fix(ui): reset War Room to idle when a hunt is declined or aborted

[psigho]

What

A declined-approval hunt ("hunt not started") — or hitting the red-X abort — left the War Room stuck advertising an active run:

• the ENGAGE button stayed on the ENGAGING… spinner and disabled,
• the LIVE fidelity banner kept claiming "real tools probing the target",
• the narration rail kept showing "Looking at your target — finding the attack surface".

Nothing was actually running (the hunt never started), so this was a purely cosmetic-but-alarming stuck state.

Why

completeMission() only toggled the button's display, never restoring its label / disabled / opacity, and never cleared the fidelity banner or narration rail. abortMission() had the same gap and no-op'd entirely when missionRunning was already false — so the red X did nothing after a declined hunt.

Fix

Add resetEngageUI() — restores the ENGAGE button (▶ ENGAGE, enabled) and clears the fidelity banner (setFidelity('off')) + narration rail. Route both completeMission() and abortMission() through it, and let the red X clear a leftover engaging/probing UI even when missionRunning is already false.

Client-side only (docs/index.html); no behavior change to an actually-running mission. Verified by simulating the stuck state and confirming both the decline and abort paths reset the button, banner, and rail.

[jmagly]

Looks good — this fixes a real stuck-button bug. startMissionFromDashboard sets ENGAGE to a disabled ENGAGING… spinner with no finally, so the decline path (completeMission('approval declined')) left it stuck; resetEngageUI() restores it and correctly covers both the decline and abort paths without touching timers or missionRunning. One cosmetic nit: the new abort-idle branch sets cmdMissionName='STANDBY' but leaves cmdMissionStatus unchanged, so the header can read STANDBY with a stale red "approval declined" substatus — worth clearing that too. Non-blocking.

[jmagly]

Re-reviewed current head d43c405. The follow-up commit clears the stale idle substatus in the red-X/no-running-mission path, so the previous nit is addressed.

This patch is scoped to the War Room UI reset paths and does the right thing: completeMission() restores the ENGAGE button and clears the fidelity/narration indicators, while abortMission() can now clean up leftover UI even when missionRunning is already false after a declined hunt. I also extracted the inline scripts from docs/index.html and ran node --check; no syntax errors found.

Approved.