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_update.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/update"
+	"github.com/gin-gonic/gin"
+)
+
+func registerUpdateRoutes(apiGroup *gin.RouterGroup) {
+	updateRoute := apiGroup.Group("/update")
+	updateRoute.Use(apiutil.AdminRequired())
+	{
+		updateRoute.GET("/latest-release", update.GetLatestReleaseHandler)
+		updateRoute.GET("/logs/ws", update.StreamServerUpgradeLogsHandler)
+		updateRoute.POST("/manual-upload", update.UploadManualServerBinaryHandler)
+		updateRoute.POST("/manual-upgrade", update.ConfirmManualServerUpgradeHandler)
+		updateRoute.POST("/upgrade", update.UpgradeServerHandler)
+	}
+}