fix: text compose papercuts (#270)

* make fixes

* cleanup

js/desktop/src/hooks/use-file-input.ts

@@ -48,16 +48,22 @@ export function useFileInput({
   useEffect(() => {
     if (!enabled) return;
 
+    // Capture phase so file pastes always become attachments — ProseMirror
+    // would otherwise inline pasted images as ephemeral blob: URLs. Mixed
+    // clipboards (e.g. Excel/Word ship an image rendition alongside the text)
+    // must still paste as text, so only file-only pastes are intercepted.
     const handlePaste = (e: ClipboardEvent) => {
-      const files = Array.from(e.clipboardData?.files ?? []);
-      if (files.length > 0) {
-        e.preventDefault();
-        onFilesRef.current(files);
-      }
+      const data = e.clipboardData;
+      if (!data) return;
+      const files = Array.from(data.files);
+      if (files.length === 0 || data.types.includes('text/plain')) return;
+      e.preventDefault();
+      e.stopPropagation();
+      onFilesRef.current(files);
     };
 
-    window.addEventListener('paste', handlePaste);
-    return () => window.removeEventListener('paste', handlePaste);
+    window.addEventListener('paste', handlePaste, true);
+    return () => window.removeEventListener('paste', handlePaste, true);
   }, [enabled]);
 
   // Drag and drop handlers