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/constant/sentence.go

@@ -0,0 +1,90 @@
+package constant
+
+import (
+	"bytes"
+	_ "embed"
+	"encoding/json"
+	"math/rand"
+	"sync"
+)
+
+//go:embed sentence1-10000.json
+var sentenceData []byte
+
+type Sentence struct {
+	Name string `json:"name"`
+	From string `json:"from"`
+}
+
+var (
+	lineCount    int
+	lineOffsets  []int64
+	sentenceOnce sync.Once
+)
+
+// initSentences 初始化：统计行数和记录每行偏移
+func initSentences() {
+	sentenceOnce.Do(func() {
+		data := sentenceData
+		var offset int64 = 0
+		for {
+			// 记录当前行的起始位置
+			lineOffsets = append(lineOffsets, offset)
+			lineCount++
+
+			// 寻找下一个换行符
+			idx := bytes.IndexByte(data[offset:], '\n')
+			if idx == -1 {
+				// 最后一行没有换行符
+				break
+			}
+
+			// 移动到下一行的起始位置
+			offset += int64(idx) + 1
+			if offset >= int64(len(data)) {
+				break
+			}
+		}
+	})
+}
+
+// GetRandomSentence 随机获取一条古诗词
+func GetRandomSentence() string {
+	initSentences()
+	if lineCount <= 0 {
+		return "欢迎使用任务池"
+	}
+
+	targetIndex := rand.Intn(lineCount)
+	start := lineOffsets[targetIndex]
+
+	// 确定当前行的结束位置
+	var end int64
+	if targetIndex < lineCount-1 {
+		end = lineOffsets[targetIndex+1]
+	} else {
+		end = int64(len(sentenceData))
+	}
+
+	// 提取行并清理两端的空白字符（包括 \r, \n）
+	line := bytes.TrimSpace(sentenceData[start:end])
+	if len(line) == 0 {
+		return "欢迎使用任务池"
+	}
+
+	var sData []string
+	if err := json.Unmarshal(line, &sData); err == nil && len(sData) >= 1 {
+		name := sData[0]
+		from := ""
+		if len(sData) >= 2 {
+			from = sData[1]
+		}
+
+		if from != "" {
+			return "\"" + name + "\"—— " + from
+		}
+		return name
+	}
+
+	return "欢迎使用任务池"
+}