修复计划接受流程的前后端状态不一致

src/hooks/useBlindboxPlan.ts

@@ -224,20 +224,30 @@ export function useBlindboxPlan(
   }, [profile, planDays, handlePlanDaysChange, toast]);
 
   const handleAcceptPlan = useCallback(async () => {
-    setPlanAccepted(true);
-    fireConfetti();
-    if (planId && profile) {
-      try {
-        const res = await fetch("/api/blindbox/plan", {
-          method: "PATCH",
-          headers: { "Content-Type": "application/json" },
-          body: JSON.stringify({ planId, userId: profile.id, action: "accept" }),
-        });
-        const data = await res.json();
-        setActiveContract({ id: planId, days: planDays, endTime: data.endTime ?? null });
-      } catch (e) { console.error("acceptPlan failed:", e); }
+    if (!planId || !profile) {
+      toast.show("计划信息不完整，请重新生成后再试");
+      return;
+    }
+
+    try {
+      const res = await fetch("/api/blindbox/plan", {
+        method: "PATCH",
+        headers: { "Content-Type": "application/json" },
+        body: JSON.stringify({ planId, userId: profile.id, action: "accept" }),
+      });
+      const data = await res.json().catch(() => ({}));
+      if (!res.ok) {
+        throw new Error(data.error || "接受契约失败");
+      }
+
+      setPlanAccepted(true);
+      setActiveContract({ id: planId, days: planDays, endTime: data.endTime ?? null });
+      fireConfetti();
+      toast.show("契约已接受！");
+    } catch (e) {
+      console.error("acceptPlan failed:", e);
+      toast.show(e instanceof Error ? e.message : "接受契约失败");
     }
-    toast.show("契约已接受！");
   }, [planId, profile, planDays, fireConfetti, toast]);
 
   const handleRegenerate = useCallback(() => {