refactor(openflare): migrate console APIs to v1 and centralize routing

Move OpenFlare management endpoints to /api/v1/custom/openflare with
Wavelet response envelopes and Abort* error handling. Keep agent, relay,
and flared protocol routes on /api/* with the legacy compat format.

- Add apiutil helpers and Swagger annotations for console handlers
- Register all OpenFlare routes in internal/router/openflare (not apps)
- Switch frontend services to OpenFlareBaseService and v1 paths
- Remove dead auth/compat code and legacy-base.service.ts
- Update integration tests and changelog

Wavelet/internal/apps/openflare/apiutil/bind.go

@@ -0,0 +1,39 @@
+// Copyright 2026 Arctel.net
+// SPDX-License-Identifier: Apache-2.0
+
+// Package apiutil provides HTTP helpers for OpenFlare v1 custom API handlers.
+package apiutil
+
+import (
+	"strconv"
+
+	"github.com/Rain-kl/Wavelet/internal/common/response"
+	"github.com/gin-gonic/gin"
+)
+
+const errInvalidParams = "参数错误"
+const errInvalidID = "无效的 ID"
+
+// BindJSON binds JSON body; returns false after aborting with 400.
+func BindJSON(c *gin.Context, dst any) bool {
+	if err := c.ShouldBindJSON(dst); err != nil {
+		response.AbortBadRequest(c, errInvalidParams)
+		return false
+	}
+	return true
+}
+
+// IDParam parses :id from the URL path.
+func IDParam(c *gin.Context) (uint, bool) {
+	raw := c.Param("id")
+	if raw == "" {
+		response.AbortBadRequest(c, errInvalidID)
+		return 0, false
+	}
+	id64, err := strconv.ParseUint(raw, 10, 64)
+	if err != nil || id64 == 0 {
+		response.AbortBadRequest(c, errInvalidID)
+		return 0, false
+	}
+	return uint(id64), true
+}