feat(webui): refine output timeline and model controls (#4108)

* feat(webui): refine output timeline and composer queue

* feat(webui): add provider model picker

* fix(webui): polish model settings and heartbeat checks

* chore: keep heartbeat changes out of webui pr

* refactor(webui): isolate settings routes

* fix(providers): align minimax anthropic test

* fix(providers): keep minimax anthropic base sdk-compatible

* fix(providers): normalize anthropic base urls

webui/src/components/ChatList.tsx

@@ -540,7 +540,7 @@ function SessionActivityIndicator({
         title={label}
         className="grid h-4 w-4 shrink-0 place-items-center"
       >
-        <span className="h-1.5 w-1.5 rounded-full bg-blue-500 dark:bg-blue-400" />
+        <span className="h-2 w-2 rounded-full bg-blue-500 dark:bg-blue-400" />
       </span>
     );
   }