Remove legacy mobile web-capable

app/controllers/manifest_controller.rb

@@ -0,0 +1,22 @@
+# frozen_string_literal: true
+
+class ManifestController < ApplicationController
+  def show
+    render json: '{
+      "short_name": "diaspora*",
+      "name": "diaspora*",
+      "description": "diaspora* is a free, decentralized and privacy respectful social network",
+      "icons": [
+        {
+          "src": "/icon.png",
+          "type": "image/png",
+          "sizes": "192x192"
+        }
+      ],
+      "start_url": "/",
+      "background_color": "#000000",
+      "display": "standalone",
+      "theme_color": "#000000"
+    }'
+  end
+end

app/views/layouts/_head.haml

@@ -4,8 +4,6 @@
 %meta{charset: "utf-8"}/
 = content_for?(:meta_data) ? yield(:meta_data) : metas_tags
 
-%meta{content: "yes", name: "mobile-web-app-capable"}/
-
 / favicon
 / For Apple devices
 %link{rel: "apple-touch-icon", href: image_path("apple-touch-icon.png")}

app/views/layouts/application.html.haml

@@ -12,7 +12,7 @@
       = load_javascript_locales
 
     = include_color_theme
-    = render "head"
+    = render "layouts/head"
     = translation_missing_warnings
 
   %body{class: "page-#{controller_name} action-#{action_name}"}

app/views/layouts/application.mobile.haml

@@ -17,11 +17,6 @@
     %meta{name: "MobileOptimized", content: "320"}/
     %meta{"http-equiv" => "cleartype", :content => "on"}/
 
-    / iOS mobile web app indicator
-    / NOTE(we will enable these once we don't have to rely on back/forward buttons anymore)
-    /%meta{:name => "apple-mobile-web-app-capable", :content => "yes"}
-    /%link{:rel => "apple-touch-startup-image", :href => "/images/apple-splash.png"}
-
   %body
     #app
       = render "layouts/header"

config/routes.rb

@@ -239,4 +239,5 @@ Rails.application.routes.draw do
   end
 
   get ".well-known/openid-configuration", to: "api/openid_connect/discovery#configuration"
+  get "manifest.json", to: "manifest#show"
 end