refactor(plugins): restructure admin and message_gateway into standard layered sub-packages

backend/plugins/domain/cap/models.go

@@ -0,0 +1,37 @@
+// Copyright 2026 Arctel.net
+// SPDX-License-Identifier: Apache-2.0
+
+package cap
+
+import (
+	"Wavelet/plugins/domain/cap/pow"
+)
+
+// ChallengeResponse is a local type alias for the pow.ChallengeResponse struct
+type ChallengeResponse = pow.ChallengeResponse
+
+// challengeRequest is the CAPTCHA challenge request payload.
+type challengeRequest struct {
+	Scope string `json:"scope" form:"scope"`
+}
+
+// redeemRequest is the CAPTCHA redeem request payload.
+type redeemRequest struct {
+	Token     string `json:"token" binding:"required"`
+	Solutions []int  `json:"solutions" binding:"required"`
+	Scope     string `json:"scope" form:"scope"`
+}
+
+// RedeemResponse is returned to the client on redeem.
+type RedeemResponse struct {
+	Success bool   `json:"success"`
+	Token   string `json:"token,omitempty"`
+	Expires int64  `json:"expires,omitempty"`
+	Error   string `json:"error,omitempty"`
+}
+
+// configRecord maps the columns selected from the system config table.
+type configRecord struct {
+	Key   string `gorm:"column:key"`
+	Value string `gorm:"column:value"`
+}