fix(highlights): restore FAB selection updates by listening to document selectionchange; keep clearing selection after creation

src/hooks/useHighlightInteractions.ts

@@ -113,6 +113,32 @@ export const useHighlightInteractions = ({
     }, 10)
   }, [onTextSelection, onClearSelection])
 
+  // Listen to document-level selection changes to catch keyboard/touch/ios cases
+  useEffect(() => {
+    const handler = () => {
+      // Defer to allow DOM selection to settle
+      setTimeout(() => {
+        const selection = window.getSelection()
+        if (!selection || selection.rangeCount === 0) {
+          onClearSelection?.()
+          return
+        }
+
+        const range = selection.getRangeAt(0)
+        const text = selection.toString().trim()
+
+        if (text.length > 0 && contentRef.current?.contains(range.commonAncestorContainer)) {
+          onTextSelection?.(text)
+        } else {
+          onClearSelection?.()
+        }
+      }, 10)
+    }
+
+    document.addEventListener('selectionchange', handler)
+    return () => document.removeEventListener('selectionchange', handler)
+  }, [onTextSelection, onClearSelection])
+
   return { contentRef, handleSelectionEnd }
 }