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#msgs .bubble had a blanket user-select:none (added to suppress iOS's long-press magnifier), which also blocked mouse text-selection on desktop. Scope the none to touch devices only (@media (hover:none)); keep it in multi-select mode. Desktop can now highlight/copy message text. Verified: desktop=auto, touch=none, sel-mode=none. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>