Fix sqlite_import() to handle CREATE TRIGGER and CREATE VIEW in dumps

sqlite3 .dump also outputs CREATE TRIGGER and CREATE VIEW statements
without IF NOT EXISTS, causing re-import to fail with "already exists".

Extend the transformations to add IF NOT EXISTS to all CREATE
statements (TABLE, TRIGGER, VIEW, INDEX, UNIQUE INDEX) using regex,
so that re-importing a dump into the same database succeeds.

Co-authored-by: swissspidy <841956+swissspidy@users.noreply.github.com>

Author: Copilot

src/DB_Command_SQLite.php

@@ -425,8 +425,10 @@ protected function sqlite_import( $file, $assoc_args ) {
 		// Ignore errors about unique constraints and existing indexes.
 		$contents = str_replace( 'INSERT INTO', 'INSERT OR IGNORE INTO', $contents );
 		$contents = preg_replace( '/\bCREATE TABLE (?!IF NOT EXISTS\b)/i', 'CREATE TABLE IF NOT EXISTS ', $contents );
-		$contents = str_replace( 'CREATE INDEX "', 'CREATE INDEX IF NOT EXISTS "', $contents );
-		$contents = str_replace( 'CREATE UNIQUE INDEX "', 'CREATE UNIQUE INDEX IF NOT EXISTS "', $contents );
+		$contents = preg_replace( '/\bCREATE TRIGGER (?!IF NOT EXISTS\b)/i', 'CREATE TRIGGER IF NOT EXISTS ', $contents );
+		$contents = preg_replace( '/\bCREATE VIEW (?!IF NOT EXISTS\b)/i', 'CREATE VIEW IF NOT EXISTS ', $contents );
+		$contents = preg_replace( '/\bCREATE INDEX (?!IF NOT EXISTS\b)/i', 'CREATE INDEX IF NOT EXISTS ', $contents );
+		$contents = preg_replace( '/\bCREATE UNIQUE INDEX (?!IF NOT EXISTS\b)/i', 'CREATE UNIQUE INDEX IF NOT EXISTS ', $contents );
 
 		$import_file = tempnam( sys_get_temp_dir(), 'temp.db' );
 		file_put_contents( $import_file, $contents );