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- Replace TextEditor with NativeTextEditor (NSViewRepresentable) so plain Enter sends the message and Shift/Cmd+Enter inserts a newline. The old TextEditor passed bare Return directly to NSTextView before SwiftUI's onKeyPress could intercept it, accidentally making Cmd+Enter send instead. - Add More…/Less toggle in ModelInfoView for descriptions longer than 250 characters, with smooth expand/collapse animation. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>