Redesign progressive globe: side panel + global data + info-only clicks

- Side-by-side layout: globe left, live info panel right (always visible)
- Load full H3 files globally (no viewport filtering) — no gaps when panning
- Click shows cluster info + nearby samples in side panel (no camera fly-to)
- Zoom watcher switches resolution automatically: res4 → res6 → res8
- Stats, legend, cluster card, and sample list all in side panel

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: rdhyee