Add four behavioral surfaces to the runtime:
- patchConsole (default: true): intercepts console.* methods to route
output through writeToStdout/writeToStderr, preventing frame corruption.
Disabled in debug mode. Restored before Vue cleanup on teardown.
- waitUntilRenderFlush(): flushes pending throttled renders and waits
for the stdout write barrier, exposed on TuiApp and testing RenderResult.
- onRender callback: fires after each commit with { renderTime } in ms.
- maxFps option: overrides the scheduler's default 32ms throttle interval
with 1000/maxFps. The scheduler now accepts a throttleMs option and
exposes hasPending() for flush coordination.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Yunfei He
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