Finish packaging and change to src-based packaging layout, replace caddy with haproxy for performance, and update docker-compose and Dockerfiles for new packaging.

src/pkmntrade_club/theme/templates/trades/trade_offer_create.html

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+{% extends 'base.html' %}
+{% load card_multiselect %}
+
+{% block title %}Create Trade Offer{% endblock title %}
+
+{% block content %}
+<div class="container mx-auto max-w-xl mt-6">
+  <h2 class="text-2xl font-bold mb-4">Create a Trade Offer</h2>
+  <form method="post" action="{% url 'trade_offer_confirm_create' %}" novalidate class="space-y-4">
+    {% csrf_token %}
+    
+    {% include "trades/_friend_code_select.html" with friend_codes=friend_codes selected_friend_code=selected_friend_code field_name=form.initiated_by.html_name label="Initiated by" %}
+    
+    <!-- Card Selectors: "Have" and "Want" -->
+    <div class="grid grid-cols-1 md:grid-cols-2 gap-4">
+      <div class="form-control">
+        {% with have_values=form.have_cards.value|default:form.initial.have_cards %}
+          {% card_multiselect "have_cards" "I Have:" "Select some cards..." cards have_values %}
+        {% endwith %}
+      </div>
+      <div class="form-control">
+        {% with want_values=form.want_cards.value|default:form.initial.want_cards %}
+          {% card_multiselect "want_cards" "I Want:" "Select some cards..." cards want_values %}
+        {% endwith %}
+      </div>
+    </div>
+    
+    <button type="submit" name="preview" class="btn btn-primary w-full">Preview Trade Offer</button>
+  </form>
+  {% if form.errors %}
+    <div class="alert alert-error mt-4">
+      <strong>Please correct the errors below:</strong>
+      <ul class="mt-2">
+          {% for field in form %}
+            {% for error in field.errors %}
+              <li>{{ error }}</li>
+            {% endfor %}
+          {% endfor %}
+          {% for error in form.non_field_errors %}
+            <li>{{ error }}</li>
+          {% endfor %}
+      </ul>
+    </div>
+  {% endif %}
+</div>
+{% endblock content %}