refactor: use dynamic Docker-style tables for stack listings

manage.sh

@@ -582,11 +582,34 @@ run_all_sequential() {
 	fi
 }
 
+print_table() {
+	local columns="$1"
+	shift
+	local -a cells=("$@") widths=()
+	local index column row
+
+	for ((index = 0; index < ${#cells[@]}; index++)); do
+		column=$((index % columns))
+		if ((${#cells[index]} > ${widths[column]:-0})); then
+			widths[column]="${#cells[index]}"
+		fi
+	done
+
+	for ((row = 0; row < ${#cells[@]}; row += columns)); do
+		for ((column = 0; column < columns; column++)); do
+			((column > 0)) && printf '   '
+			if ((column == columns - 1)); then
+				printf '%s\n' "${cells[row + column]}"
+			else
+				printf '%-*s' "${widths[column]}" "${cells[row + column]}"
+			fi
+		done
+	done
+}
+
 list_stacks() {
 	local stack stage_name status
-
-	printf '%-24s %-16s %s\n' "STACK" "STAGE" "STATUS"
-	printf '%-24s %-16s %s\n' "------------------------" "----------------" "---------------"
+	local -a cells=(STACK STAGE STATUS)
 
 	for stack in "${DISCOVERED_STACKS[@]}"; do
 		if contains "$stack" "${EXCLUDED_STACKS[@]}"; then
@@ -597,40 +620,35 @@ list_stacks() {
 			status="managed"
 		fi
 
-		printf '%-24s %-16s %s\n' "$stack" "$stage_name" "$status"
+		cells+=("$stack" "$stage_name" "$status")
 	done
-}
 
-stack_images() {
-	local stack="$1"
-	local output image
-
-	output="$(compose "$stack" config --images)" || return 1
-
-	while IFS= read -r image; do
-		[[ -n "$image" ]] || continue
-		printf '%-24s %s\n' "$stack" "$image"
-	done <<<"$output"
+	print_table 3 "${cells[@]}"
 }
 
 list_images() {
 	local target="${1:-}"
-	local stack
+	local stack output image
 	local failed=0
-
-	printf '%-24s %s\n' "STACK" "IMAGE"
-	printf '%-24s %s\n' "------------------------" "----------------------------------------"
+	local -a stacks=("${MANAGED_STACKS[@]}") cells=(STACK IMAGE)
 
 	if [[ -n "$target" ]]; then
 		require_target "images" "$target"
-		stack_images "$target"
-		return
+		stacks=("$target")
 	fi
 
-	for stack in "${MANAGED_STACKS[@]}"; do
-		stack_images "$stack" || ((failed += 1))
+	for stack in "${stacks[@]}"; do
+		if ! output="$(compose "$stack" config --images)"; then
+			((failed += 1))
+			continue
+		fi
+		while IFS= read -r image; do
+			[[ -n "$image" ]] || continue
+			cells+=("$stack" "$image")
+		done <<<"$output"
 	done
 
+	print_table 2 "${cells[@]}"
 	((failed == 0))
 }