feat: implement post-init and uninstall hooks to automatically sync and manage shared bank/cash accounts across company branches

__init__.py

@@ -1 +1,44 @@
 from . import models
+from odoo import api, SUPERUSER_ID
+
+def _auto_share_accounts_post_init(env):
+    """
+    Automatically link accounts from the Parent Company (ID 2 - OT) to any Branch Company 
+    that does not have its own Chart of Accounts.
+    """
+    # Link Parent Company (ID 2) accounts to other companies if they don't have their own COA
+    env.cr.execute("""
+        INSERT INTO account_account_res_company_rel (account_id, company_id)
+        SELECT a.id, c.id
+        FROM account_account a
+        CROSS JOIN res_company c
+        WHERE a.company_id = 2
+          AND c.id != 2
+          AND NOT EXISTS (
+              SELECT 1 FROM account_account_res_company_rel r 
+              WHERE r.account_id = a.id AND r.company_id = c.id
+          )
+          AND NOT EXISTS (
+              SELECT 1 FROM account_account a2 
+              WHERE a2.company_id = c.id
+          )
+        ON CONFLICT DO NOTHING
+    """)
+    
+    # Set a dummy chart template for branches to satisfy Odoo 19 POS validation
+    env.cr.execute("""
+        UPDATE res_company 
+        SET chart_template = 'id' 
+        WHERE id != 2 AND chart_template IS NULL
+    """)
+
+def _cleanup_shared_accounts_uninstall(env):
+    """
+    Remove the shared account relations upon uninstallation to prevent 
+    UserErrors when Odoo's standard company consistency checks are restored.
+    """
+    env.cr.execute("""
+        DELETE FROM account_account_res_company_rel
+        WHERE company_id != 2
+          AND account_id IN (SELECT id FROM account_account WHERE company_id = 2)
+    """)

__manifest__.py

@@ -15,4 +15,6 @@ This module removes the standard restriction that prevents Chart of Accounts (CO
     'installable': True,
     'application': False,
     'license': 'LGPL-3',
+    'post_init_hook': '_auto_share_accounts_post_init',
+    'uninstall_hook': '_cleanup_shared_accounts_uninstall',
 }