fix(base): correct natural sort of numbers with leading zeros (#38163)

### Description

`NaturalSortCompare` (`modules/base/natural_sort.go`) compares two
numeric run parts by **raw string length**:

```go
if len(part1) != len(part2) {
    return len(part1) - len(part2)
}
```

"Longer digit string = larger number" only holds without leading zeros.
With zero-padded numbers the comparison inverts:

- `file0001` vs `file2` → claims `file0001 > file2`, but `1 < 2`
- `a08` vs `a9` → claims `a08 > a9`, but `8 < 9`

This affects any natural-ordered listing where zero-padded and shorter
unpadded numbers mix (branch/tag/file names, etc.).

### Fix

Strip leading zeros before comparing digit-count magnitude; on equal
magnitude fall back to collation, then to the original length so fewer
leading zeros sort first. Added a small `naturalSortTrimZeros` helper
(keeps one char so `"000"` → `"0"`).

Signed-off-by: Seonghyun Hong <s3onghyun.hong@gmail.com>
Signed-off-by: wxiaoguang <wxiaoguang@gmail.com>
Co-authored-by: silverwind <me@silverwind.io>
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>

modules/base/natural_sort.go

@@ -4,6 +4,7 @@
 package base
 
 import (
+	"strings"
 	"unicode/utf8"
 
 	"golang.org/x/text/collate"
@@ -41,6 +42,15 @@ func naturalSortAdvance(str string, pos int) (end int, isNumber bool) {
 	return end, isNumber
 }
 
+// naturalSortTrimZeros strips leading '0's, keeping one character so "000" collapses to "0"
+func naturalSortTrimZeros(num string) string {
+	i := 0
+	for i < len(num)-1 && num[i] == '0' {
+		i++
+	}
+	return num[i:]
+}
+
 // NaturalSortCompare compares two strings so that they could be sorted in natural order
 func NaturalSortCompare(s1, s2 string) int {
 	// There is a bug in Golang's collate package: https://github.com/golang/go/issues/67997
@@ -54,10 +64,14 @@ func NaturalSortCompare(s1, s2 string) int {
 		part1, part2 := s1[pos1:end1], s2[pos2:end2]
 		if isNum1 && isNum2 {
 			if part1 != part2 {
-				if len(part1) != len(part2) {
+				num1, num2 := naturalSortTrimZeros(part1), naturalSortTrimZeros(part2)
-					return len(part1) - len(part2)
+				if len(num1) != len(num2) {
+					return len(num1) - len(num2) // without leading zeros, more digits means larger value
 				}
-				return c.CompareString(part1, part2)
+				if cmp := strings.Compare(num1, num2); cmp != 0 {
+					return cmp // equal digit count, so byte order is numeric order
+				}
+				return len(part1) - len(part2) // equal value, fewer leading zeros sorts first
 			}
 		} else {
 			if cmp := c.CompareString(part1, part2); cmp != 0 {

modules/base/natural_sort_test.go

@@ -40,4 +40,9 @@ func TestNaturalSortLess(t *testing.T) {
 
 	testLess("A-2", "A-11")
 	testLess("0.txt", "1.txt")
+
+	testLess("file0001", "file2")
+	testLess("a8", "a08")
+	testLess("00", "1")
+	testLess("0", "00") // equal value, fewer leading zeros sorts first
 }