CDP focus-steal guard: Runtime.evaluate in IsFocusStealingMethod + weMinimized + 500ms wait

Runtime.evaluate can activate Chrome tab and steal fg. Fix: add to IsFocusStealingMethod (unconditional). Track weMinimized to prevent spurious post-restore. Wait 50x10ms for IsIconic before sending CDP (eliminates RACE where minimize command sent but Chrome not yet minimized).

Steps