fix(ci): format migrated comps with oxfmt, sync skills manifest

CI failures were two root causes (preview-regression was a cascade — its gate
mirrors preview-parity, which was skipped because the Preflight lint+format job
failed):

- Preflight (lint + format): the migrated registry comps (flowchart,
  flowchart-vertical, liquid-glass-notification, vignette demo) were committed
  unformatted — the lefthook format step only ran oxfmt on staged TS, not HTML,
  so `oxfmt --check .` failed in CI. Ran oxfmt on all four. The vignette title's
  per-glyph spans use oxfmt's `</span>`-split form, which keeps the glyphs
  adjacent (no inter-element whitespace), so rendering is unchanged.
- Skills: manifest in sync: the pre-commit hook's manifest generator and CI's
  canonical `gen-skills-manifest.ts` produced different content hashes for the
  same skill; regenerated with the canonical generator so the committed manifest
  matches what CI computes.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

skills-manifest.json

@@ -18,7 +18,7 @@
       "files": 1
     },
     "hyperframes-animation": {
-      "hash": "a23faee17396c153",
+      "hash": "c9bbeb7e68c5854d",
       "files": 115
     },
     "hyperframes-cli": {