init: 初始化 AssetX 项目仓库

包含 webapp（Next.js 用户端）、webapp-back（Go 后端）、
antdesign（管理后台）、landingpage（营销落地页）、
数据库 SQL 和配置文件。

webapp-back/lending/tokens.go

@@ -0,0 +1,80 @@
+package lending
+
+import (
+	"net/http"
+	"strconv"
+
+	"github.com/gin-gonic/gin"
+)
+
+// GetTokensInfo returns information about all supported tokens
+// GET /api/lending/tokens?chain_id=97
+func GetTokensInfo(c *gin.Context) {
+	chainId := parseChainID(c)
+
+	stablecoins, err := GetAllStablecoins(chainId)
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{
+			"success": false,
+			"error":   "failed to fetch stablecoins",
+		})
+		return
+	}
+
+	ytTokens, err := GetAllYTTokens(chainId)
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{
+			"success": false,
+			"error":   "failed to fetch YT tokens",
+		})
+		return
+	}
+
+	allTokens := make([]TokenInfo, 0, len(stablecoins)+len(ytTokens))
+	allTokens = append(allTokens, stablecoins...)
+	allTokens = append(allTokens, ytTokens...)
+
+	c.JSON(http.StatusOK, gin.H{
+		"success": true,
+		"data": gin.H{
+			"stablecoins": stablecoins,
+			"yt_tokens":   ytTokens,
+			"all_tokens":  allTokens,
+		},
+	})
+}
+
+// GetTokenInfo returns information about a specific token
+// GET /api/lending/tokens/:assetCode?chain_id=97
+func GetTokenInfo(c *gin.Context) {
+	assetCode := c.Param("assetCode")
+	chainId := parseChainID(c)
+
+	info, err := GetTokenInfoFromDB(assetCode)
+	if err != nil {
+		c.JSON(http.StatusNotFound, gin.H{
+			"success": false,
+			"error":   "token not found",
+		})
+		return
+	}
+	info.Decimals = resolveDecimals(info.ContractAddress, chainId, info.Decimals)
+
+	c.JSON(http.StatusOK, gin.H{
+		"success": true,
+		"data":    info,
+	})
+}
+
+// parseChainID reads chain_id from query string, returns 0 if not provided
+func parseChainID(c *gin.Context) int {
+	s := c.Query("chain_id")
+	if s == "" {
+		return 0
+	}
+	id, err := strconv.Atoi(s)
+	if err != nil {
+		return 0
+	}
+	return id
+}