Refactor add meal flow and remove v2 routes

Migrated add_meal_v2 routes and templates to add_meal, renaming endpoints and updating references throughout the app. Removed legacy daily_log2 route and template, consolidating to daily_log. Moved macro_arr_to_json to utils.py for reuse. Updated navigation and redirect logic to use new routes. Improved item finding and barcode scanning UI.

application/add_meal/templates/step4.html

@@ -0,0 +1,22 @@
+{% extends "base.html" %}
+
+{% block content %}
+<p>{{ item.name }}</p>
+
+<form method="POST">
+    {{ form.hidden_tag() }}
+
+    <div class="mb-3">
+        <div class="form-control-plaintext">
+            {{item_id}}
+        </div>
+    </div>
+
+    <div class="mb-3">
+        {{ form.amount.label(class="form-label") }}
+        {{ form.amount(class="form-control") }}
+    </div>
+
+    {{ form.submit(class="btn btn-primary") }}
+</form>
+{% endblock%}