The right-hand properties panel was a fixed 320px flex column, permanently shrinking the canvas — on a screen with real content (tabs, gauges), this made the editor's preview visibly narrower than the actual /play rendering, to the point of wrapping tab labels differently. It's now position:fixed with a drag handle header, moved out of .builder3's flex flow so .builderCanvasArea automatically reclaims the space; closing it (✕, replaced by a small "⚙️ Propriétés" reopen button) frees the full width for a more faithful preview. Position and open/closed state persist per screen in localStorage and get reapplied after every selection change (which replaces #builder3 wholesale). Falls back to a normal stacked column below 1300px width, where a floating panel wouldn't fit usefully.
william
03ca2723c5