fix: make Control Room attention state truthful

[wolverin0]

Summary

• include mirrored blockers, decision flags, and open questions in Needs Attention
• render blocker, gate, next action, acceptance, and evidence on cards and detail
• persist new contract/correlation context and surface pane metadata
• show a loud live-updating bridge stalled/error warning

Verification

• 14 controller/API tests, 116 assertions, 0 failures/errors
• focused Control Room system flow, 9 assertions, 0 failures/errors
• RuboCop: 5 files, no offenses

Scope

T-0028 / claw-xe1. No schema, auth, deployment, or legacy executor changes.