add OpenGraph tags and a share image

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

app/views/layouts/application.html.erb

@@ -7,6 +7,20 @@
     <meta name="theme-color" content="#F5F6F0">
     <meta name="apple-mobile-web-app-capable" content="yes">
     <meta name="mobile-web-app-capable" content="yes">
+    <% titre_partage = content_for(:title) || "Comment ça Kluk ?" %>
+    <% description = content_for(:description) || "Pas besoin de demander comment ça va : il suffit de regarder la tasse." %>
+    <meta name="description" content="<%= description %>">
+    <meta property="og:type" content="website">
+    <meta property="og:site_name" content="Kluk">
+    <meta property="og:locale" content="fr_FR">
+    <meta property="og:title" content="<%= titre_partage %>">
+    <meta property="og:description" content="<%= description %>">
+    <meta property="og:url" content="<%= request.base_url + request.path %>">
+    <meta property="og:image" content="<%= image_url "charte/partage.png" %>">
+    <meta property="og:image:width" content="1200">
+    <meta property="og:image:height" content="630">
+    <meta property="og:image:alt" content="Trois tasses de couleur alignées sur une table, et une quatrième posée sur la Kluk, fumante.">
+    <meta name="twitter:card" content="summary_large_image">
     <%= csrf_meta_tags %>
     <%= csp_meta_tag %>
 

app/views/moods/public.html.erb

@@ -1,4 +1,5 @@
 <% content_for :title, "Comment ça Kluk chez #{@user.username} ?" %>
+<% content_for :description, "Les humeurs #{de_nom(@user.username)}, jour après jour, au rythme des tasses posées sur la Kluk." %>
 <% history = MoodCalendarService.generate_calendar(@user, start_date: 5.months.ago.beginning_of_month, end_date: Date.current) %>
 <% selected_date = (Date.parse(params[:day]) rescue Date.current) %>
 <% selected = find_day(history, selected_date) if selected_date < Date.current %>

spec/requests/home_spec.rb

@@ -0,0 +1,23 @@
+require 'rails_helper'
+
+describe "Home", type: :request do
+  describe "GET / on a public user's subdomain" do
+    let(:user) { create(:user, username: "alice", public: true) }
+
+    before { host! "#{user.username}.example.com" }
+
+    it "exposes OpenGraph tags for sharing" do
+      get root_path, params: { day: "2026-01-15" }
+
+      expect(response).to have_http_status(:ok)
+      page = Nokogiri::HTML(response.body)
+      meta = ->(attr, name) { page.at_css("meta[#{attr}='#{name}']")&.[]("content") }
+
+      expect(meta.("property", "og:title")).to eq("Comment ça Kluk chez alice\u202F?")
+      expect(meta.("property", "og:description")).to start_with("Les humeurs d’alice")
+      expect(meta.("property", "og:url")).to eq("http://alice.example.com/")
+      expect(meta.("property", "og:image")).to match(%r{\Ahttp://alice\.example\.com/assets/charte/partage-\h+\.png\z})
+      expect(meta.("name", "twitter:card")).to eq("summary_large_image")
+    end
+  end
+end