fix(gamedata): never cache a missing gamedata file

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A missing gamedata file got no Cache-Control at all, because add_header
without `always` only applies to 2xx/3xx. Cloudflare then fell back to the
zone setting "Browser Cache TTL = 1 year", so the 404 came back as
`max-age=31536000` with `cf-cache-status: HIT` — pinned in the visitor's
browser and at the edge. An icon requested while its import was still
running stayed a 404 for the rest of the year, even after the file existed.
That was the "some icons load, some don't" report.

Give every gamedata location a named 404 handler that sends no-store, and
split icons/ out as its own cache class: those files are rewritten under
the same name (repair-icons, reimport), so an hourly must-revalidate keeps
a repaired icon visible within the hour instead of days later.

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openhands committed 2026-10-01 18:00:36 +02:00

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deployment/proxy/nginx-cms.conf

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