feat: add diagnostics and resolve js-yaml advisory

[aaf2tbz]

Summary

• Add consented, privacy-minimized PostHog developer diagnostics with persisted opt-out, masked recordings, and developer feedback submission.
• Preserve persisted explicit theme selection in auxiliary windows while retaining dark as the first-launch default.
• Route Reminiscence (Steam 1675140) through the M11 compatibility pipeline.
• Make Cmd+Q stop only an actively MetalSharp-tracked game via the existing PID-scoped Stop path; ordinary app quit behavior is unchanged when none is active.
• Enforce bilateral M12 VKD3D-Proton/DXVK versus DXMT graphics-DLL route isolation in game folders.
• Bump all release version surfaces to 0.59.1.
• Harden fresh-install and upgrade staging: synchronize Wine direct-load MoltenVK copies from the verified VKMT 1.4.2 lane and repair missing M12 lanes even on the legacy DXMT-fast-path.

Validation

• cargo test — 740 passed
• cargo clippy --all-targets -- -D warnings
• cargo build --release — metalsharp-backend v0.59.1
• cargo fmt --check
• npm run build
• npx tsc --noEmit
• npx prettier --check .
• python3 tools/ci/validate-rules-toml.py
• python3 tools/ci/check-doc-freshness.py (existing unrelated warning only: docs/OPENGL-2-4-PLAN.md has no Updated: header)
• git diff --check
• Published bundles release manifest/digest verification plus archive layout validation; verified VKMT MoltenVK carries 1.4.2 and matches the runtime direct-load dylib byte-for-byte.