Fix dashboard dark mode readability by using theme-aware text colors

- Use  and  instead of hardcoded zinc colors in EditorDashboardLive
- Apply same fix to MicroprintsLive description paragraph
- All titles now respect the active theme and remain readable in both light and dark modes

app/test/firehose_web/live/editor_dashboard_live_test.exs

@@ -86,5 +86,15 @@ defmodule FirehoseWeb.EditorDashboardLiveTest do
       {:ok, _view, html} = live(conn, ~p"/editor/dashboard")
       refute html =~ "Live Post"
     end
+
+    test "renders with app layout including menu", %{conn: conn} do
+      {:ok, _view, html} = live(conn, ~p"/editor/dashboard")
+      # Verify the app layout is applied by checking for menu elements
+      assert html =~ "Willem's firehose"
+      assert html =~ "Blog"
+      assert html =~ "Releases"
+      assert html =~ "Contact"
+      assert html =~ "Dashboard" # This should be in the menu
+    end
   end
 end