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/v1.go

@@ -0,0 +1,27 @@
+// Copyright 2026 Arctel.net
+// SPDX-License-Identifier: Apache-2.0
+
+package openflare
+
+import "github.com/gin-gonic/gin"
+
+// V1BasePath is the OpenFlare console API prefix under /api/v1/custom.
+const V1BasePath = "/api/v1/custom/openflare"
+
+// RegisterV1Routes mounts OpenFlare management console APIs under /custom/openflare.
+// The parent group must already be the /custom router group from v1/custom.go.
+func RegisterV1Routes(customGroup *gin.RouterGroup) {
+	group := customGroup.Group("/openflare")
+	registerOptionRoutes(group)
+	registerOriginRoutes(group)
+	registerApplyLogRoutes(group)
+	registerProxyRouteRoutes(group)
+	registerNodeRoutes(group)
+	registerWAFRoutes(group)
+	registerTLSRoutes(group)
+	registerConfigVersionRoutes(group)
+	registerPagesRoutes(group)
+	registerDashboardRoutes(group)
+	registerObservabilityRoutes(group)
+	registerUpdateRoutes(group)
+}