chore: use min()/max() builtins (Go 1.21+)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

pkg/cli/frame.go

@@ -266,10 +266,7 @@ func (f *Frame) viewLocked() string {
 			footerH = 1
 		}
 	}
-	middleH := h - headerH - footerH
-	if middleH < 1 {
-		middleH = 1
-	}
+	middleH := max(h-headerH-footerH, 1)
 
 	// Render each region
 	header := f.renderRegionLocked(RegionHeader, w, headerH)
@@ -287,10 +284,7 @@ func (f *Frame) viewLocked() string {
 			rightW = w / 4
 		}
 	}
-	contentW := w - leftW - rightW
-	if contentW < 1 {
-		contentW = 1
-	}
+	contentW := max(w-leftW-rightW, 1)
 
 	left := f.renderRegionLocked(RegionLeft, leftW, middleH)
 	right := f.renderRegionLocked(RegionRight, rightW, middleH)

pkg/cli/styles.go

@@ -288,10 +288,7 @@ func (t *Table) constrainWidths(widths []int) {
 	}
 
 	// Shrink widest columns first until we fit.
-	budget := t.maxWidth - overhead
-	if budget < cols {
-		budget = cols
-	}
+	budget := max(t.maxWidth-overhead, cols)
 	for total-overhead > budget {
 		maxIdx, maxW := 0, 0
 		for i, w := range widths {