Fix market nav link: point to coop.rose-ash.com/market/ not market subdomain

The market menu item in the top bar should link to the blog page at
coop_url('/market/'), not to market_url('/') which goes to the market
subdomain. Reverts the incorrect 'market' addition to _app_slugs.

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

browser/templates/_types/menu_items/_nav_oob.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"
      hx-swap-oob="outerHTML">

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 %}