fix(ui): use folds Text priority instead of raw opacity (native-cinny nit)

Replaced raw style={{ opacity: N }} de-emphasis on folds <Text> with the
`priority` prop across search, schedule, profile, and tray UI. Left the cases
that aren't Text-priority candidates (an Icon opacity, a Box-row opacity, and a
Text with an explicit color token).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/app/features/message-search/SearchInput.tsx

@@ -280,7 +280,8 @@ export function SearchInput({
                         <Text
                           size="T200"
                           truncate
-                          style={{ opacity: 0.6, fontFamily: 'monospace', fontSize: '0.75em' }}
+                          priority="300"
+                          style={{ fontFamily: 'monospace', fontSize: '0.75em' }}
                         >
                           {user.userId}
                         </Text>