docs(tutorials): fact-check against MODX 3.x, rewrite examples, en/ru sync

[Ibochkarev]

Audit of en/extending-modx/tutorials/** against modxcms/revolution 3.x, an editorial pass, and an en/ru sync.

Findings: 132 — 10 PHANTOM, 48 STALE, 9 ORPHAN, 43 UNDOCUMENTED, 22 UNVERIFIABLE. 129 closed; the rest are historical claims that cannot be checked in the working copy.

The section was written for 2.x and no longer ran. Several examples fataled on 3.x, and the CMP described by part 2 was unreachable as written.

Examples that did not run

• new modPackageBuilder($modx) — no such global class in 3.x, the script dies on line one. Replaced with the Composer-autoloaded MODX\Revolution\Transport\modPackageBuilder; the modx.class.php bootstrap and loadClass() calls are gone.
• xPDO schema: in the 3.x generator package becomes a PHP namespace and version="1.0" skips PSR-4 registration, so getCollection('Doodle') returned null and count() threw. Rewritten with package="Doodles\Model", version="3.0", namespaced base and related classes, and the model generated into src/Model/.
• mgr/doodle/getList against a file named getlist.class.php: MODX builds the processor path without lowercasing the case, so it works on macOS and fails on Linux. File names now match the action, with a warning explaining why.
• The category file resolvers were attached after putVehicle(), which copies the vehicle into the package — they were silently dropped and nothing arrived on install. Reordered, with a warning.

Facts

• $modx->getService() is deprecated and scheduled for removal; the snippet now takes the service from the container, registered in bootstrap.php.
• The doodles.core_path / doodles.assets_url system settings chapter is replaced by the Namespace record, which is what bootstrap.php and the resolver read.
• modAction and the integer ?a=2 routing no longer exist; the menu item plus namespace and action name is the route, and the controller lookup order is documented.
• Connector auth: the modAuth / HTTP_MODAUTH value is a per-user, per-context session token, not $modx->siteId.
• Processors use MODX\Revolution\Processors\Model\* and a namespaced $classKey.
• The build script produces doodles-1.0-beta4.transport.zip; the menu vehicle gained permissions (an empty list leaves the item visible to every manager user) and an HTML icon, and PRESERVE_KEYS is explained as a SQL Server-only flag.
• custom-manager-fields: OnFormRender does not exist — removed, replaced with the table of manager form events.
• using-custom-database-tables: field lists match the schema again, xPDO paths corrected, version="3.0" documented, plus warnings for the two silent failures (bootstrap.php running before the Context exists, and Could not load package metadata).

Editorial pass

Prose cut by roughly a third, reference data moved into tables, examples trimmed to what the code actually reads. ru synced: same structure, code and facts.

Illustrations

Ten media briefs were collected. The existing screenshots are from the 2.x manager — "System" menu instead of "Admin", "Create New" instead of "Create", "Permission" instead of "Permissions" — and are listed in .temp/docs-review/media-todo.md for re-shooting.