chore: prettier format all files, brotli, Sentry release tagging, CI gates

Prettier: auto-formatted 103 files to fix baseline. Prettier check in CI
  is now a hard gate (removed continue-on-error).

Brotli: installed libnginx-mod-http-brotli-filter/static. Enabled in nginx
  with brotli_static on for pre-compressed assets and comp_level 6.

Sentry releases: deploy script now exports VITE_APP_VERSION=<git-short-sha>
  before building so each Sentry release maps to an exact commit.
  CI also passes github.sha as VITE_APP_VERSION.

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

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

@@ -79,7 +79,9 @@ export function ReadReceiptAvatars({
           style={{
             display: 'flex',
             alignItems: 'center',
-            backgroundColor: lotusTerminal ? 'rgba(0,212,255,0.07)' : color.SurfaceVariant.Container,
+            backgroundColor: lotusTerminal
+              ? 'rgba(0,212,255,0.07)'
+              : color.SurfaceVariant.Container,
             border: lotusTerminal ? '1px solid rgba(0,212,255,0.30)' : '1px solid transparent',
             boxShadow: lotusTerminal ? '0 0 10px rgba(0,212,255,0.12)' : 'none',
             borderRadius: '999px',
@@ -88,8 +90,7 @@ export function ReadReceiptAvatars({
           }}
         >
           {displayed.map((userId) => {
-            const name =
-              getMemberDisplayName(room, userId) ?? getMxIdLocalPart(userId) ?? userId;
+            const name = getMemberDisplayName(room, userId) ?? getMxIdLocalPart(userId) ?? userId;
             const avatarMxc = room.getMember(userId)?.getMxcAvatarUrl();
             const avatarUrl = avatarMxc
               ? mxcUrlToHttp(mx, avatarMxc, useAuthentication, 32, 32, 'crop') ?? undefined