htmlviewer-directediting: HTML rendering in Nextcloud iOS app

- htmlviewer: IEditor + Bridge + srcdoc iframe template + content controller
- text app: open() bridges text/html to htmlviewer template
- idempotent install.sh for re-deployment after app updates
- iPhone-tested 2026-09-11

testde.php

@@ -0,0 +1,10 @@
+<?php
+echo "start\n";
+require "/var/www/html/lib/base.php";
+echo "base ok\n";
+$m = \OC::server->get(\OCP\DirectEditing\IManager::class);
+echo "manager ok\n";
+$ev = new \OCP\DirectEditing\RegisterDirectEditorEvent($m);
+\OC::server->get(\OCP\EventDispatcher\IEventDispatcher::class)->dispatchTyped($ev);
+echo "dispatched\n";
+var_dump(array_keys($m->getEditors()));