fix: A1-17 route bds2://new-post deep links into transform pipeline and draft creation

test/bds/desktop/deep_link_test.exs

@@ -0,0 +1,34 @@
+defmodule BDS.Desktop.DeepLinkTest do
+  use ExUnit.Case, async: false
+
+  alias BDS.Desktop.DeepLink
+
+  setup do
+    topic = "deep-link-test:#{System.unique_integer([:positive])}"
+    Phoenix.PubSub.subscribe(BDS.PubSub, topic)
+
+    {:ok, pid} = DeepLink.start_link(name: nil, pubsub: BDS.PubSub, topic: topic)
+    on_exit(fn -> if Process.alive?(pid), do: GenServer.stop(pid) end)
+
+    %{pid: pid, topic: topic}
+  end
+
+  test "broadcasts a bds2:// open_url event to the shell topic", %{pid: pid} do
+    url = "bds2://new-post?title=Hello&url=https://example.com"
+    send(pid, {:open_url, [url]})
+
+    assert_receive {:blogmark_deep_link, ^url}, 500
+  end
+
+  test "ignores non-bds2 open_url events", %{pid: pid} do
+    send(pid, {:open_url, ["https://example.com"]})
+
+    refute_receive {:blogmark_deep_link, _url}, 200
+  end
+
+  test "ignores unrelated messages", %{pid: pid} do
+    send(pid, {:open_file, ["/tmp/x"]})
+
+    refute_receive {:blogmark_deep_link, _url}, 200
+  end
+end