fix: pass raw base64 to Clipboard.setImageAsync (not data URI)

Matthias Nott

2026-03-07 3c02569a045aa5303f97142893f7cfef86eaf9b3

 components/chat/ImageViewer.tsx
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@@ -71,7 +71,7 @@
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   const handleCopy = useCallback(async () => {
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     try {
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-      await Clipboard.setImageAsync(`data:image/png;base64,${imageBase64}`);
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+      await Clipboard.setImageAsync(imageBase64);
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     } catch (err: any) {
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       Alert.alert("Copy Error", err?.message ?? String(err));
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     }