feat: attach button with camera, gallery, and file picker

Matthias Nott

2026-03-23 07ad99d7c4f8c52930442a34d316e634435bd75a

 lib/widgets/command_bar.dart
..
..
@@ -45,7 +45,7 @@
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           ),
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           _CommandButton(
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             icon: Icons.attach_file,
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-            label: 'Photo',
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+            label: 'Attach',
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             onTap: onPhoto,
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           ),
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           _CommandButton(