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

tests/agent/test_loop_save_turn.py

@@ -17,6 +17,7 @@ from nanobot.session.webui_turns import (
     WEBUI_SESSION_METADATA_KEY,
     WEBUI_TITLE_METADATA_KEY,
     WebuiTurnCoordinator,
+    clean_generated_title,
     maybe_generate_webui_title,
 )
 from nanobot.utils.llm_runtime import LLMRuntime
@@ -53,6 +54,11 @@ def test_agent_loop_llm_runtime_reflects_current_provider_and_model(tmp_path: Pa
     assert runtime.model == "next-model"
 
 
+def test_clean_generated_title_strips_reasoning_tags() -> None:
+    assert clean_generated_title("<think>reasoning</think> WebUI polish") == "WebUI polish"
+    assert clean_generated_title("Title: <think> The user said hello") == ""
+
+
 @pytest.mark.asyncio
 async def test_generate_webui_title_only_for_marked_webui_sessions(tmp_path: Path) -> None:
     loop = _make_full_loop(tmp_path)