refactor: Style transaction items for untracked accounts

This commit extends the "Untrack Account" feature by applying a special style to transaction items that belong to an untracked account.

- The transaction item template is modified to apply a "dimmed" style to transactions from untracked accounts.
- The styling follows the precedence: Account (untracked) > Category (muted) > Transaction (hidden).
- The dropdown menu for transaction items now shows "Controlled by account" if the transaction's account is untracked.

app/apps/net_worth/views.py

@@ -27,10 +27,12 @@ def net_worth(request):
         view_type = request.session.get("networth_view_type", "current")
 
     if view_type == "current":
-        transactions_currency_queryset = Transaction.objects.filter(
-            is_paid=True, account__is_archived=False
-        ).order_by(
-            "account__currency__name",
+        transactions_currency_queryset = (
+            Transaction.objects.filter(is_paid=True, account__is_archived=False)
+            .order_by(
+                "account__currency__name",
+            )
+            .exclude(account__in=request.user.untracked_accounts.all())
         )
         transactions_account_queryset = Transaction.objects.filter(
             is_paid=True, account__is_archived=False
@@ -39,10 +41,12 @@ def net_worth(request):
             "account__name",
         )
     else:
-        transactions_currency_queryset = Transaction.objects.filter(
-            account__is_archived=False
-        ).order_by(
-            "account__currency__name",
+        transactions_currency_queryset = (
+            Transaction.objects.filter(account__is_archived=False)
+            .order_by(
+                "account__currency__name",
+            )
+            .exclude(account__in=request.user.untracked_accounts.all())
         )
         transactions_account_queryset = Transaction.objects.filter(
             account__is_archived=False