Collapse multiline text in table cells

internal/output/render.go

@@ -667,6 +667,9 @@ func formatCell(val any) string {
 		return ""
 	case string:
 		v = ansi.Strip(v)
+		if strings.ContainsAny(v, "\n\r") {
+			v = strings.Join(strings.Fields(v), " ")
+		}
 		// Truncate long strings (rune-safe for multi-byte UTF-8)
 		if utf8.RuneCountInString(v) > 40 {
 			runes := []rune(v)

internal/presenter/format.go

@@ -141,17 +141,22 @@ func formatPerson(val any) string {
 	return ""
 }
 
-// singleLine returns the first non-empty line from s, trimmed.
+// singleLine collapses multiline text into a single line by joining all
+// non-empty lines with spaces. Leading/trailing whitespace is trimmed.
 func singleLine(s string) string {
-	if strings.IndexByte(s, '\n') == -1 {
+	if !strings.ContainsAny(s, "\n\r") {
 		return strings.TrimSpace(s)
 	}
+	// Normalize \r\n and bare \r to \n before splitting.
+	s = strings.ReplaceAll(s, "\r\n", "\n")
+	s = strings.ReplaceAll(s, "\r", "\n")
+	var parts []string
 	for _, line := range strings.Split(s, "\n") {
 		if trimmed := strings.TrimSpace(line); trimmed != "" {
-			return trimmed
+			parts = append(parts, trimmed)
 		}
 	}
-	return ""
+	return strings.Join(parts, " ")
 }
 
 // formatText converts any value to a string representation.

internal/presenter/presenter_test.go

@@ -1646,10 +1646,10 @@ func TestFormatTextBcAttachmentOnly(t *testing.T) {
 	}
 }
 
-func TestSingleLineSkipsLeadingBlanks(t *testing.T) {
+func TestSingleLineCollapsesMultiline(t *testing.T) {
 	got := singleLine("\n\nfirst\nsecond")
-	if got != "first" {
-		t.Errorf("singleLine = %q, want %q", got, "first")
+	if got != "first second" {
+		t.Errorf("singleLine = %q, want %q", got, "first second")
 	}
 }
 
@@ -1660,6 +1660,25 @@ func TestSingleLinePlainText(t *testing.T) {
 	}
 }
 
+func TestSingleLineCollapsesAllLines(t *testing.T) {
+	got := singleLine("line one\nline two\nline three")
+	if got != "line one line two line three" {
+		t.Errorf("singleLine = %q, want %q", got, "line one line two line three")
+	}
+}
+
+func TestSingleLineCollapsesBareCarriageReturn(t *testing.T) {
+	got := singleLine("a\rb")
+	if got != "a b" {
+		t.Errorf("singleLine = %q, want %q", got, "a b")
+	}
+
+	got = singleLine("x\r\ny\rz")
+	if got != "x y z" {
+		t.Errorf("singleLine(mixed) = %q, want %q", got, "x y z")
+	}
+}
+
 func TestRenderHeadlineHTMLContent(t *testing.T) {
 	schema := &EntitySchema{
 		Identity: Identity{Label: "content"},
@@ -1671,8 +1690,8 @@ func TestRenderHeadlineHTMLContent(t *testing.T) {
 	if strings.Contains(got, "<") {
 		t.Errorf("RenderHeadline should strip HTML tags, got: %q", got)
 	}
-	if got != "Title" {
-		t.Errorf("RenderHeadline = %q, want %q", got, "Title")
+	if got != "Title subtitle" {
+		t.Errorf("RenderHeadline = %q, want %q", got, "Title subtitle")
 	}
 }