Clean shelf state after removals#8
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Summary
lastSelectedIdwhen items are removed or all items are clearedWhy
Different shelf removal paths handled different parts of cleanup.
removeItem(_:)cancelled tasks, butremoveItems(byUrls:),removeItem(at:), max-item pruning, andclearAll()could leave selection state or background thumbnail/info tasks associated with removed items. This keeps the view model state internally consistent after every removal path.Verification
git diff --checkxcodebuild test -project DropKit/DropKit.xcodeproj -scheme DropKit -destination 'platform=macOS' -derivedDataPath /private/tmp/dropkit-shelf-cleanup-derived CODE_SIGNING_ALLOWED=NOpassed 13 tests, 0 failures