Steadier screen reading: floating layers no longer confuse window detection

Steadier screen recognition

• Fixed an issue where the cursor-effect layer and the island could be mistaken by the system for "the current window" while the AI operates your computer — this used to make the AI mis-identify its target window and fall back to scanning the whole screen. These floating layers no longer take focus.
• Fixed misleading errors that told you to grant the Screen Recording permission when window detection failed for other reasons. The prompt now only appears when the permission is actually missing; momentary connection hiccups retry automatically.

Easier troubleshooting

• Slow or failed window detection now leaves detailed diagnostics instead of silently degrading.