Initial commit: Clean Mold Cost Calculator application

- Flask-based mold cost calculation application
- PostgreSQL database with SQLAlchemy ORM
- Docker/Podman containerization
- Comprehensive documentation in docs/
- Clean, organized codebase without obsolete files
- Production-ready deployment configuration
- Enhanced pytest configuration with coverage reporting
- Master/Development branch structure

app/templates/_history.html

@@ -0,0 +1,15 @@
+<div class="list-group">
+    {% for quote in quote_history %}
+    <div class="list-group-item d-flex justify-content-between align-items-center">
+        <div>
+            <span class="badge bg-primary me-2">#{{ quote.id }}</span>
+            {{ quote.created_at.strftime('%Y-%m-%d %H:%M') }}
+        </div>
+        <div class="fw-bold">¥{{ "{:,.0f}".format(quote.total_cost) }}</div>
+    </div>
+    {% else %}
+    <div class="list-group-item text-muted">
+        No calculations yet
+    </div>
+    {% endfor %}
+</div>