[Warren2068]

Problem

When a Dock item disappears during enumeration (for example, after an app is removed or unpinned), System Events can return error -1728 for that item. The current scan treats this as a failure of the entire list and clears dockItems, leaving click-to-minimize enabled but unresponsive.

Change

• Skip Dock items that vanish during the AppleScript scan while retaining valid items.
• Retry a failed or empty full scan up to three times, one second apart.
• Update the cached list on the main queue and avoid iterating a zero-length result.

Validation

• Xcode 27.0 Release build on macOS 27.2: passed (CODE_SIGNING_ALLOWED=NO).
• Embedded AppleScript syntax check with osacompile: passed.
• git diff --check: passed.
• Installed an ad hoc signed build locally, regranted Accessibility access, and confirmed the event tap installs without errors.
• The user confirmed that clicking the Dock icon of the frontmost app minimizes its window. The disappearing-item race has not been reproduced after this change.