fix: work through LOTUS_BUGS.md audit items

- ExportRoomHistory: make addEvents() async, call decryptEventIfNeeded()
  before inspecting type/content so E2EE rooms export decrypted text
- UrlPreviewCard: remove Google S2 favicon (privacy leak); show
  generic Icons.Link instead — no third-party external calls
- Profile: add statusDirtyRef so server presence sync cannot clobber
  in-flight emoji insertions or keystrokes; cleared on save/clear
- useLocalMessageSearch: include m.sticker, m.poll.start, and
  org.matrix.msc3381.poll.start in encrypted room search; index poll
  question and answer bodies
- SeasonalEffect: z-index 9997 → 9999 so overlays render above
  animated chat backgrounds
- LOTUS_BUGS.md: mark all resolved, document remaining blocked items

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

src/app/components/seasonal/SeasonalEffect.tsx

@@ -775,7 +775,7 @@ function SeasonalOverlay({
         position: 'fixed',
         inset: 0,
         pointerEvents: 'none',
-        zIndex: 9997,
+        zIndex: 9999,
         overflow: 'hidden',
       }}
     >

src/app/components/url-preview/UrlPreviewCard.tsx

@@ -1652,7 +1652,6 @@ function GenericCard({
   const description = prev['og:description'] ?? '';
   const siteName = typeof prev['og:site_name'] === 'string' ? prev['og:site_name'] : undefined;
   const domain = getDomain(url);
-  const faviconSrc = `https://www.google.com/s2/favicons?domain=${encodeURIComponent(domain)}&sz=16`;
 
   return (
     <>
@@ -1687,13 +1686,11 @@ function GenericCard({
           priority="300"
         >
           {!thumbUrl && (
-            <img
-              className={previewCss.GenericFaviconImg}
-              src={faviconSrc}
-              alt=""
+            <Icon
+              src={Icons.Link}
+              size="50"
               aria-hidden="true"
-              loading="lazy"
-              style={{ marginRight: '4px', verticalAlign: 'text-bottom' }}
+              style={{ marginRight: '4px', verticalAlign: 'text-bottom', opacity: 0.5 }}
             />
           )}
           {siteName ? `${siteName} | ` : ''}