Remove cross-domain template copies, use shared macros

- Cart mini: use macros/cart_icon.html for ticket OOB updates
- Post header: use blog_url() instead of url_for('blog.post.post_detail')

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

templates/_types/cart/_mini.html

@@ -1,45 +0,0 @@
-{% macro mini(oob=False, count=None) %}
-<div id="cart-mini" {% if oob %}hx-swap-oob="{{oob}}"{% endif %} >
-  {# cart_count is set by the context processor in all apps.
-     Cart app computes it from g.cart + calendar_cart_entries;
-     other apps get it from the cart internal API.
-     count param allows explicit override when macro is imported without context. #}
-  {% if count is not none %}
-    {% set _count = count %}
-  {% elif cart_count is defined and cart_count is not none %}
-    {% set _count = cart_count %}
-  {% elif cart is defined and cart is not none %}
-    {% set _count = (cart | sum(attribute="quantity")) + ((calendar_cart_entries | length) if calendar_cart_entries else 0) %}
-  {% else %}
-    {% set _count = 0 %}
-  {% endif %}
-
-  {% if _count == 0 %}
-  <div class="h-12 w-12 rounded-full overflow-hidden border border-stone-300 flex-shrink-0">
-    <a
-      href="{{ blog_url('/') }}"
-      class="h-full w-full font-bold text-5xl flex-shrink-0 flex flex-row items-center gap-1"
-    >
-      <img
-        src="{{ site().logo }}"
-        class="h-full w-full rounded-full object-cover border border-stone-300 flex-shrink-0"
-      >
-    </a>
-  </div>
-  {% else %}
-
-    <a
-      href="{{ cart_url('/') }}"
-      class="relative inline-flex items-center justify-center text-stone-700 hover:text-emerald-700"
-    >
-      <i class="fa fa-shopping-cart text-5xl" aria-hidden="true"></i>
-
-      <span
-        class="absolute top-1/2 left-1/2 -translate-x-1/2 -translate-y-1/2 inline-flex items-center justify-center rounded-full bg-emerald-600 text-white text-sm w-5 h-5"
-      >
-        {{ _count }}
-      </span>
-    </a>
-  {% endif %}
-</div>
-{% endmacro %}

templates/_types/post/header/_header.html

@@ -1,7 +1,7 @@
 {% import 'macros/links.html' as links %}
 {% macro header_row(oob=False) %}
   {% call links.menu_row(id='post-row', oob=oob) %}
-    {% call links.link(url_for('blog.post.post_detail', slug=post.slug), hx_select_search ) %}
+    {% call links.link(blog_url('/' + post.slug + '/'), hx_select_search ) %}
       {% if post.feature_image %}
       <img
           src="{{ post.feature_image }}"

templates/_types/tickets/_adjust_response.html

@@ -1,4 +1,4 @@
 {# Response for ticket adjust — buy form + OOB cart-mini update #}
-{% from '_types/cart/_mini.html' import mini %}
-{{ mini(oob='true', count=cart_count) }}
+{% from 'macros/cart_icon.html' import cart_icon %}
+{{ cart_icon(count=cart_count, oob='true') }}
 {% include '_types/tickets/_buy_form.html' %}

templates/_types/tickets/_buy_result.html

@@ -1,7 +1,7 @@
 {# Shown after ticket purchase — replaces the buy form #}
 {# OOB: refresh cart badge to reflect new ticket count #}
-{% from '_types/cart/_mini.html' import mini with context %}
-{{ mini(oob='true') }}
+{% from 'macros/cart_icon.html' import cart_icon %}
+{{ cart_icon(count=cart_count|default(0), oob='true') }}
 
 <div id="ticket-buy-{{ entry.id }}" class="rounded-xl border border-emerald-200 bg-emerald-50 p-4">
   <div class="flex items-center gap-2 mb-3">