feat: Add OpenRouter component for multi-provider model access (#5271)

* feat: add OpenRouter component for multi-provider model access

- Add OpenRouter integration with provider-based model selection
- Support dynamic model fetching from OpenRouter API
- Implement temperature and max tokens controls
- Add site URL and app name for rankings
- Include model tooltips with context length and descriptions

* fix: restore SambaNova component in models __init__.py

* refactor: simplify OpenRouter build_model method

* [autofix.ci] apply automated fixes

* [autofix.ci] apply automated fixes (attempt 2/3)

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Co-authored-by: autofix-ci[bot] <114827586+autofix-ci[bot]@users.noreply.github.com>

src/frontend/src/icons/OpenRouter/index.tsx

@@ -0,0 +1,9 @@
+import React, { forwardRef } from "react";
+import SvgOpenRouter from "./OpenRouterIcon";
+
+export const OpenRouterIcon = forwardRef<
+  SVGSVGElement,
+  React.PropsWithChildren<{}>
+>((props, ref) => {
+  return <SvgOpenRouter ref={ref} {...props} />;
+});

src/frontend/src/utils/styleUtils.ts

@@ -282,6 +282,7 @@ import { NotionIcon } from "../icons/Notion";
 import { NvidiaIcon } from "../icons/Nvidia";
 import { OllamaIcon } from "../icons/Ollama";
 import { OpenAiIcon } from "../icons/OpenAi";
+import { OpenRouterIcon } from "../icons/OpenRouter";
 import { OpenSearch } from "../icons/OpenSearch";
 import { PineconeIcon } from "../icons/Pinecone";
 import { PostgresIcon } from "../icons/Postgres";
@@ -666,6 +667,7 @@ export const nodeIconsLucide: iconsType = {
   ChatOpenAI: OpenAiIcon,
   AzureChatOpenAI: OpenAiIcon,
   OpenAI: OpenAiIcon,
+  OpenRouter: OpenRouterIcon,
   OpenAIEmbeddings: OpenAiIcon,
   Pinecone: PineconeIcon,
   Qdrant: QDrantIcon,