Summary

Extends the host-interface smoke test added in #2495 to cover the five
additional interfaces flagged in #2496 — PollingHost, ChatHost, ScrollHost,
SettingsHost, and CompactionHost. No production code changes.

Audit result

All required fields of every audited interface are already present on
RemoteClawApp. The class is structurally compliant — no field
initializers needed restoration.

Verification:

• ./node_modules/.bin/tsgo -p tsconfig.json exits 0 with zero output on
  the current tree.
• Sanity check: removing @state() chatMessage = ""; from app.ts:140
  triggered 30+ tsgo errors including
  Property 'chatMessage' is missing in type 'RemoteClawApp' but required in type 'ChatHost'
  across app-chat.ts and app-gateway.node.test.ts — confirming the
  structural checks enforced after refactor(ui): remove as unknown as Parameters<typeof X>[0] casts — restore structural type-checking #2494 are active.
• Second sanity check: removing nodesPollInterval: number | null = null;
  from app.ts:312 was caught by the new PollingHost + SettingsHost
  smoke assertions with clear per-interface labels.

This matches the prediction in #2496's own note:

If Issue B is merged first, this issue may auto-close (the audit
becomes "fix the new tsc errors").

#2494 (Issue B) merged first. No tsc errors surfaced. The remaining
deliverable is AC #4 — extending the smoke test for defense-in-depth
against fixture-based regressions (the same motivation as #2495).

Findings per interface

Optional fields excluded from assertions per issue guidance
(cosmetic-severity deferred): password, agentsList, agentsSelectedId,
agentsPanel, pendingGatewayUrl, pendingGatewayToken on SettingsHost;
compactionStatus, compactionClearTimer, fallbackStatus,
fallbackClearTimer on CompactionHost.

Changes

Only ui/src/ui/app.smoke.test.ts:

• Header comment extended to reference audit(ui): missing field initializers across PollingHost/ChatHost/SettingsHost/ScrollHost/CompactionHost on RemoteClawApp #2496's scope expansion.
• Five new *_HOST_FIELDS constants: POLLING_HOST_FIELDS,
  CHAT_HOST_FIELDS, SCROLL_HOST_FIELDS, SETTINGS_HOST_FIELDS,
  COMPACTION_HOST_REQUIRED_FIELDS.
• SETTINGS_HOST_FIELDS composed via spread over Polling/Scroll/Chat +
  own required members to mirror the interface's & composition.
• COMPACTION_HOST_REQUIRED_FIELDS aliases TOOL_STREAM_HOST_FIELDS (all
  CompactionHost additions are optional); the separate test case documents
  the explicit audit and guards against future required additions.
• Five new it(...) cases following the existing pattern.

Test count: 3 → 8 passing.

CI gates (local verification)

• pnpm check → ✅ (format, tsgo, lint, script lints all clean)
• pnpm test → ✅ 7014 pass / 3 skip across 800 files; UI suite 288 pass
  across 17 files
• pnpm canvas:a2ui:bundle → ✅ 457 kB chunk generated

Test plan

• pnpm tsgo green
• pnpm lint green
• pnpm format:check green
• pnpm check green (includes all of the above plus script lints)
• pnpm test green (full suite, node + ui)
• UI smoke test: 8 tests pass (was 3)
• Sanity-check chore(ci): bootstrap RemoteClaw CI #1: field removal surfaces via tsgo (structural)
• Sanity-check chore: replace upstream CLAUDE.md with RemoteClaw config #2: field removal surfaces via new smoke test (runtime)

Closes #2496.

🤖 Generated with Claude Code