Feature: OG Social media cards

Not Original Gangsta, but ObjectGraph

Reason: images were showing on LinkedIn, but small.

app/test/firehose_web/layouts_test.exs

@@ -0,0 +1,58 @@
+defmodule FirehoseWeb.LayoutsTest do
+  use ExUnit.Case, async: true
+
+  alias FirehoseWeb.Layouts
+
+  @conn %Plug.Conn{
+    assigns: %{}
+  }
+
+  describe "put_content_for/3" do
+    test "stores content under the given key" do
+      conn = put_content_for(@conn, :meta_tags, %{og_title: "Test"})
+
+      assert conn.assigns[:content_for][:meta_tags] == [%{og_title: "Test"}]
+    end
+
+    test "appends multiple calls to the same key" do
+      conn =
+        @conn
+        |> put_content_for(:meta_tags, %{og_title: "First"})
+        |> put_content_for(:meta_tags, %{og_title: "Second"})
+
+      assert length(conn.assigns[:content_for][:meta_tags]) == 2
+      assert Enum.at(conn.assigns[:content_for][:meta_tags], 0).og_title == "First"
+      assert Enum.at(conn.assigns[:content_for][:meta_tags], 1).og_title == "Second"
+    end
+
+    test "stores different keys independently" do
+      conn =
+        @conn
+        |> put_content_for(:meta_tags, %{og_title: "Meta"})
+        |> put_content_for(:scripts, "%(script)")
+
+      assert Map.has_key?(conn.assigns[:content_for], :meta_tags)
+      assert Map.has_key?(conn.assigns[:content_for], :scripts)
+    end
+  end
+
+  describe "get_content_for/2" do
+    test "returns stored content for a key" do
+      content_for = %{meta_tags: [%{og_title: "Test"}]}
+
+      assert Layouts.get_content_for(%{content_for: content_for}, :meta_tags) ==
+               [%{og_title: "Test"}]
+    end
+
+    test "returns empty list when key does not exist" do
+      assert Layouts.get_content_for(%{content_for: %{}}, :nonexistent) == []
+    end
+
+    test "returns empty list when content_for is nil" do
+      assert Layouts.get_content_for(%{content_for: nil}, :nonexistent) == []
+    end
+  end
+
+  # Re-export for use in tests
+  defp put_content_for(conn, key, content), do: Layouts.put_content_for(conn, key, content)
+end