Add Stationery and Stationery Dark themes with notebook chrome.

Manila folders, ruled chat, post-it nav, and folder tabs; dark variant uses Catppuccin Mocha colors with muted stickies and soft glows.

src/app/components/message/Reply.tsx

@@ -14,29 +14,54 @@ import { useRoomEvent } from '../../hooks/useRoomEvent';
 import colorMXID from '../../../util/colorMXID';
 import { GetMemberPowerTag } from '../../hooks/useMemberPowerTag';
 import { useOtherUserColor } from '../../hooks/useUserColor';
+import { isStationeryTheme, useTheme } from '../../hooks/useTheme';
+import { STATIONERY_NAME_INK } from '../../utils/paperSafeInk';
 
 type ReplyLayoutProps = {
   userColor?: string;
   username?: ReactNode;
 };
 export const ReplyLayout = as<'div', ReplyLayoutProps>(
-  ({ username, userColor, className, children, ...props }, ref) => (
-    <Box
-      className={classNames(css.Reply, className)}
-      alignItems="Center"
-      gap="100"
-      {...props}
-      ref={ref}
-    >
-      <Box style={{ color: userColor, maxWidth: toRem(200) }} alignItems="Center" shrink="No">
-        <Icon size="100" src={Icons.ReplyArrow} />
-        {username}
+  ({ username, userColor, className, children, ...props }, ref) => {
+  const theme = useTheme();
+  const isStationery = isStationeryTheme(theme);
+
+    return (
+      <Box
+        className={classNames(css.Reply, className)}
+        alignItems="Center"
+        gap="100"
+        {...props}
+        ref={ref}
+      >
+        <Box
+          style={
+            isStationery
+              ? {
+                  color: STATIONERY_NAME_INK,
+                  maxWidth: toRem(200),
+                  ...(userColor
+                    ? {
+                        ['--username-accent' as string]: userColor,
+                        textDecorationColor: userColor,
+                      }
+                    : null),
+                }
+              : { color: userColor, maxWidth: toRem(200) }
+          }
+          data-username-accent={isStationery && userColor ? '' : undefined}
+          alignItems="Center"
+          shrink="No"
+        >
+          <Icon size="100" src={Icons.ReplyArrow} />
+          {username}
+        </Box>
+        <Box grow="Yes" className={css.ReplyContent}>
+          {children}
+        </Box>
       </Box>
-      <Box grow="Yes" className={css.ReplyContent}>
-        {children}
-      </Box>
-    </Box>
-  )
+    );
+  }
 );
 
 export const ThreadIndicator = as<'div'>(({ ...props }, ref) => (