fix: restore audited current-year research coverage

[barretlee]

Summary

• fix the research impact gate so current-year work can qualify through time-bounded direct-source evidence without weakening mature-paper citation thresholds
• add seven official 2026 research milestones and shadow observation for Microsoft Research and Google Research feeds
• publish the v0.11.1 changelog, research coverage guardrails, monthly cap alignment, and mobile trend-card fix

Validation

• npm run check
• npm run build
• npm run release:check
• git diff --cached --check