fix: top menu Market link goes to coop blog page, not market app

Removed 'market' from _app_slugs so the Market menu item links
to coop.rose-ash.com/market/ (the blog page) instead of directly
to the market app. Individual markets are linked from the post nav.

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

suma_browser/templates/_types/root/_nav.html

@@ -1,4 +1,4 @@
-{% set _app_slugs = {'market': market_url('/'), 'cart': cart_url('/')} %}
+{% set _app_slugs = {'cart': cart_url('/')} %}
 <div class="flex flex-col sm:flex-row sm:items-center gap-2 border-r border-stone-200 mr-2 sm:max-w-2xl"
      id="menu-items-nav-wrapper">
   {% from 'macros/scrolling_menu.html' import scrolling_menu with context %}