fix: regenerate broken OpenAPI documents and check them in CI - #58262

deploy-www has failed on every dev commit since #58252, because packages/protocol/openapi.json (and the two copies in services/www) is not valid JSON.

[builtin:vite-json] plugin `builtin:vite-json` threw an error
Caused by:
    expected `,` or `]` at line 13419 column 5

At that line, a location query schema stops after "type": "null" } and "/api/debug/heap-dump" starts. The file was merged by hand, not generated, and lost the /api/experimental/client-mcp and /api/experimental/client-mcp/token paths along the way.

• Regenerate: run bun run generate in packages/protocol and then in services/www. The result is the generator's output for the current ClientApi, including the two client-mcp paths and the heap-dump route.
• Guard: add packages/protocol's check:generated to the Linux unit job. CI already checked that the services/www copies match packages/protocol/openapi.json, but not that the file matches ClientApi, so a broken file that was copied to all three places passed.

flowchart LR
  A["ClientApi (source)"] -->|"protocol check:generated (new)"| B["packages/protocol/openapi.json"]
  B -->|"www check:generated (existing)"| C["services/www/openapi.json, public/openapi.json"]

The new step fails against the current dev file and passes with this change.

Flaky update-restart tests

The two TUI tests added in #58139 (restarting after an update…, quitting after a background update…) failed on both unit (linux) runs of this PR. Changing test.yml invalidates turbo's cache, so every package's tests run here. They waited on frames with a renderer whose frame loop never started, so waitForFrame gave up as soon as no render was scheduled while the home route was still loading:

error: Timed out waiting for frame predicate after 20 passes
frameId: 2
isRunning: false
hasScheduledRender: false

They now start the frame loop and wait for terminalHandoff's complete, the same as the selection-copy test in the same file.