Fix WorkBuddy sync, hover hit testing, and status feedback

[STFQ]

Summary

• register and install the status plugin through WorkBuddy's plugin manager
• support WorkBuddy directory-linked installs that intentionally have no cache-registry entry
• identify and migrate obsolete source: local marketplace settings to the current directory-source schema
• fix Windows lifecycle hook execution
• normalize cursor coordinates for high-DPI displays and expand the intended hover hit regions
• show in-progress, success, and error feedback for real-time status actions
• run Rust backend unit tests before packaging in the Windows workflow

Root cause

WorkBuddy's current CLI reports a directory-marketplace plugin as installed and loads its hooks directly from the marketplace source, but does not add that plugin to installed_plugins.json. Agent Buddy previously required that cache entry and therefore reported a false installation failure even though WorkBuddy had loaded all 14 hooks and was writing lifecycle events.

An older Agent Buddy build also left a source: local marketplace setting. The new validation detects that legacy shape and the enable action replaces it with WorkBuddy's current source: directory plus url schema.

Impact

The real-time status button now completes successfully for directory-linked WorkBuddy plugins, stale settings are repairable, and duplicate inline loading is removed after the one-time repair. Existing credit, hover, tray, and status feedback fixes remain included.

Validation

• npm run build
• WorkBuddy CLI plugin manifest validation
• actual WorkBuddy marketplace registration/plugin-list inspection
• actual WorkBuddy hook loading and lifecycle event spool inspection
• Rust unit coverage for cached installs, directory-linked installs, outdated versions, legacy settings, and current settings
• Windows Action runs cargo test before Tauri packaging

[STFQ]

Follow-up compatibility fix is available in commit 59fcb8a.

Validation completed successfully in Windows Action #31499011305, including the new Rust backend tests, Tauri build, NSIS/MSI packaging, and release publication.

Test build: windows-build-5.