Refine four-study research narrative

[jinlx]

Summary

• replace the Research page with a four-study narrative: emissions, evolving chemistry, furanoid mechanisms, and downwind health risks
• use paper-grounded quantitative findings and consistent question, approach, finding, implication, and publication fields
• incorporate the regional ozone/CMAQ extension as the current direction of the smoke-chemistry study
• remove redundant standalone methodology sections on aging, ozone isopleths, and satellite transects

Why

The previous page mixed research themes, study summaries, and methods. This revision gives readers a clear scientific story from wildfire emissions to chemistry, targeted model development, and community exposure.

Impact

The page is easier to scan while preserving the methodological and publication context needed to substantiate each study.

Validation

• reviewed the one-file diff and complete rendered Markdown structure
• checked formatting and whitespace
• cross-checked the key quantitative claims against the cited publications
• the repository's Site checks workflow will perform the full Jekyll build and internal-link check

The unlinked manuscript PDF label is intentionally not included.