Career v3: Gold tier — verified improv upgrades an earned badge (#960)

* feat(career): Gold tier — a family-style goldImprov artifact upgrades an earned badge

The drill-state relay's goldImprov map (virtuoso gold_improv mints,
gained-only merged like drill nodes) turns an earned badge gold when the
passport's genre — or its genre family — has a verified improv artifact.
Gold never substitutes for the badge bar: gold-without-bronze stays
in_progress.

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

* feat(career): Gold tier frontend — relay, ceremony, slam, gold ink everywhere

The drill-state relay now carries virtuoso's goldImprov map; a badge that
comes back gold gets its own ceremony + notification (tier-suffixed seen
ids — the bronze moment stays seen under its legacy id, a gold slam marks
both), a gold stamp slam in the book, gold ink on the shelf-cover mini
stamp, and the real gold foil chip. The bronze page's dashed 'Gold rung
coming' preview becomes a live invitation to jam the style in Virtuoso.

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

* fix(career): gold review fixes — family-space style matching, intake guards, rail counter

The review's showstopper: virtuoso mints goldImprov under raw
STYLE_PALETTES ids ('punk', 'djent', 'disco'), which are mostly NOT
family keys — the tier check now matches in family space (artifact style
and passport genre bucket through the same _genre_family keyword match),
so a 'punk' gold reaches a 'punk rock' passport. Also: non-dict
goldImprov 400s loudly instead of silently dropping; evidence-free
artifacts (no verifier) never mint; goldImprov gets the same pre-merge
size bound byNode has (junk under the cap could otherwise persist
forever and wedge every later relay at the post-merge check); the
instrument-rail badge counter counts gold (earning gold no longer made a
badge vanish from the rail); first-artifact-wins is now asserted against
the persisted snapshot instead of vacuously.

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

---------

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

CHANGELOG.md

@@ -8,6 +8,13 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ## [Unreleased]
 
 ### Added
+- **Gold tier (career passports)** — an earned badge turns **gold** when
+  Virtuoso verifies an improvised jam in the passport's style (the
+  `gold_improv` artifact relays with the drill snapshot; a genre inherits its
+  family's style, gained-only, and gold never substitutes for the badge bar
+  itself). Gold gets its own ceremony, stamp slam, foil chip, and gold ink on
+  the shelf cover, profile wall, and passport card; the bronze page's "Gold
+  rung coming" preview becomes a live invitation to jam it.
 - **Gigs (the career verb, frontend)** — book a gig from any opened passport:
   a gig poster proposes the setlist (re-roll for a different bill; save or
   copy the poster as a PNG), "Play the gig" hands the set to the play queue