test(rate): persist Ground Tee visual evidence

[d-sorgcodexagent]

Summary

• add a path-filtered local-fleet Playwright workflow for the Rate of Closure React surface
• prove Driver tee defaults and explicit Ground behavior with semantic assertions and deterministic screenshots
• upload screenshots, SHA-256 evidence manifest, traces, and HTML report for 14 days
• update the canonical specification and handoffs in the same commit

Verification

• 526 Vitest tests passed
• Playwright Ground/Tee scenario passed
• TypeScript, zero-warning ESLint, and Vite production build passed
• workflow policy, action pinning, YAML, documentation governance, and whitespace checks passed

Scope

This is a test-and-evidence-only child of #4325; it does not change physics or production behavior. It closes the durable visual-artifact gap identified in #4143, but #4143 remains open until the dependency stack lands through protected CI and review.

[dieterolson]

Superseded by #4466, which consolidates all 43 open src/rate_of_closure PRs into one
branch. Closing this one is measured, not assumed: verify_coverage.sh reports
safe=43 NOT-covered=0 against consolidated/rate-closure-remainder-2026-08-13, so this
PR's head is contained and nothing here is dropped.

Stacks were folded top-down (each child into its own parent, then the parent upward), so
non-tip work is included rather than skipped — including 8067ca79a (#4171, CAD export
artifact validation) and f9afa9d96 (#4309, strict ground result playback), each of which
lived in exactly one PR and is absent from its stack tip.

The consolidation also repairs defects the merge exposed, listed in #4466: two unguarded
datetime.UTC imports that break the Python 3.10 lane, a PyQt module registry that could no
longer construct the main window, the club-assembly binding and STL/sidecar controls that had
been dropped from the wired tree, and a filelock dependency that would have failed
tests (3.11) at collection.

Reopen this PR if you need its branch; the branch itself is untouched.