v0.4.0 — Entity setup wizard

In-dashboard entity setup wizard

Configure which entities a dashboard shows without touching code.

• A setup wizard and entity picker built into the aria, grid and pulse templates.
• Per-dashboard entity config stored in Home Assistant so it survives restarts, via the new useGhConfig hook and a slots system the templates read from.
• Generated per-template READMEs and a new "Configure entities" guide.

Also includes the 0.3.x work: the Manager panel re-skinned 1:1 to the live glasshopper.dev design system (real brand mark, recessed glass panels, green CTAs).

To update: bump Glasshopper to 0.4.0 in HACS, restart Home Assistant, then hard-refresh.

Full changelog: v0.3.5...v0.4.0