Bam 0.13.0 — overscroll Space creation

Create Spaces the Arc way: overscroll past your last Space to fill a circled plus, then release into a sidebar creation panel with a name field, profile picker and all eight theme appearances (including Prism and Clear) live-previewing the Space gradient. Partial pulls spring back; Escape, Cancel or any Space change dismisses without creating.

All 13 component suites and 9 native runtime suites pass. See CHANGELOG.md and VALIDATION.md for details and known limitations.