fix admin font loading and theme CSS cache miss bug

add system font stack to admin reset CSS so setup/admin pages render
sans-serif on all devices instead of falling through to browser default.
pass path_resolver to CSSGenerator.generate on cache miss paths so
font URLs resolve to digested paths in production.

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

lib/berrypod_web/controllers/error_html.ex

@@ -114,7 +114,7 @@ defmodule BerrypodWeb.ErrorHTML do
             css
 
           :miss ->
-            css = CSSGenerator.generate(theme_settings)
+            css = CSSGenerator.generate(theme_settings, &BerrypodWeb.Endpoint.static_path/1)
             CSSCache.put(css)
             css
         end

lib/berrypod_web/live/admin/providers/form.ex

@@ -138,7 +138,7 @@ defmodule BerrypodWeb.Admin.Providers.Form do
 
   defp maybe_add_name(params, type, _result) do
     provider = Provider.get(type)
-    Map.put_new(params, "name", provider && provider.name || type)
+    Map.put_new(params, "name", (provider && provider.name) || type)
   end
 
   defp encrypt_api_key(api_key) do

lib/berrypod_web/plugs/load_theme.ex

@@ -27,7 +27,7 @@ defmodule BerrypodWeb.Plugs.LoadTheme do
 
         :miss ->
           settings = Settings.get_theme_settings()
-          css = CSSGenerator.generate(settings)
+          css = CSSGenerator.generate(settings, &BerrypodWeb.Endpoint.static_path/1)
           CSSCache.put(css)
           {settings, css}
       end

lib/berrypod_web/theme_hook.ex

@@ -26,7 +26,7 @@ defmodule BerrypodWeb.ThemeHook do
           css
 
         :miss ->
-          css = CSSGenerator.generate(theme_settings)
+          css = CSSGenerator.generate(theme_settings, &BerrypodWeb.Endpoint.static_path/1)
           CSSCache.put(css)
           css
       end