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/tests/chat-list.test.tsx

@@ -204,7 +204,9 @@ describe("ChatList", () => {
       />,
     );
 
-    expect(screen.getAllByLabelText("Agent finished")).toHaveLength(1);
+    const finished = screen.getAllByLabelText("Agent finished");
+    expect(finished).toHaveLength(1);
+    expect(finished[0].firstElementChild).toHaveClass("h-2", "w-2");
   });
 
   it("folds long default workspace chats and can show all", () => {