⚡ Bolt: Use XFlush instead of XSync in drw_map

[google-labs-jules]

💡 What: Replaced XSync(drw->dpy, False) with XFlush(drw->dpy) in drw_map.
🎯 Why: XSync blocks the client until the X server processes the request, creating a performance bottleneck in drawing paths. drw_map is used for copying pixmaps to windows, which does not require synchronous confirmation.
📊 Impact: Reduces latency in UI updates (bar redrawing, window title updates) by eliminating blocking round-trips.
🔬 Measurement: Verified that the application builds correctly with make clean && make. No logic changes beyond synchronization method.

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PR created automatically by Jules for task 16795836906062345116 started by @paperbenni

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