feat(admin): upgrade admin console UI widgets, add plan & status management, and redesign system status dashboard

sundynix-gateway/internal/handler/admin.go

@@ -339,6 +339,43 @@ func (h *Handler) AdminSetSharedBilling(c *gin.Context) {
 	c.JSON(http.StatusOK, gin.H{"status": "ok"})
 }
 
+// AdminSetTenantPlan: PUT /api/v1/admin/tenants/:id/plan {plan} —— 改方案等级。
+func (h *Handler) AdminSetTenantPlan(c *gin.Context) {
+	var b struct {
+		Plan string `json:"plan"`
+	}
+	if err := c.ShouldBindJSON(&b); err != nil || strings.TrimSpace(b.Plan) == "" {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "plan 必填"})
+		return
+	}
+	if err := h.db.SetTenantPlan(c.Request.Context(), c.Param("id"), b.Plan); err != nil {
+		c.JSON(http.StatusBadGateway, gin.H{"error": err.Error()})
+		return
+	}
+	c.JSON(http.StatusOK, gin.H{"status": "ok"})
+}
+
+// AdminSetTenantStatus: PUT /api/v1/admin/tenants/:id/status {status} —— 改租户状态（暂停/恢复）。
+func (h *Handler) AdminSetTenantStatus(c *gin.Context) {
+	var b struct {
+		Status string `json:"status"`
+	}
+	if err := c.ShouldBindJSON(&b); err != nil || strings.TrimSpace(b.Status) == "" {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "status 必填"})
+		return
+	}
+	if b.Status != "active" && b.Status != "suspended" {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "无效的 status，仅支持 active/suspended"})
+		return
+	}
+	if err := h.db.SetTenantStatus(c.Request.Context(), c.Param("id"), b.Status); err != nil {
+		c.JSON(http.StatusBadGateway, gin.H{"error": err.Error()})
+		return
+	}
+	c.JSON(http.StatusOK, gin.H{"status": "ok"})
+}
+
+
 // AdminMembers: GET /api/v1/admin/tenants/:id/members —— 某租户成员列表。
 func (h *Handler) AdminMembers(c *gin.Context) {
 	rows, err := h.db.ListMembers(c.Request.Context(), c.Param("id"))