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/MessageSearch.tsx

@@ -133,7 +133,7 @@ function EncryptedRoomCachePanel({ roomIds, onLoaded }: EncryptedRoomCachePanelP
               <Text size="T300" truncate>
                 {room.name}
               </Text>
-              <Text size="T200" style={{ opacity: 0.55 }}>
+              <Text size="T200" priority="300">
                 {msgEvents.length > 0
                   ? `${msgEvents.length} messages cached · oldest: ${new Date(oldest!.getTs()).toLocaleDateString()}`
                   : 'No messages cached yet'}
@@ -153,7 +153,7 @@ function EncryptedRoomCachePanel({ roomIds, onLoaded }: EncryptedRoomCachePanelP
               </Button>
             )}
             {!canLoadMore && events.length > 0 && (
-              <Text size="T200" style={{ opacity: 0.5, flexShrink: 0 }}>
+              <Text size="T200" priority="300" style={{ flexShrink: 0 }}>
                 Fully cached
               </Text>
             )}
@@ -656,7 +656,7 @@ export function MessageSearch({
                 <Icon size="200" src={senderOnlyMode ? Icons.User : Icons.Lock} />
                 <Text size="H5">{senderOnlyMode ? 'Messages from user' : 'Encrypted Rooms'}</Text>
                 {!senderOnlyMode && (
-                  <Text size="T200" style={{ opacity: 0.55 }}>
+                  <Text size="T200" priority="300">
                     {`${localResult.searchedRoomsCount} / ${localResult.encryptedRoomsCount} cached`}
                   </Text>
                 )}