Fix rule filename not updating when action changes

When editing a rule and changing its action (e.g. deny → allow),
the JSON content updates correctly but the rule name (used as
filename) retains the old action prefix, causing a mismatch
between the filename and the actual rule action.

Update save_rule() to detect auto-generated rule names and
replace the action prefix when the action has changed.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

ui/opensnitch/dialogs/ruleseditor/dialog.py

@@ -894,5 +894,13 @@ class RulesEditorDialog(QtWidgets.QDialog, uic.loadUiType(DIALOG_UI_PATH)[0]):
 
         if self.ruleNameEdit.text() == "":
             self.rule.name = slugify("%s %s %s" % (self.rule.action, self.rule.operator.type, self.rule.operator.data))
+        elif self._old_rule_name is not None:
+            # If the rule name was auto-generated (starts with an action prefix),
+            # and the action has changed, update the prefix to match the new action.
+            for old_action in (Config.ACTION_ALLOW, Config.ACTION_DENY, Config.ACTION_REJECT):
+                if self._old_rule_name.startswith(old_action + "-") and old_action != self.rule.action:
+                    self.rule.name = self.rule.action + self._old_rule_name[len(old_action):]
+                    self.ruleNameEdit.setText(self.rule.name)
+                    break
 
         return True, ""