refactor(mcp): project viewport family output schema from its owning module

[thymikee]

Summary

Moves the viewport command family's MCP output schema out of the shared command-output-schemas.ts grab-bag and into src/commands/management/viewport.ts, its owning module, matching the pattern already applied to interaction, device-management, push-management, and recording families earlier in this stack.

Part of #2819. Touches 4 files. Stacked on refactor/mcp-output-schemas-2819-recording-index-schemas (the next PR in the #2819 sequence).

Validation

Tested commit: 8faeba26d038808be6295c76cd0d1c6fba801321.

pnpm check:affected --run: 161 test files / 1352 tests passed, no failures, no retries needed.

No device needed — pure MCP schema move. Proved the published outputSchema is byte-identical before/after: dumped JSON.stringify(COMMAND_OUTPUT_SCHEMAS.viewport) via a throwaway vitest test on origin/main (fresh pnpm install --frozen-lockfile in a scratch worktree, removed afterward) and on this branch's HEAD. Both produced:

{"type":"object","properties":{"width":{"type":"number"},"height":{"type":"number"},"message":{"type":"string"}},"required":["width","height","message"]}

No unresolved risk: this is a structural move with an unchanged public schema, confirmed by the diff above (import/re-export churn only).

[github-actions]

Size Report

Metric	Base	Current	Diff
Installed (including dependencies)	4.88 MB	4.88 MB	+22 B
Package (unpacked)	4.88 MB	4.88 MB	+22 B
Package (download)	1.46 MB	1.46 MB	+22 B

Startup median (7 runs, lower is better):

Scenario	Base	Current	Diff
CLI --version	21.8 ms	21.3 ms	-0.5 ms
CLI --help	62.3 ms	61.7 ms	-0.6 ms

[cubic-dev-ai]

No issues found across 4 files

_{Re-trigger cubic}

[thymikee]

Reviewed at 8faeba2. This looks good: the viewport output schema now lives in src/commands/management/viewport.ts, it matches the removed hand-authored schema, and the MCP schema tests follow it.

The failing Smoke Tests job is a live iOS simulator wait timeout ("wait for Agent Device Tester"). This diff does not touch that path, so it looks unrelated. The Coverage failure is the eager-closure budget check that fails the same way on the other PRs in this stack, through src/commands/system/index.ts and src/commands/recording/index.ts, which this diff does not change.

[thymikee]

Rebased onto the updated base (recording/index schemas); new head f32c4ca. Resolved one import conflict in the MCP output schema registry, keeping the viewport family together with the interaction and recording modules. No review findings were open. Coverage failures seen earlier came from the lower links' eager-closure change, which the base now fixes; local checks (pnpm check:affected) pass.

[thymikee]

I found no problems in the change at f32c4ca. The earlier note on 8faeba2 still holds, and the viewport output schema now comes from its owning module with the same content. I confirmed that by reading the two hunks, not by dumping COMMAND_OUTPUT_SCHEMAS.viewport on both refs.

I did not run the eager-closure budget check locally. I relied on the diff's import edges and the passing test in the Coverage log.

Two CI jobs failed, and neither touches this patch. Coverage failed one test, "delayed restart health probe stops at the RPC deadline without retrying" in src/daemon-client/tests/daemon-client-transport.test.ts. It looks like a timing-sensitive loopback test under load, and the daemon-client code comes from the rebased base. Smoke Tests failed at "wait text Automation lab" because the lab app was not running on the iOS simulator. That is the Apple runner and daemon wait route, and this patch only changes MCP output-schema advertisement. I did not re-run either job, so this rests on the routes not overlapping, not on a green rerun.

Please rerun Smoke Tests and Coverage before merge. I did not re-review the rebased base, only the delta.