Initial commit: TaskPool React panel

- React frontend with route-level code splitting
- Backend rebranded from Baihu to TaskPool
- DB brand migration script and local compatibility

internal/utils/encoding.go

@@ -0,0 +1,92 @@
+package utils
+
+import (
+	"bufio"
+	"io"
+	"unicode/utf8"
+
+	"golang.org/x/text/encoding/simplifiedchinese"
+	"golang.org/x/text/transform"
+)
+
+// ToUTF8 converts potentially non-UTF8 data (like GBK on Windows) to UTF-8
+func ToUTF8(data []byte) string {
+	if utf8.Valid(data) {
+		return string(data)
+	}
+	// Try GBK (common on Windows)
+	reader := transform.NewReader(
+		bufio.NewReader(
+			&byteReader{data: data},
+		),
+		simplifiedchinese.GBK.NewDecoder(),
+	)
+	result, err := io.ReadAll(reader)
+	if err != nil {
+		return string(data)
+	}
+	return string(result)
+}
+
+type byteReader struct {
+	data []byte
+	pos  int
+}
+
+func (r *byteReader) Read(p []byte) (n int, err error) {
+	if r.pos >= len(r.data) {
+		return 0, io.EOF
+	}
+	n = copy(p, r.data[r.pos:])
+	r.pos += n
+	return n, nil
+}
+
+// TrimLastRunes 从字符串尾部保留最多 maxRunes 个字符（不仅限于 ASCII，支持中英文混排的真实字符数量）
+func TrimLastRunes(s string, maxRunes int) string {
+	// 如果字符串的总字节数小于等于 maxRunes，那么它的字符数一定也小于等于 maxRunes
+	if len(s) <= maxRunes {
+		return s
+	}
+
+	count := 0
+	for i := len(s); i > 0; {
+		_, size := utf8.DecodeLastRuneInString(s[:i])
+		i -= size
+		count++
+		if count == maxRunes {
+			return s[i:]
+		}
+	}
+	return s
+}
+
+// IntToStr 将整数转换为字符串
+func IntToStr(n int) string {
+	if n == 0 {
+		return "0"
+	}
+	
+	var negative bool
+	if n < 0 {
+		negative = true
+		n = -n
+	}
+	
+	var digits []byte
+	for n > 0 {
+		digits = append(digits, byte('0'+n%10))
+		n /= 10
+	}
+	
+	if negative {
+		digits = append(digits, '-')
+	}
+	
+	// Reverse
+	for i, j := 0, len(digits)-1; i < j; i, j = i+1, j-1 {
+		digits[i], digits[j] = digits[j], digits[i]
+	}
+	
+	return string(digits)
+}