theme: exempt status-indicator animations from anim-speed override

Cursor blink, card-bar-pulse, sync spinner and the chat unread blink all
have deliberate cadences — letting body.anim-fast/anim-slow speed them up
turns them into unreadable strobes (or the sync icon spinning at 100ms).
Higher-specificity rules pin each one to its natural duration via
!important.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

public/plugins/chat/chat.css

@@ -332,3 +332,10 @@
 #chat-footer-btn.blinking {
     animation: chatBlink 1.2s ease-in-out infinite;
 }
+/* Ignore the global anim-speed override — the unread blink has a
+   deliberate cadence that becomes an unreadable strobe when sped up. */
+body.anim-fast #chat-footer-btn.blinking,
+body.anim-slow #chat-footer-btn.blinking {
+    animation: chatBlink 1.2s ease-in-out infinite !important;
+    animation-duration: 1.2s !important;
+}