refactor(distribution): 重写分销迁移并落地利润百分比分成与货架比例

将 000064-000078 合并为 064/065/066，默认规则改为收号 35%、卖出 40%、服务费 25%。
货架调价改为增加分站 1 元兑换哈夫币比例。sql-guard 仅保护 main 已发布迁移。

backend/internal/router/router.go

@@ -417,7 +417,8 @@ func New(cfg config.Config, deps Dependencies, logger *zap.Logger) *gin.Engine {
 		api.GET("/home-announcements", systemConfigHandler.HomeAnnouncements)
 		api.GET("/mobile-home-config", systemConfigHandler.HomeConfig)
 		api.GET("/public/files/object", fileHandler.PublicObject)
-		api.GET("/distribution/sites/:site_code/listings", distributionHandler.ListPublicSiteListings)
+		// Gin 同一前缀只能有一种通配符名；管理端已用 /sites/:id/*，公开列表必须同名。
+		api.GET("/distribution/sites/:id/listings", distributionHandler.ListPublicSiteListings)
 		api.GET("/distribution/site-info", distributionHandler.GetPublicSiteInfo)
 		api.POST("/payments/leshua/notify", paymentHandler.LeshuaNotify)
 		api.POST("/payments/lakala/notify", paymentHandler.LakalaNotify)

backend/internal/router/router_test.go

@@ -60,6 +60,8 @@ func TestExtractedAdminRoutesRemainRegisteredWithoutDuplicates(t *testing.T) {
 		"PUT /api/admin/roles/:id/permissions",
 		"PUT /api/admin/admin-users/:id/password",
 		"POST /api/admin/announcements/:id/publish",
+		"GET /api/distribution/sites/:id/listings",
+		"GET /api/distribution/sites/:id/wallet",
 	} {
 		if _, exists := registered[key]; !exists {
 			t.Errorf("missing route after extraction: %s", key)