Leaving the Files list for another section unmounted the page and lost
the loaded grid, cursors and scroll position; returning refetched page 1
from the top. A new in-memory section cache snapshots that state on
departure (beforeNavigate) and rehydrates it on the next mount when the
sort/filter still match, reapplying the scroll offset after the grid
paints. Combined with the navbar remembering the section URL, tapping
back into Files lands you exactly where you left off. The snapshot is
session-only, validated by resetKey, and skipped for in-page query
changes and the shallow-routed viewer.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
H1K0
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