[Noisemaker111]

Cuts 0.38.0 so games can adopt the real game menu, the single-object variant fix and the session-loop base.

Base: origin/beta 04059dba; check-release-ancestor ok (release commit contains beta).

Carried merges, each an ancestor of this commit:

• Real game menu: c522c3ea (PR A game menu replaces the HTML panel: living background, detail pane, save cards #2317) - GameMenu/GamePauseMenu on HUD tokens, GameMenuSound state, slot grid, Continue pane
• Single-object variant fix: 60e4c455 (PR A prop placed at runtime switches its model variant levels #2340) - runtime-placed props honour ModelConfig.variants, not just batched ones
• Session-loop base: 04059dba (PR Note the session loop in the unreleased changelog #2341) - createSessionLoop, createRunLoop kept as a deprecated composition
• pr:sweep verdict fix: 4472c80f - judgeChecks reads each PR's current attempts, not raw rows

Stated in the changelog rather than hidden: the session loop seeds its option draw under :offer: instead of :run:, so one seed produces a different change on a given session than 0.37.0 did. Ids, payloads and saves stay valid; a saved changeId restores the same change.

Not included: the menu-cosmetics fix (equal slot-card widths, a surface behind the nav verbs) had no PR open at the cut, so it lands in 0.38.1.

• Versions: lockstep SDK 0.38.0, CLI jgengine 0.35.0, @jgengine/github 0.25.0
• CHANGELOG.md + typed mirror carry the 6 folded fragments; changes/ emptied; api.md regenerated

Prevention: none - version-only release cut; changelog.ts is the generated mirror of CHANGELOG.md and changes no behavior

Verification: check-release-ancestor ok · check-release-set ok (13 packages) · check-version ok · ship:preflight ok