fix: color /me highlights with 'my highlights' color setting

- Set level: 'mine' on all highlights in /me page
- Highlights now use the customizable --highlight-color-mine CSS variable
- Quote icons and borders automatically match user's color preference
- Consistent styling with highlights shown elsewhere in the app

src/components/Me.tsx

@@ -105,7 +105,7 @@ const Me: React.FC<MeProps> = ({ relayPool }) => {
         {highlights.map((highlight) => (
           <HighlightItem
             key={highlight.id}
-            highlight={highlight}
+            highlight={{ ...highlight, level: 'mine' }}
             relayPool={relayPool}
             onHighlightDelete={handleHighlightDelete}
           />