feat(rate): persist per-viewport camera preferences

[d-sorgcodexagent]

Summary

• add strict cross-runtime camera-preferences/v1 state keyed by stable Impact, Swing, and Flight viewport IDs
• persist preset, Face On side, bounded zoom, Track Clubhead, and Auto Fit through view-workspace v2, QSettings, localStorage, and File Save/Open
• migrate view-workspace v1 deterministically to the exact moving/static defaults from fix(rate-ui): keep moving subjects framed by default #4303 and reject malformed or future documents before mutation
• keep moving targets, manual yaw/pitch, manual-orbit suspension, and per-frame tracking updates transient
• apply one app-owned preference authority across five PyQt6/React camera adapters with per-viewport isolation

Exact composition

• PR base: feat/4144-workspace-variation-study / feat(rate): persist variation study workspaces #4343 exact 4ff103d9a6ef886099c180da560e8458d5e20b49
• normal composition: fix(rate-of-closure): declutter orthographic camera axes #4331 exact e07e2a66a894c93b50c1ded308fc8902f2ff6c24, then fix(rate-ui): keep moving subjects framed by default #4303 exact 98cf35994488dd6f3d66916415bbc9f8e7c8bf3f
• independently reviewed implementation: 0d0dd7f1f199a242e0308ff8f8fc0092192e731b
• final documentation repair/head: f2d3be771a9ba1d17f5e8942484b3fb49c236527

No existing PR was retargeted, rebased, force-pushed, or rewritten.

Verification

• focused Python contract/workspace/compositor suites: 40 passed in final review; 58 passed during implementation
• focused React camera/workspace/File/stale-read suites: 48 passed in independent review; 44 passed during implementation
• TypeScript, zero-warning ESLint, and 211-module production build
• Ruff check/format and focused MyPy across six production modules
• campaign manifest, manifest layout, docs governance, module-size, minimum-test, and diff gates
• independent repaired-head verdict: PUBLISH

Scope and release boundary

This slice persists user camera preferences, not animation runtime state. It adds no new visible control or layout. Fresh rendered Playwright/native qualification, protected current-head CI, required review, dependency landing, immutable UpstreamDrift consumer parity, and final #4218/#4284 acceptance remain open. The draft does not close either issue.

Closes no issue.

[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Superseded by #4466, which consolidates all 43 open src/rate_of_closure PRs into one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.