Add real actions to the miner-ui

[JSONbored]

Problem: The miner-ui is 100% read-only today — there's no way to release a claim, requeue an item, or pause the governor from the UI itself.

Area: AMS / Miner UI

Proposal: Add actions to the UI backed by the CLI-equivalent operations (release/requeue from the portfolio-queue escape hatch above, pause/resume from the governor control surface above).

Deliverables:

• Working release/requeue/pause controls in the miner-ui.

Boundaries:

• Depends on the underlying CLI capabilities existing first (the portfolio-queue escape hatch and governor pause/resume issues above).

Design system: the new action controls (buttons etc.) must use the shared design-system package's components from #4966/#4967, not raw hardcoded styling.

Scope note: this issue is limited to wiring UI controls to the already-existing CLI-equivalent release/requeue/pause/resume operations. It must not implement or modify the underlying claim-conflict resolution logic or the governor's own decision-to-proceed logic — those stay maintainer-only.

[linear-code]

JSO-3517