fix 404 handling for unknown url prefixes

Unknown prefixes like /shoppppp/thing now correctly return 404
instead of trying to resolve as a custom page. Also records
broken URLs for admin review.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

lib/berrypod_web/live/shop/page.ex

@@ -194,6 +194,12 @@ defmodule BerrypodWeb.Shop.Page do
     # For custom_page action, check if slug is a custom URL for a system page
     {action, params} = resolve_custom_slug(action, params)
 
+    # Handle unrecognised routes (e.g., /shoppppp/thing)
+    if action == :not_found do
+      record_broken_url(current_path)
+      raise BerrypodWeb.NotFoundError
+    end
+
     # Update live_action if we resolved to a different page type
     socket =
       if action != socket.assigns.live_action do
@@ -430,9 +436,42 @@ defmodule BerrypodWeb.Shop.Page do
       nil ->
         # Not a known prefix - check if combined path is a system page (e.g. checkout/success)
         combined_slug = prefix <> "/" <> id_or_slug
-        resolve_custom_slug(:custom_page, Map.put(other_params, "slug", combined_slug))
+
+        case R.page_type_from_slug(combined_slug) do
+          {:page, page_type} ->
+            {page_type, other_params}
+
+          {:custom, _page} ->
+            {:custom_page, Map.put(other_params, "slug", combined_slug)}
+
+          nil ->
+            # Unknown prefix and not a valid page - 404
+            {:not_found, other_params}
+        end
     end
   end
 
   defp resolve_custom_slug(action, params), do: {action, params}
+
+  # Record broken URL for 404 tracking (mirrors CustomPage.record_broken_url)
+  defp record_broken_url(path) do
+    unless static_path?(path) do
+      prior_hits = Berrypod.Analytics.count_pageviews_for_path(path)
+      Berrypod.Redirects.record_broken_url(path, prior_hits)
+
+      if prior_hits > 0 do
+        Berrypod.Redirects.attempt_auto_resolve(path)
+      end
+    end
+  rescue
+    _ -> :ok
+  end
+
+  defp static_path?(path) do
+    String.starts_with?(path, "/assets/") or
+      String.starts_with?(path, "/images/") or
+      String.starts_with?(path, "/image_cache/") or
+      String.starts_with?(path, "/mockups/") or
+      String.starts_with?(path, "/favicon")
+  end
 end