更新管理后台布局，优化菜单项标签，新增支付配置项。同时，调整API响应字段命名，确保一致性，提升代码可读性和维护性。

soul-api/internal/handler/search.go

@@ -0,0 +1,81 @@
+package handler
+
+import (
+	"net/http"
+	"strings"
+	"unicode/utf8"
+
+	"soul-api/internal/database"
+	"soul-api/internal/model"
+
+	"github.com/gin-gonic/gin"
+)
+
+// escapeLike 转义 LIKE 中的 % _ \，防止注入与通配符滥用
+func escapeLike(s string) string {
+	s = strings.ReplaceAll(s, "\\", "\\\\")
+	s = strings.ReplaceAll(s, "%", "\\%")
+	s = strings.ReplaceAll(s, "_", "\\_")
+	return s
+}
+
+// SearchGet GET /api/search?q= 从 chapters 表搜索（GORM，参数化）
+func SearchGet(c *gin.Context) {
+	q := strings.TrimSpace(c.Query("q"))
+	if q == "" {
+		c.JSON(http.StatusBadRequest, gin.H{"success": false, "error": "请输入搜索关键词"})
+		return
+	}
+	pattern := "%" + escapeLike(q) + "%"
+	var list []model.Chapter
+	err := database.DB().Model(&model.Chapter{}).
+		Where("section_title LIKE ? OR content LIKE ?", pattern, pattern).
+		Order("sort_order ASC, id ASC").
+		Limit(50).
+		Find(&list).Error
+	if err != nil {
+		c.JSON(http.StatusOK, gin.H{"success": true, "data": gin.H{"keyword": q, "total": 0, "results": []interface{}{}}})
+		return
+	}
+	lowerQ := strings.ToLower(q)
+	results := make([]gin.H, 0, len(list))
+	for _, ch := range list {
+		matchType := "content"
+		score := 5
+		if strings.Contains(strings.ToLower(ch.SectionTitle), lowerQ) {
+			matchType = "title"
+			score = 10
+		}
+		snippet := ""
+		pos := strings.Index(strings.ToLower(ch.Content), lowerQ)
+		if pos >= 0 && len(ch.Content) > 0 {
+			start := pos - 50
+			if start < 0 {
+				start = 0
+			}
+			end := pos + utf8.RuneCountInString(q) + 50
+			if end > len(ch.Content) {
+				end = len(ch.Content)
+			}
+			snippet = ch.Content[start:end]
+			if start > 0 {
+				snippet = "..." + snippet
+			}
+			if end < len(ch.Content) {
+				snippet = snippet + "..."
+			}
+		}
+		price := 1.0
+		if ch.Price != nil {
+			price = *ch.Price
+		}
+		results = append(results, gin.H{
+			"id": ch.ID, "title": ch.SectionTitle, "partTitle": ch.PartTitle, "chapterTitle": ch.ChapterTitle,
+			"price": price, "isFree": ch.IsFree, "matchType": matchType, "score": score, "snippet": snippet,
+		})
+	}
+	c.JSON(http.StatusOK, gin.H{
+		"success": true,
+		"data":    gin.H{"keyword": q, "total": len(results), "results": results},
+	})
+}