Add simple button to manage subscription

app/controllers/settings/subscriptions_controller.rb

@@ -0,0 +1,7 @@
+# frozen_string_literal: true
+
+class Settings::SubscriptionsController < ApplicationController
+  before_action :authenticate_user!
+
+  def index; end
+end

app/views/settings/_navigation.html.erb

@@ -5,4 +5,7 @@
     <%= link_to 'Background Jobs', settings_background_jobs_path, role: 'tab', class: "tab #{active_tab?(settings_background_jobs_path)}" %>
   <% end %>
   <%= link_to 'Map', settings_maps_path, role: 'tab', class: "tab #{active_tab?(settings_maps_path)}" %>
+  <%# if !DawarichSettings.self_hosted? %>
+    <%= link_to 'Subscriptions', settings_subscriptions_path, role: 'tab', class: "tab #{active_tab?(settings_subscriptions_path)}" %>
+  <%# end %>
 </div>

app/views/settings/subscriptions/index.html.erb

@@ -0,0 +1,30 @@
+<% content_for :title, "Subscriptions" %>
+
+<div class="min-h-content w-full my-5">
+  <%= render 'settings/navigation' %>
+
+  <div class="hero bg-base-200 min-h-80">
+    <div class="hero-content text-center">
+      <div class="max-w-md">
+        <h1 class="text-5xl font-bold">Hello there!</h1>
+        <% if current_user.active? %>
+          <p class="py-6">
+            You are currently subscribed to Dawarich, hurray!
+          </p>
+
+          <p>
+            Your subscription will be valid for the next <span class="text-accent"><%= 365 %> days</span> and will be <span class="text-accent"><%= current_user.active? ? 'renewed automatically' : 'renewed manually' %></span>.
+          </p>
+
+          <%= link_to 'Manage subscription', '#', class: 'btn btn-primary my-4' %>
+        <% else %>
+          <p class="py-6">
+            You are currently not subscribed to Dawarich. How about we fix that?
+          </p>
+
+          <%= link_to 'Manage subscription', '#', class: 'btn btn-primary my-4' %>
+        <% end %>
+      </div>
+    </div>
+  </div>
+</div>

config/routes.rb

@@ -22,6 +22,7 @@ Rails.application.routes.draw do
     resources :users, only: %i[index create destroy edit update]
     resources :maps, only: %i[index]
     patch 'maps', to: 'maps#update'
+    resources :subscriptions, only: %i[index]
   end
 
   patch 'settings', to: 'settings#update'

spec/requests/settings/subscriptions_spec.rb

@@ -0,0 +1,7 @@
+require 'rails_helper'
+
+RSpec.describe "Settings::Subscriptions", type: :request do
+  describe "GET /index" do
+    pending "add some examples (or delete) #{__FILE__}"
+  end
+end