[pomponchik]

Adds the September and October 2026 mutation-testing digests and complete Russian translations.

Both posts follow the existing mt-state-<month>-2026 leaf-bundle layout, the-mutation-testing-digest-for-<month>-2026 URLs, author and publication-date conventions. English bodies are preserved from the supplied drafts; Russian translations keep shared metadata in the canonical index.md.

The stationary-pointer resize regression now advances the animation clock while polling. A native resize notification arriving after the initial clock advance otherwise leaves the gaze frozen during the assertion. The existing thresholds and behavior checks are preserved.

Validation:

• Production Hugo build and HTTP client lint: passed.
• SEO contracts: 12 passed.
• Blog, latest posts, multilingual and author tests: 101 passed.
• Brand regressions: 105 passed (three repetitions across all five browser configurations).
• Verified all 281 source links, section/list/table structure, code spans and numeric values against the translations.
• Verified all four English/Russian article pages at 375px and 1440px in Chromium, including table rendering and page overflow.