fix: sticky plan footer + TeamPage cold-start race + capture plan beat fixes

[sabbour]

Summary

Fixes three capture blockers and two UI regressions found during the blueprint demo capture run.

UI fixes

• OutcomePlanPanel (OutcomePlanPanel.tsx): adds onFooterChange prop so hosts can pin the Confirm plan / Clarify plan action row outside the scrollable SlidePanel body. Previously the footer scrolled out of view on long specs.
• SlidePanel (SlidePanel.tsx): adds optional ooter prop — renders a sticky non-scrolling footer below the body.
• CoordinatorRunPage (CoordinatorRunPage.tsx): wires onFooterChange → planFooter state → SlidePanel ooter so the Confirm plan button is always visible.
• TeamPage (TeamPage.tsx): fixes cold-start race where \Project agents\ panel never rendered within the old 20s timeout.

Capture plan fixes (\�lueprint-demo.capture.json)

• Beat 1.3: adds Agents heading waitFor before \getByLabel('Project agents'); raises timeout 20s→60s.
• Beat 2.2: adds
  un-summary-chip-goal\ click to open the Outcome plan SlidePanel (was never opened — button never in DOM); adds scrollIntoView before Confirm plan; raises Confirm plan waitFor 60s→120s.
• Beat 2.5: raises \ollowNewPage\ timeout 15s→60s (sandbox startup can exceed 15s post-OOM fix).

Related

• Closes capture blocker: beats 1.3, 2.2, 2.5 timing out
• Companion to fix(sandbox): raise agentweaver-exec memory limit 2Gi→4Gi to prevent preview server OOM #931 (sandbox OOM fix — merged)

Test plan

• 
  pm run test:web\ — OutcomePlanPanel + SlidePanel unit tests pass
• Beat 2.2 capture: plan panel opens, Confirm plan visible, click succeeds
• Beat 2.5 capture: preview opens in new tab, followNewPage completes