Add a setting to keep Tools expanded

[Blazetes]

What & why

Tools currently collapses whenever the panel closes. Add a default-off Keep Tools Expanded switch in Settings, persisted through SettingsService.

When enabled, Tools stays expanded across panel close/reopen and relaunch, and its header cannot collapse it. Turning the preference off restores normal manual expansion. Other submenus still reset when the panel closes.

How tested

• Exact source 163007a119b024287010824c5a2e16e02814b1ce was independently tested locally with Xcode 27.0 (27A266a) / SDK 27.0. No additional product-code change was needed.
• Local make check passed strict SwiftLint, unit tests, x86_64 typecheck and all 273 extracted localization keys; Chinese translations are complete.
• Full local ./scripts/release.sh v0.0.0-ci passed. App and CLI include arm64/x86_64 slices; deep signature and DMG integrity checks passed.
• Native fixtures compile the production SettingsService and PanelSectionState against inert hardware services. They passed preference write/reload in separate processes, Tools-preserving section resets, other-submenu resets and restored normal collapse when disabled.
• Three-language native rendering passed. Installed-app interaction: not run.

Checklist

• Builds locally (./scripts/release.sh v0.0.0-ci, exact source above)
• Added/updated Crisp/Resources/Localizable.xcstrings
• Screenshot or short clip for UI change

Native SwiftUI fixtures, not installed-app screenshots:

English	Simplified Chinese

[didriksg]

I'd rather not add this as a setting. The panel resets each time it closes, the way a menu does. A switch that only keeps one section open is the kind of setting I keep out of Crisp. When it's on, the Tools header also stops responding to clicks, and that looks like a bug.

I'd like to understand what you use it for, though. What do you usually open Tools for, and how often? That would help me see what's missing.