Remove /pleroma/oban and /phoenix/live_dashboard from API routes

This is needed to prevent admin frontend overrides from misbehaving when
overriding AdminFE located at /pleroma/admin, since API routes are
interpreted as the first portion of their full path, ie:
/api/v1/pleroma/admin -> /api

lib/pleroma/web/router.ex

@@ -1092,9 +1092,15 @@ defmodule Pleroma.Web.Router do
     options("/*path", RedirectController, :empty)
   end
 
+  # /pleroma/oban/* needs to get filtered out from api routes for frontend configuration
+  # to not drop admin overrides for /pleroma/admin.
+  # Also removing /phoenix since it is not an API route
+  @non_api_routes ["/phoenix/live_dashboard", "/pleroma/oban"]
+
   def get_api_routes do
     Phoenix.Router.routes(__MODULE__)
     |> Enum.reject(fn r -> r.plug == Pleroma.Web.Fallback.RedirectController end)
+    |> Enum.reject(fn r -> String.starts_with?(r.path, @non_api_routes) end)
     |> Enum.map(fn r ->
       r.path
       |> String.split("/", trim: true)

test/pleroma/web/plugs/frontend_static_plug_test.exs

@@ -106,7 +106,6 @@ defmodule Pleroma.Web.Plugs.FrontendStaticPlugTest do
       "manifest.json",
       "auth",
       "proxy",
-      "phoenix",
       "test",
       "user_exists",
       "check_password"