refactor(errors): migrate decisions to {code,msg}

app/(order)/chat/[id]/page.tsx

@@ -150,7 +150,7 @@ export default function ChatDetailPage({ params }: { params: Promise<{ id: strin
                 const file = event.target.files?.[0]
                 if (!file) return
                 const result = sendImageMessage(session.id, URL.createObjectURL(file))
-                if (result && !result.ok) notifyInfo(result.message ?? "发送失败")
+                if (!result.ok) notifyInfo(result.error.msg)
                 event.target.value = ""
               }}
             />
@@ -162,8 +162,8 @@ export default function ChatDetailPage({ params }: { params: Promise<{ id: strin
                 if (!text) return
 
                 const result = sendTextMessage(session.id, text)
-                if (result && !result.ok) {
-                  notifyInfo(result.message ?? "发送失败")
+                if (!result.ok) {
+                  notifyInfo(result.error.msg)
                   return
                 }
                 setInput("")

app/(order)/dispute/[id]/page.tsx

@@ -112,7 +112,7 @@ export default function DisputePage({ params }: { params: Promise<{ id: string }
       evidence: files,
     })
     if (!result.decision.ok) {
-      notifyInfo(result.decision.message ?? "提交争议失败")
+      notifyInfo(result.decision.error.msg)
       return
     }
     router.replace(`/dispute/${id}?submitted=1`)
@@ -288,7 +288,7 @@ export default function DisputePage({ params }: { params: Promise<{ id: string }
                         evidence: responseFiles,
                       })
                       if (!decision.ok) {
-                        notifyInfo(decision.message ?? "提交回应失败")
+                        notifyInfo(decision.error.msg)
                       }
                     }}
                     disabled={!responseReason.trim()}
@@ -336,7 +336,7 @@ export default function DisputePage({ params }: { params: Promise<{ id: string }
                         reason: appealReason,
                       })
                       if (!decision.ok) {
-                        notifyInfo(decision.message ?? "提交申诉失败")
+                        notifyInfo(decision.error.msg)
                       }
                     }}
                     disabled={!appealReason.trim()}

app/(order)/order/new/page.tsx

@@ -7,8 +7,8 @@ import { Input } from "@/components/ui/input"
 import { Label } from "@/components/ui/label"
 import { Separator } from "@/components/ui/separator"
 import { Textarea } from "@/components/ui/textarea"
+import type { Actor } from "@/lib/actor"
 import { getPlayerById, getServiceById } from "@/lib/api"
-import type { Actor } from "@/lib/policy/actor"
 import { notifySuccess } from "@/lib/toast"
 import { useRequireAuth } from "@/lib/use-require-auth"
 import { useAuthStore } from "@/store/auth"

app/(order)/review/[id]/page.tsx

@@ -154,7 +154,7 @@ export default function ReviewPage({ params }: { params: Promise<{ id: string }>
                 return
               }
 
-              notifyInfo(decision.message ?? "评价提交失败")
+              notifyInfo(decision.error.msg)
             }}
           >
             提交评价