fix: add user-facing warnings for remaining silent failures

- preflight_saveKey: warn user if license key could not be preserved
- createDefaultScheduledTask: warn user to create task manually
- migrateDefaultBackupDir: warn user to review profile settings
- createBackupDirectory: warn if .htaccess protection file fails
- boot(): widen catch to \Exception for consistency

source/script.php

@@ -103,6 +103,11 @@ class Pkg_MokoSuiteBackupInstallerScript
 			}
 		} catch (\Exception $e) {
 			error_log('MokoSuiteBackup: Could not save download key: ' . $e->getMessage());
+			Factory::getApplication()->enqueueMessage(
+				'MokoSuiteBackup could not preserve your download/license key before the update. '
+				. 'Please verify your license key is still configured in System → Update Sites after this update completes.',
+				'warning'
+			);
 		}
 	}
 
@@ -213,7 +218,14 @@ class Pkg_MokoSuiteBackupInstallerScript
 		$htaccess = $backupDir . '/.htaccess';
 
 		if (!file_exists($htaccess)) {
-			file_put_contents($htaccess, "Order Deny,Allow\nDeny from all\n");
+			if (file_put_contents($htaccess, "Order Deny,Allow\nDeny from all\n") === false) {
+				error_log('MokoSuiteBackup: Failed to write .htaccess to ' . $backupDir);
+				Factory::getApplication()->enqueueMessage(
+					'MokoSuiteBackup created the backup directory but could not write an .htaccess file to protect it. '
+					. 'Please manually create <code>' . htmlspecialchars($htaccess) . '</code> with "Deny from all" to prevent direct web access.',
+					'warning'
+				);
+			}
 		}
 
 		$indexHtml = $backupDir . '/index.html';
@@ -262,6 +274,11 @@ class Pkg_MokoSuiteBackupInstallerScript
 			}
 		} catch (\Exception $e) {
 			error_log('MokoSuiteBackup: migrateDefaultBackupDir() failed: ' . $e->getMessage());
+			Factory::getApplication()->enqueueMessage(
+				'MokoSuiteBackup could not automatically migrate backup directory settings in your profiles. '
+				. 'Please review your backup profiles and ensure the backup directory is set correctly.',
+				'warning'
+			);
 		}
 	}
 
@@ -322,6 +339,11 @@ class Pkg_MokoSuiteBackupInstallerScript
 			$db->insertObject('#__scheduler_tasks', $task);
 		} catch (\Exception $e) {
 			error_log('MokoSuiteBackup: createDefaultScheduledTask() failed: ' . $e->getMessage());
+			Factory::getApplication()->enqueueMessage(
+				'MokoSuiteBackup could not create the default scheduled backup task. '
+				. 'Please create a scheduled task manually in System &rarr; Scheduled Tasks to enable automated backups.',
+				'warning'
+			);
 		}
 	}