Add meta tags for OGP to following & follow page (mastodon#2052)

* Add meta tags for OGP to following & follow page

* simplify render helper

* Follow up mastodon#2133

* og:type is only accounts/show

* revert accounts/{following,followers}

app/views/accounts/_og.html.haml

@@ -0,0 +1,7 @@
+%meta{ property: 'og:site_name', content: site_title }/
+%meta{ property: 'og:title', content: [yield(:page_title).strip.presence, site_title].compact.join(' - ') }/
+%meta{ property: 'og:description', content: account.note }/
+%meta{ property: 'og:image', content: full_asset_url(account.avatar.url(:original)) }/
+%meta{ property: 'og:image:width', content: '120' }/
+%meta{ property: 'og:image:height', content: '120' }/
+%meta{ property: 'twitter:card', content: 'summary' }/

app/views/accounts/show.html.haml

@@ -5,14 +5,8 @@
   %link{ rel: 'salmon', href: api_salmon_url(@account.id) }/
   %link{ rel: 'alternate', type: 'application/atom+xml', href: account_url(@account, format: 'atom') }/
 
-  %meta{ property: 'og:site_name', content: site_title }/
   %meta{ property: 'og:type', content: 'profile' }/
-  %meta{ property: 'og:title', content: "#{@account.username} on #{site_hostname}" }/
-  %meta{ property: 'og:description', content: @account.note }/
-  %meta{ property: 'og:image', content: full_asset_url(@account.avatar.url(:original)) }/
-  %meta{ property: 'og:image:width', content: '120' }/
-  %meta{ property: 'og:image:height', content: '120' }/
-  %meta{ property: 'twitter:card', content: 'summary' }/
+  = render 'og', account: @account
 
 - if show_landing_strip?
   = render partial: 'shared/landing_strip', locals: { account: @account }

app/views/follower_accounts/index.html.haml

@@ -1,6 +1,9 @@
 - content_for :page_title do
   = t('accounts.people_who_follow', name: display_name(@account))
 
+- content_for :header_tags do
+  = render 'accounts/og', account: @account
+
 = render 'accounts/header', account: @account
 
 = render 'accounts/follow_grid', accounts: @accounts

app/views/following_accounts/index.html.haml

@@ -1,6 +1,9 @@
 - content_for :page_title do
   = t('accounts.people_followed_by', name: display_name(@account))
 
+- content_for :header_tags do
+  = render 'accounts/og', account: @account
+
 = render 'accounts/header', account: @account
 
 = render 'accounts/follow_grid', accounts: @accounts