feat: RAG Integration (#238)

* feat: add rag provider and retriever

* feat: retriever tool

* feat: add retriever tool to the researcher node

* feat: add rag http apis

* feat: new message input supports resource mentions

* feat: new message input component support resource mentions

* refactor: need_web_search to need_search

* chore: RAG integration docs

* chore: change example api host

* fix: user message color in dark mode

* fix: mentions style

* feat: add local_search_tool to researcher prompt

* chore: research prompt

* fix: ragflow page size and reporter with

* docs: ragflow integration and add acknowledgment projects

* chore: format

web/src/app/chat/components/research-report-block.tsx

@@ -53,10 +53,7 @@ export function ResearchReportBlock({
   // }, [isCompleted]);
 
   return (
-    <div
-      ref={contentRef}
-      className={cn("relative flex flex-col pt-4 pb-8", className)}
-    >
+    <div ref={contentRef} className={cn("w-full pt-4 pb-8", className)}>
       {!isReplay && isCompleted && editing ? (
         <ReportEditor
           content={message?.content}