refactor(*): 平台架构 - 拆分后端领域模块并同步插件协议与模型能力

backend/internal/app/error_codes.go

@@ -0,0 +1,42 @@
+package app
+
+import "infinite-canvas/backend/internal/kernel"
+
+// 错误码和原因已迁到 kernel；此处保留兼容别名。
+const (
+	CodeOK                  = kernel.CodeOK
+	CodeInvalidArgument     = kernel.CodeInvalidArgument
+	CodeUnauthorized        = kernel.CodeUnauthorized
+	CodeForbidden           = kernel.CodeForbidden
+	CodeNotFound            = kernel.CodeNotFound
+	CodeConflict            = kernel.CodeConflict
+	CodeTooManyRequests     = kernel.CodeTooManyRequests
+	CodeInternal            = kernel.CodeInternal
+	CodeBadGateway          = kernel.CodeBadGateway
+	CodeUnavailable         = kernel.CodeUnavailable
+	CodeTimeout             = kernel.CodeTimeout
+	CodeQuotaExceeded       = kernel.CodeQuotaExceeded
+	CodeIdempotencyConflict = kernel.CodeIdempotencyConflict
+	CodeRateLimited         = kernel.CodeRateLimited
+)
+
+type ErrorReason = kernel.ErrorReason
+
+const (
+	ReasonInvalidArgument    = kernel.ReasonInvalidArgument
+	ReasonUnauthorized       = kernel.ReasonUnauthorized
+	ReasonForbidden          = kernel.ReasonForbidden
+	ReasonNotFound           = kernel.ReasonNotFound
+	ReasonConflict           = kernel.ReasonConflict
+	ReasonFailedPrecondition = kernel.ReasonFailedPrecondition
+	ReasonQuotaExceeded      = kernel.ReasonQuotaExceeded
+	ReasonRateLimited        = kernel.ReasonRateLimited
+	ReasonUnavailable        = kernel.ReasonUnavailable
+	ReasonTimeout            = kernel.ReasonTimeout
+	ReasonInternal           = kernel.ReasonInternal
+	ReasonBadGateway         = kernel.ReasonBadGateway
+)
+
+func ReasonForStatus(status int) ErrorReason {
+	return kernel.ReasonForStatus(status)
+}