feat(career): passport visuals pack — tilt, emerging ink, gold foil (#944)

* feat(career): passport visuals pack — tilt, emerging ink, gold foil

Career v2, WS4. All CSS + a rAF-throttled pointer handler, no deps:

- Trading-card tilt on EARNED artifacts only (shelf covers + the badge
  page stamp): pointer-tracked perspective rotateX/Y with a glint sweep
  following the pointer. The cover's jitter rotation moves into a CSS
  var so the tilt transform composes with it; the blanket cover-hover
  translate is scoped :not(.pp-tilt) so it can't fight the tilt.
  Hover-capable pointers only; off under prefers-reduced-motion.
- Emerging-stamp ink: the ghost stamp fills by qualifying/required via
  a conic-gradient — the stamp visibly carves in, no numbers added.
- Gold foil preview: the "coming" note gains a dashed foil chip with a
  periodic shimmer — honest, never earnable-looking.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

* fix(career): tilt rAF race + freshly-slammed stamp becomes a card

CodeRabbit on #944: a queued tilt frame closed over the departed card
and re-applied vars after pointerleave; and the just-slammed stamp
never regained pp-tilt until the next open.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

---------

Co-authored-by: Claude Fable 5 <noreply@anthropic.com>

CHANGELOG.md

@@ -38,6 +38,12 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
   top-tier clean pass in one key (`keysCleared`), any depth rung, or
   mastery — rather than only the maxed-speed depth flips. Genres without a
   curated drill stay songs-only.
+- **Career passport visuals pack** — earned covers and badge stamps become
+  trading cards (pointer-tracked tilt + light glint, hover-capable devices
+  only); the ghost stamp visibly "carves in" as qualifying songs land (a
+  conic ink fill, no numbers added); the Gold rung preview is a small foil
+  chip with a shimmer sweep, still honestly labeled coming. All theatrics
+  disabled under `prefers-reduced-motion`.
 - **Career passports (backend)** — the badge-journey layer on top of career stars.
   New career-plugin endpoints: `GET /api/plugins/career/passports` (per-instrument
   passport walls: genre badges computed on read from `song_stats` × the library's