 		done: make(chan struct{}),
 	}
 	core.close()
-	if core.enqueue(Message{Type: messageTypePing}) {
-		t.Fatal("enqueue must fail after close")
+	// 循环多次：若 close 检查与发送合并在同一个 select，两 case 同时就绪时
+	// Go 随机选择，单次调用可能碰巧通过。
+	for range 50 {
+		if core.enqueue(Message{Type: messageTypePing}) {
+			t.Fatal("enqueue must fail after close")
+		}
 	}
 }
 

internal/apps/openflare/websocket/flared_hub.go

@@ -23,7 +23,6 @@ type flaredClient struct {
 	wsClientCore
 }
 
-
 type flaredHub struct {
 	mu      sync.RWMutex
 	clients map[string]*flaredClient

internal/apps/openflare/websocket/relay_hub.go

@@ -17,7 +17,6 @@ type relayClient struct {
 	wsClientCore
 }
 
-
 type relayHub struct {
 	mu      sync.RWMutex
 	clients map[string]*relayClient