fix(ui): resolve 29 native UI/UX inconsistencies from folds design audit

Fixes N1–N94 findings from LOTUS_BUGS.md audit pass. Key changes:

- ProfileDecoration: raw <button> → folds <Button> for save/remove; remove
  undefined --accent-cyan var
- UserRoomProfile: textarea border uses color.SurfaceVariant.ContainerLine
  and config tokens instead of undefined --border-interactive var
- LotusToastContainer: z-index raised from 9997 → 10001 so toasts appear
  above Night Light overlay (9998) and modals (9999)
- Message.tsx: DeliveryStatus replaces Unicode glyphs with Icon components;
  MessageQuickReactions returns null instead of <span />; forward menu item
  gets correct size="100" on after icon
- AudioContent: speed chip variant/radii now matches Play chip (Secondary/300)
- ReadReceiptAvatars: pill border/radius/padding → folds config tokens;
  remove dead receipt-pill-btn className
- EventReaders: Header size 600→500; close button gets radii="300";
  borderBottom shorthand → borderBottomWidth token; remove raw fontSize
- General.tsx: selected background/seasonal picker border uses
  color.Primary.Main instead of color.Critical.Main (error red)
- RoomInsights: SectionHeader drops textTransform/letterSpacing/opacity;
  chart borderRadius → config tokens; remove raw fontSize:9;
  warning banner → SequenceCard
- RoomProfile.tsx: formatting toolbar raw <button> → folds <Button>;
  topic read-mode renders formatted_body via sanitizeCustomHtml
- MsgTypeRenderers: location Open button Chip→Button; opacity:0.65→priority
- UploadCardRenderer: caption raw <input> → folds <Input>
- VoiceMessageRecorder: replace undefined --bg-surface-variant/--tc-*
  vars with color.* tokens; replace bare <audio controls> with
  IconButton play/pause toggle
- App.tsx: mention highlight uses WCAG 2.1 relative luminance (gamma
  linearization) instead of simplified approximation; border now rgba
  semi-transparent instead of same color as background
- RoomNavItem: Mute MenuItem icon moved to before prop
- SearchFilters: HasLink chip variant="Success" outlined to match filter bar
- RoomViewHeader: Server Notice chip radii Pill→300; fix jotai import order
- Fix ESLint import/order errors in DeviceVerificationSetup, RoomTopicViewer,
  MediaGallery, and RoomViewHeader

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/app/components/read-receipt-avatars/ReadReceiptAvatars.tsx

@@ -1,6 +1,16 @@
 import React, { useState } from 'react';
 import { Room } from 'matrix-js-sdk';
-import { Icon, Icons, Modal, Overlay, OverlayBackdrop, OverlayCenter, Text, color } from 'folds';
+import {
+  Icon,
+  Icons,
+  Modal,
+  Overlay,
+  OverlayBackdrop,
+  OverlayCenter,
+  Text,
+  color,
+  config,
+} from 'folds';
 import FocusTrap from 'focus-trap-react';
 import { useMatrixClient } from '../../hooks/useMatrixClient';
 import { useSetting } from '../../state/hooks/settings';
@@ -64,7 +74,6 @@ export function ReadReceiptAvatars({
         onClick={() => setOpen(true)}
         title={tooltipNames}
         aria-label={tooltipNames}
-        className="receipt-pill-btn"
         style={{
           background: 'none',
           border: 'none',
@@ -95,10 +104,12 @@ export function ReadReceiptAvatars({
             backgroundColor: lotusTerminal
               ? 'rgba(0,212,255,0.07)'
               : color.SurfaceVariant.Container,
-            border: lotusTerminal ? '1px solid rgba(0,212,255,0.30)' : '1px solid transparent',
+            border: lotusTerminal
+              ? `${config.borderWidth.B300} solid rgba(0,212,255,0.30)`
+              : `${config.borderWidth.B300} solid transparent`,
             boxShadow: lotusTerminal ? '0 0 10px rgba(0,212,255,0.12)' : 'none',
-            borderRadius: '999px',
-            padding: '2px 6px',
+            borderRadius: config.radii.Pill,
+            padding: `${config.space.S100} ${config.space.S200}`,
             gap: '0px',
           }}
         >