Gameplay: add Worker inspection art and UI shell

[ael-dev3]

Summary

This is the focused Worker UI/art slice stacked on PR #68 (agent/four-worker-realm-system). It adds the supplied high-resolution Worker illustration to the established same-origin inspection-panel pattern.

Included

• Adds public/images/realm/hegemony-worker-record.webp, a deterministic transparent WebP derivative of the owner-supplied PNG.
• Records source and runtime hashes, alpha bounds, authorization scope, and provenance in docs/reference/resources/2026-07-19-hegemony-worker/record-art/.
• Adds a reproducible installer and registers the runtime asset in the exact asset verifier.
• Adds WorkerInspectionPanel with responsive art staging, focus-safe close behavior, public worker status/origin/assignment fields, and owner-only server callback boundaries for collect/recall.
• Keeps other keepers read-only and never renders caller-only cargo for them.

Deliberate boundary

This PR does not add generic worker tables, subscriptions, reducers, roster activation, worker seeding, dispatch settlement, or legacy expedition-to-worker mapping. The panel is a presentational shell that is ready for validated generic worker rows; it does not invent worker state. PR #68 remains the scene-stability slice, and this PR must be reviewed/merged in stack order.

Validation

• verify-license-policy.mjs
• verify-file-sizes.mjs
• verify-runtime-assets.mjs (41 exact runtime assets)
• TypeScript project build
• Focused Worker panel tests: 2 passed
• Full Vitest suite: 182 files / 1,640 tests passed
• Production Vite build
• verify-production-dist-exclusions.mjs

No merge or deployment is requested by this PR.

[ael-dev3]

Reviewed during Alpha 0.3.12 integration. This standalone Worker inspection shell was intentionally not shipped because it was disconnected from the live gameplay authority and would add UI without a usable loop. Closing it rather than carrying dead presentation code forward.