Loading spinner on launch; keep prior pins during viewport fetches#4
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Two map UX tweaks: - Overlay an ActivityIndicator while we're waiting on the initial position fix so the 1–2s of dead air before the fly-to no longer looks like the app froze. - Accumulate elements across viewport fetches into a Map<id, Element> and render from that, so previously-shown pins stay on the map while a new bounds fetch is in flight. Fine for our small per-user dataset. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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Summary
ActivityIndicatoroverlay while we're waiting on the initial position fix, so the 1–2s before the fly-to no longer feels like a hang.Map<id, Element>; render from that union so previously-shown pins stay on the map while a new bounds fetch is in flight. Fine for our small per-user dataset — revisit if we ever need eviction or to reflect server-side deletes.Test plan
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