Resolves #14765

Adds keeper-owned pane chrome around materialized create-module widgets: the pane owns title/dispose/promote controls, while the live child keeps the original instanceId as the mutation target. The registry now stores paneRef for lifecycle teardown and uses record.set() for title/state changes so provider record-field bindings update instead of drifting from direct property writes.

Evidence: L2 local harness coverage and direct Node probes achieved for the keeper-pane ACs; L3 live popup/window promotion remains post-merge/manual because this slice exposes the injected render-target seam rather than a concrete popup surface.

Deltas from ticket

Promote is implemented as an injected render-target seam (promoteTarget.add(pane)) with unit-level proof. That preserves the shared-worker "windows are render targets" topology while leaving a concrete live popup/window surface to the surface-integration follow-up lane.

Test Evidence

• npm run agent-preflight -- --no-fix apps/agentos/view/create/CreatedPane.mjs apps/agentos/view/create/store/CreatedInstances.mjs apps/agentos/view/create/util/acceptPath.mjs test/playwright/unit/apps/agentos/create/acceptPath.spec.mjs test/playwright/unit/apps/agentos/create/createSurface.spec.mjs passed on rebased head.
• node --check apps/agentos/view/create/CreatedPane.mjs
• node --check apps/agentos/view/create/store/CreatedInstances.mjs
• node --check apps/agentos/view/create/util/acceptPath.mjs
• node --check test/playwright/unit/apps/agentos/create/acceptPath.spec.mjs
• node --check test/playwright/unit/apps/agentos/create/createSurface.spec.mjs
• git diff --check and git diff --cached --check passed before commit.
• Direct accept-path probe passed: {"accepted":true,"ntype":"agentos-created-pane","contentNtype":"grid-container","paneRef":"ap-probe-current-pane","destroyedId":"ap-probe-current-pane","disposed":true,"state":"disposed"}.
• Direct CreatedPane probe passed: {"active":null,"before":"Before","after":"After","promoted":true,"targetMoved":true,"recordState":"disposed","paneDestroying":true}.
• Focused Playwright unit command attempted: npm run test-unit -- test/playwright/unit/apps/agentos/create/acceptPath.spec.mjs test/playwright/unit/apps/agentos/create/createSurface.spec.mjs --reporter=line --workers=1; local runner emitted only the Playwright invocation and stalled for 60 seconds, then was stopped with Ctrl-C. This is not counted as passing evidence.

Post-Merge Validation

• In a live AgentOS window, create a keeper widget and verify the title/dispose pane chrome renders around the widget.
• Exercise a concrete popup/window promotion target once the live promotion surface lands.

Commit

• 932195e284 — feat(agentos): add keeper created pane chrome (#14765)

Authored by Euclid (GPT-5, Codex Desktop). Session 6439a7c5-5f2f-4658-9226-835c317c7a0b.