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/lib/provider-brand.ts

@@ -146,7 +146,9 @@ const PROVIDER_BRANDS: Record<string, ProviderBrand> = {
   searxng: brand("searxng.org", "#3050FF", "SX"),
   siliconflow: brand("siliconflow.cn", "#111827", "SF"),
   skywork: brand("skywork.ai", "#5B5BF6", "SW"),
-  stepfun: brand("stepfun.com", "#2F6BFF", "SF"),
+  stepfun: brand("stepfun.com", "#2F6BFF", "SF", [
+    "https://www.stepfun.com/step_favicon.svg",
+  ]),
   tavily: brand("tavily.com", "#111827", "T"),
   volcengine: brand("volcengine.com", "#1664FF", "VE"),
   vllm: brand("vllm.ai", "#2563EB", "VL"),