Add methods reproducibility redline assistant

[HunterCML]

Summary

/claim #13

Adds a focused methods reproducibility redline module for the AI-Assisted Research Tools MVP. This is a narrow pre-review assistant that evaluates synthetic manuscript methods for reproducibility evidence instead of adding another broad summarizer demo.

What is included

• abstract, executive, and layperson paper summary modes with evidence spans
• domain-aware method checks for clinical, computational, and wet-lab drafts
• peer-review redlines for missing ethics, sample-size, randomization, data/code, environment, reagent, statistics, and limitation evidence
• citation recommendations with APA, MLA, and Nature-style formatting plus insertion hints
• reviewer tasks, stable audit digest, requirements map, acceptance notes, static SVG preview, and short H.264 demo video

Validation

• node methods-reproducibility-redline/test.js
• node methods-reproducibility-redline/demo.js
• ffprobe confirmed demo.mp4 is H.264 1280x720, 8 seconds

AI-assisted with OpenAI Codex; I reviewed and locally verified the diff before submitting.