fix(churn): constrain name column and halve bar width to prevent overflow

Author: phlx0

internal/ui/tab_churn.go

@@ -19,24 +19,35 @@ func (m Model) tabChurn() string {
 		return b.String()
 	}
 
+	// Name column: leave room for bar (bw/2) + stats (~14 chars) + padding
+	nameCol := m.width - bw/2 - 20
+	if nameCol < 15 {
+		nameCol = 15
+	}
+	if nameCol > 36 {
+		nameCol = 36
+	}
+
 	maxChanges := s.Churn[0].Changes
 	for i, e := range s.Churn {
 		pct := 0.0
 		if maxChanges > 0 {
 			pct = float64(e.Changes) / float64(maxChanges) * 100
 		}
-		// Trim long paths to basename for narrow terminals
 		name := e.File
-		if len(name) > 40 {
+		if len(name) > nameCol {
 			name = "…" + filepath.Base(name)
+			if len(name) > nameCol {
+				name = name[len(name)-nameCol:]
+			}
 		}
 		style := accentStyle
 		if i == 0 {
 			style = warnStyle
 		}
-		fmt.Fprintf(&b, "  %-42s %s  %s\n",
-			name,
-			bar(pct, bw),
+		fmt.Fprintf(&b, "  %-*s %s  %s\n",
+			nameCol, name,
+			bar(pct, bw/2),
 			style.Render(fmt.Sprintf("%d (%.1f%%)", e.Changes, e.Percent)),
 		)
 	}