rename project from SimpleshopTheme to Berrypod

All modules, configs, paths, and references updated.
836 tests pass, zero warnings.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

test/berrypod_web/controllers/error_html_test.exs

@@ -0,0 +1,20 @@
+defmodule BerrypodWeb.ErrorHTMLTest do
+  use BerrypodWeb.ConnCase, async: true
+
+  # Bring render_to_string/4 for testing custom views
+  import Phoenix.Template, only: [render_to_string: 4]
+
+  test "renders 404.html with themed page" do
+    html = render_to_string(BerrypodWeb.ErrorHTML, "404", "html", [])
+    assert html =~ "404"
+    assert html =~ "Page Not Found"
+    assert html =~ "shop-root"
+  end
+
+  test "renders 500.html with themed page" do
+    html = render_to_string(BerrypodWeb.ErrorHTML, "500", "html", [])
+    assert html =~ "500"
+    assert html =~ "Server Error"
+    assert html =~ "shop-root"
+  end
+end