feat(ECR-011): 昵称、首页贴士与档案 Self 唯一/合盘交叉校验

每账号仅一条 self（migration 40902）；合盘只选 TA；账号昵称可改；首页穿衣/颜色/养生贴士。

Co-authored-by: Cursor <cursoragent@cursor.com>

apps/api/internal/handler/home.go

@@ -5,6 +5,7 @@ import (
 
 	"github.com/gin-gonic/gin"
 
+	"github.com/yuxingu/digital-psychology/apps/api/internal/middleware"
 	"github.com/yuxingu/digital-psychology/apps/api/internal/repository"
 	"github.com/yuxingu/digital-psychology/apps/api/internal/service/home"
 	"github.com/yuxingu/digital-psychology/apps/api/pkg/response"
@@ -19,6 +20,7 @@ type HomeHandler struct {
 func (h *HomeHandler) Register(api *gin.RouterGroup) {
 	g := api.Group("/home")
 	g.GET("/tools", h.Tools)
+	g.GET("/daily-tips", h.DailyTips)
 }
 
 func (h *HomeHandler) Tools(c *gin.Context) {
@@ -32,3 +34,13 @@ func (h *HomeHandler) Tools(c *gin.Context) {
 	}
 	response.OK(c, gin.H{"items": items})
 }
+
+func (h *HomeHandler) DailyTips(c *gin.Context) {
+	uid, _ := middleware.UserIDFromContext(c)
+	tips, err := h.Svc.DailyTips(c.Request.Context(), uid)
+	if err != nil {
+		response.Fail(c, http.StatusInternalServerError, 50031, "daily tips failed")
+		return
+	}
+	response.OK(c, tips)
+}