feat: add kb_account_type custom field to Journal Entry

Adds a hidden, read-only 'KB Account Type' (Income/Expense) field
to Journal Entry via Custom Field, visible only in list view.
Populated automatically when a JE is created from a KB transaction:
- Pay (drcr=D) → Expense
- Receive (drcr=C) → Income

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

kapital_bank/bank_api.py

@@ -1645,6 +1645,7 @@ def _import_one_transaction(txn_data, settings, purpose_rules, purpose_threshold
         je.cheque_no = ref_no
         je.cheque_date = parsed_date
         je.user_remark = purpose
+        je.kb_account_type = "Expense" if payment_type == "Pay" else "Income"
 
         # Compute per-account amounts with proper multi-currency handling
         currency_precision = cint(frappe.db.get_single_value("System Settings", "currency_precision") or 2)

kapital_bank/mapping.py

@@ -446,6 +446,7 @@ def _create_journal_entry_for_brt(txn, paid_from, paid_to, bank_txn, multi_curre
 		je.cheque_no = ref_no
 		je.cheque_date = posting_date
 		je.user_remark = bank_txn.description or txn.get("purpose") or ""
+		je.kb_account_type = "Expense" if is_pay else "Income"
 		if is_multi:
 			je.multi_currency = 1
 

kapital_bank/setup.py

@@ -4,11 +4,13 @@ import frappe
 def after_install():
     cleanup_payment_entry_custom_fields()
     ensure_bank_transaction_custom_fields()
+    ensure_journal_entry_custom_fields()
 
 
 def after_migrate():
     cleanup_payment_entry_custom_fields()
     ensure_bank_transaction_custom_fields()
+    ensure_journal_entry_custom_fields()
 
 
 KB_FIELDS = [
@@ -32,6 +34,21 @@ def ensure_bank_transaction_custom_fields():
     frappe.db.commit()
 
 
+def ensure_journal_entry_custom_fields():
+    if not frappe.db.exists("Custom Field", {"dt": "Journal Entry", "fieldname": "kb_account_type"}):
+        cf = frappe.new_doc("Custom Field")
+        cf.dt = "Journal Entry"
+        cf.fieldname = "kb_account_type"
+        cf.fieldtype = "Select"
+        cf.options = "\nIncome\nExpense"
+        cf.label = "KB Account Type"
+        cf.in_list_view = 1
+        cf.hidden = 1
+        cf.read_only = 1
+        cf.insert(ignore_permissions=True)
+    frappe.db.commit()
+
+
 def cleanup_payment_entry_custom_fields():
     for fieldname in KB_FIELDS:
         if frappe.db.exists("Custom Field", {"dt": "Payment Entry", "fieldname": fieldname}):