fix: final review minors m-1 to m-8

- m-1: the no-change Divi result carries preview_url/edit_url too
- m-2: overview names replace-text's per-page tree_rev
- m-3: divi-shortform documents validation_failed vs not_found for unknown IDs
- m-4: DiviWriter/DiviPageLoader final (no mocks left), neutral NewDraft
  log detail, snapshots are Etappe 4
- m-5: Tested up to 7.1, changelog completed
- m-6: content-create warns when the extras changed the stored layout
- m-7: deleting a whole section outlines nothing instead of the next one
- m-8: uninstall removes the user meta lit_mcp_log_per_page; readme lists it

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01At3V6SjwbMe6eMzVGW3Hs7

tests/Unit/UninstallerTest.php

@@ -8,6 +8,7 @@ use Brain\Monkey\Functions;
 use LIT\MCP\Abilities\ExposurePolicy;
 use LIT\MCP\Access;
 use LIT\MCP\Admin\ConnectionStatus;
+use LIT\MCP\Admin\LogTab;
 use LIT\MCP\ChangeLog\ChangeLogCleanup;
 use LIT\MCP\ChangeLog\ChangeLogInstaller;
 use LIT\MCP\Limits;
@@ -37,6 +38,8 @@ final class UninstallerTest extends TestCase
         Functions\expect('restore_current_blog')->never();
         Functions\expect('delete_transient')->once()->with(ConnectionStatus::ENDPOINT_TRANSIENT);
         Functions\expect('wp_clear_scheduled_hook')->once()->with(ChangeLogCleanup::HOOK);
+        // Review m-8: the Protokoll screen option is user meta (network-wide): removed once.
+        Functions\expect('delete_metadata')->once()->with('user', 0, LogTab::PER_PAGE_OPTION, '', true);
         $deleted = [];
         Functions\when('delete_option')->alias(static function (string $option) use (&$deleted): bool {
             $deleted[] = $option;
@@ -62,6 +65,7 @@ final class UninstallerTest extends TestCase
         Functions\expect('restore_current_blog')->twice();
         Functions\expect('delete_transient')->twice()->with(ConnectionStatus::ENDPOINT_TRANSIENT);
         Functions\expect('wp_clear_scheduled_hook')->twice()->with(ChangeLogCleanup::HOOK);
+        Functions\expect('delete_metadata')->once()->with('user', 0, LogTab::PER_PAGE_OPTION, '', true);
         Functions\when('delete_option')->justReturn(true);
 
         Uninstaller::run();