06/02 Update add new balance option

app/templates/accounts/form.html

@@ -53,6 +53,20 @@
             {{ form.notes(class="form-control", rows=2, placeholder="Optional notes") }}
         </div>
 
+        {% if not account %}
+        <div class="mb-4">
+            {{ form.opening_balance.label(class="form-label fw-medium", style="font-size:13px;") }}
+            <div class="input-group">
+                <span class="input-group-text" style="font-size:13px;">{{ current_user.currency_symbol }}</span>
+                {{ form.opening_balance(class="form-control", placeholder="0.00", id="openingBalance") }}
+            </div>
+            <div style="font-size:11px;color:var(--muted);margin-top:4px;">
+                Current real-world balance. Leave at 0 if you'll enter all transactions from scratch.
+                For credit cards, enter a negative value if you currently owe money (e.g. -500).
+            </div>
+        </div>
+        {% endif %}
+
         <div class="d-flex gap-2">
             {{ form.submit(class="btn btn-primary") }}
             <a href="{{ url_for('accounts.index') }}" class="btn btn-outline-secondary">Cancel</a>