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/router/v1/openflare/register_proxy_route.go

@@ -0,0 +1,22 @@
+// Copyright 2026 Arctel.net
+// SPDX-License-Identifier: Apache-2.0
+
+package openflare
+
+import (
+	"github.com/Rain-kl/Wavelet/internal/apps/openflare/apiutil"
+	"github.com/Rain-kl/Wavelet/internal/apps/openflare/proxy_route"
+	"github.com/gin-gonic/gin"
+)
+
+func registerProxyRouteRoutes(apiGroup *gin.RouterGroup) {
+	proxyRouteGroup := apiGroup.Group("/proxy-routes")
+	proxyRouteGroup.Use(apiutil.AdminRequired())
+	{
+		apiutil.RegisterCollection(proxyRouteGroup, "GET", proxy_route.GetProxyRoutes)
+		proxyRouteGroup.GET("/:id", proxy_route.GetProxyRouteHandler)
+		apiutil.RegisterCollection(proxyRouteGroup, "POST", proxy_route.CreateProxyRouteHandler)
+		proxyRouteGroup.POST("/:id/update", proxy_route.UpdateProxyRouteHandler)
+		proxyRouteGroup.POST("/:id/delete", proxy_route.DeleteProxyRouteHandler)
+	}
+}