Fix 19hz page loading funcheap cached data

[Copilot]

Both pages share the same origin (funcheapsfmap.com), so they share localStorage. The 19hz page was reading funcheap event data from cache because both map.js and 19hz/map.js used identical keys (events, events_age).

Change

Renamed localStorage keys in 19hz/map.js to be namespace-scoped:

// Before
window.localStorage.getItem('events')
window.localStorage.setItem('events_age', ...)

// After
window.localStorage.getItem('19hz_events')
window.localStorage.setItem('19hz_events_age', ...)

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[github-actions]

PR Preview Action v1.8.1
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2026-03-19 07:07 UTC