fix(citation-panel): reset expanded state when chunkId changes

CitationPanelContent uses a single instance across different citations
(RightPanel.tsx:251 renders without a key), so when the user clicks a
new citation while the panel is open, the prior expanded state leaks
into the new citation. The reset effect had an empty dependency array,
so it only fired on mount.

Add chunkId to the effect deps so the expanded state resets each time
the citation changes.

surfsense_web/components/citation-panel/citation-panel.tsx

@@ -32,7 +32,7 @@ export const CitationPanelContent: FC<CitationPanelContentProps> = ({ chunkId, o
 
 	useEffect(() => {
 		setExpanded(false);
-	}, []);
+	}, [chunkId]);
 
 	const chunkWindow = expanded ? EXPANDED_CHUNK_WINDOW : DEFAULT_CHUNK_WINDOW;