feat(log): Seq 会话追踪、控制台降噪与推送质量增强

请求日志自动带 sid/request_id，支持 LogBind；挂 Seq 后控制台仅 Warn+，Seq 仍全量；并修毫秒时间戳、@m、失败重试与停机 flush。

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

log/capture_test.go

@@ -96,8 +96,8 @@ func TestToClef_PlainText(t *testing.T) {
 	if err := json.Unmarshal(clef, &m); err != nil {
 		t.Fatal(err)
 	}
-	if m["@mt"] != "plain log line" {
-		t.Fatalf("@mt=%v", m["@mt"])
+	if m["@m"] != "plain log line" {
+		t.Fatalf("@m=%v", m["@m"])
 	}
 	if m["source"] != "stdout" {
 		t.Fatalf("source=%v", m["source"])
@@ -107,6 +107,182 @@ func TestToClef_PlainText(t *testing.T) {
 	}
 }
 
+func TestWithFields_ChildHasFieldsParentClean(t *testing.T) {
+	parent, buf := newLoggerWithCapture(1)
+	child := parent.WithFields("sid", "abc123def456", "request_id", "fedcba987654")
+	child.Info().Msg("child-msg")
+	m := buf.lastJSON()
+	if m == nil {
+		t.Fatal("no output")
+	}
+	if m["sid"] != "abc123def456" || m["request_id"] != "fedcba987654" {
+		t.Fatalf("child fields missing: %v", m)
+	}
+	parent.Info().Msg("parent-msg")
+	m2 := buf.lastJSON()
+	if m2["sid"] != nil || m2["request_id"] != nil {
+		t.Fatalf("parent polluted: %v", m2)
+	}
+	// 错误历史父子共享
+	parent2 := NewLogger(1, "", 10)
+	child2 := parent2.WithFields("sid", "x")
+	child2.Error("shared-err")
+	if n := len(parent2.GetRecentErrors()); n != 1 {
+		t.Fatalf("shared error store want 1 got %d", n)
+	}
+}
+
+func TestToClef_MillisecondAndAtM(t *testing.T) {
+	sw := &SeqWriter{instance: "test:1"}
+	in := []byte(`{"level":"info","time":"2026-07-23 04:50:01.123","message":"hello {name}"}`)
+	clef := sw.toClef(in)
+	var m map[string]interface{}
+	if err := json.Unmarshal(clef, &m); err != nil {
+		t.Fatal(err)
+	}
+	if m["@m"] != "hello {name}" {
+		t.Fatalf("@m=%v", m["@m"])
+	}
+	if m["@mt"] != nil {
+		t.Fatalf("should not have @mt: %v", m["@mt"])
+	}
+	at, ok := m["@t"].(string)
+	if !ok || !strings.Contains(at, ".123") {
+		t.Fatalf("@t missing ms: %v", m["@t"])
+	}
+}
+
+func TestSeqWriter_RetryOnce(t *testing.T) {
+	var mu sync.Mutex
+	calls := 0
+	var gotBody string
+	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		body, _ := io.ReadAll(r.Body)
+		mu.Lock()
+		calls++
+		n := calls
+		if n == 1 {
+			mu.Unlock()
+			w.WriteHeader(http.StatusInternalServerError)
+			return
+		}
+		gotBody = string(body)
+		mu.Unlock()
+		w.WriteHeader(http.StatusCreated)
+	}))
+	defer srv.Close()
+
+	l := NewLogger(1, "", 0)
+	l.SetSeqWriter(srv.URL, "", "test:retry")
+	l.Info().Msg("retry-me")
+
+	deadline := time.Now().Add(4 * time.Second)
+	for time.Now().Before(deadline) {
+		mu.Lock()
+		ok := calls >= 2 && strings.Contains(gotBody, "retry-me")
+		mu.Unlock()
+		if ok {
+			return
+		}
+		time.Sleep(50 * time.Millisecond)
+	}
+	mu.Lock()
+	defer mu.Unlock()
+	t.Fatalf("retry failed: calls=%d body=%q", calls, gotBody)
+}
+
+func TestLevelFilterWriter_WarnOnly(t *testing.T) {
+	buf := &captureBuf{}
+	w := newLevelFilterWriter(buf, zerolog.WarnLevel)
+	mw := &multiWriter{writers: []io.Writer{w}}
+	zl := zerolog.New(mw).Level(zerolog.DebugLevel)
+	zl.Info().Msg("info-hidden")
+	zl.Warn().Msg("warn-shown")
+	buf.mu.Lock()
+	n := len(buf.lines)
+	buf.mu.Unlock()
+	if n != 1 {
+		t.Fatalf("want 1 console line got %d: %v", n, buf.lines)
+	}
+	if !strings.Contains(buf.lines[0], "warn-shown") {
+		t.Fatalf("unexpected: %v", buf.lines[0])
+	}
+}
+
+func TestSetSeqWriter_QuietsConsoleKeepsSeqFull(t *testing.T) {
+	var mu sync.Mutex
+	var gotBody string
+	srv := startFakeSeqServer(t, func(body string) {
+		mu.Lock()
+		gotBody += body
+		mu.Unlock()
+	})
+	defer srv.Close()
+
+	l := NewLogger(1, "", 0)
+	consoleBuf := &captureBuf{}
+	l.console.inner = consoleBuf
+	l.SetSeqWriter(srv.URL, "", "test:quiet")
+	l.Info().Msg("info-to-seq-only")
+	l.Warn().Msg("warn-both")
+
+	deadline := time.Now().Add(3 * time.Second)
+	for time.Now().Before(deadline) {
+		mu.Lock()
+		ok := strings.Contains(gotBody, "info-to-seq-only") && strings.Contains(gotBody, "warn-both")
+		mu.Unlock()
+		if ok {
+			break
+		}
+		time.Sleep(50 * time.Millisecond)
+	}
+	mu.Lock()
+	body := gotBody
+	mu.Unlock()
+	if !strings.Contains(body, "info-to-seq-only") || !strings.Contains(body, "warn-both") {
+		t.Fatalf("Seq incomplete: %q", body)
+	}
+	consoleBuf.mu.Lock()
+	defer consoleBuf.mu.Unlock()
+	for _, line := range consoleBuf.lines {
+		if strings.Contains(line, "info-to-seq-only") {
+			t.Fatalf("Info leaked to console: %v", consoleBuf.lines)
+		}
+	}
+	foundWarn := false
+	for _, line := range consoleBuf.lines {
+		if strings.Contains(line, "warn-both") {
+			foundWarn = true
+		}
+	}
+	if !foundWarn {
+		t.Fatalf("Warn missing on console: %v", consoleBuf.lines)
+	}
+	l.CloseSeq()
+}
+
+func TestSeqWriter_CloseFlushes(t *testing.T) {
+	var mu sync.Mutex
+	var gotBody string
+	srv := startFakeSeqServer(t, func(body string) {
+		mu.Lock()
+		gotBody += body
+		mu.Unlock()
+	})
+	defer srv.Close()
+
+	l := NewLogger(1, "", 0)
+	l.SetSeqWriter(srv.URL, "", "test:close")
+	l.Info().Msg("flush-on-close")
+	l.CloseSeq()
+
+	mu.Lock()
+	defer mu.Unlock()
+	if !strings.Contains(gotBody, "flush-on-close") {
+		t.Fatalf("Close did not flush: %q", gotBody)
+	}
+}
+
 func TestStdoutCapture_LongLine(t *testing.T) {
 	l, buf := newLoggerWithCapture(1)
 	pr, pw := io.Pipe()