fix(menu): open blacklist submenus on hover

[kirillDevPro]

Coin context-menu blacklist branches now use MoonUI's hover-driven submenus. Hover opens and switches branches without rebuilding the entire context menu; nested menus flip or move to stay inside the viewport.

Removes the click/reopen expansion workaround and pins all 23 MoonUI packages to 18d8bf6d29832dd952ef14d5a26a143cd6460ef8 from Moonbot-Tech/MoonUI#63. Other dependencies are unchanged.

Validation:

• cargo fetch --locked.
• cargo test --workspace --locked --target x86_64-pc-windows-msvc.
• cargo clippy --workspace --all-targets --locked --target x86_64-pc-windows-msvc.
• cargo fmt --all and git diff --check.
• The Windows executable containing the changes was built, shipped, and SHA-256 verified before publication.
• Upstream hover/geometry regressions pass in Dark/Light themes and were mutation-proven; independent review found no correctness defects.
• Native MoonTerminal interaction was not run here. The upstream screenshot comparison remains red against older gallery baselines; those baselines were not changed.

CI completion was explicitly waived for this publication; local validation is reported separately above.