remove blank scrollbars and use predefined components (#452)

* style(chat and brains dropdown): remove blank scrollbars and use predefined components

* style(chat): use custom scrollbar style by using scrollbar class

frontend/app/chat/[chatId]/page.tsx

@@ -9,7 +9,7 @@ import { ChatProvider } from "./context/ChatContext";
 export default function ChatPage() {
   return (
     <main className="flex flex-col w-full pt-10">
-      <section className="flex flex-col flex-1 items-center w-full h-full min-h-screen">
+      <section className="flex flex-col flex-1 items-center w-full h-full min-h-[70vh]">
         <PageHeading
           title="Chat with your brain"
           subtitle="Talk to a language model about your uploaded data"

frontend/app/chat/components/ChatMessages/index.tsx

@@ -12,7 +12,7 @@ export const ChatMessages = (): JSX.Element => {
 
   return (
     <Card
-      className="p-5 max-w-3xl w-full flex flex-col mb-8 overflow-y-auto"
+      className="p-5 max-w-3xl w-full flex flex-col mb-8 overflow-y-auto scrollbar"
       ref={chatListRef}
     >
       <div className="flex-1">

frontend/app/chat/components/ChatsList/index.tsx

@@ -26,7 +26,7 @@ export const ChatsList = (): JSX.Element => {
             setOpen(false);
           }
         }}
-        className="lg:sticky fixed top-0 left-0 bottom-0 overflow-visible z-30 border-r border-black/10 dark:border-white/25 bg-white dark:bg-black"
+        className="flex flex-col lg:sticky fixed top-16 left-0 bottom-0 lg:h-[90vh] overflow-visible z-30 border-r border-black/10 dark:border-white/25 bg-white dark:bg-black"
       >
         <motion.div
           animate={{
@@ -36,18 +36,11 @@ export const ChatsList = (): JSX.Element => {
               ? "10px 10px 16px rgba(0, 0, 0, 0)"
               : "10px 10px 16px rgba(0, 0, 0, 0.5)",
           }}
-          className={cn("overflow-hidden")}
+          className={cn("overflow-hidden flex flex-col flex-1")}
         >
-          <div
-            style={{
-              display: "flex",
-              flexDirection: "column",
-              flex: 1,
-              height: "90vh",
-            }}
-          >
+          <div className="flex flex-col flex-1">
             <NewChatButton />
-            <div style={{ flex: 1, overflow: "scroll", height: "100%" }}>
+            <div className="flex-1 overflow-auto scrollbar h-full">
               {allChats.map((chat) => (
                 <ChatsListItem
                   key={chat.chat_id}

frontend/app/chat/layout.tsx

@@ -19,7 +19,7 @@ const Layout = ({ children }: LayoutProps): JSX.Element => {
 
   return (
     <ChatsProvider>
-      <div className="relative h-full w-full flex items-start">
+      <div className="relative h-full w-full flex justify-stretch items-stretch">
         <ChatsList />
         {children}
       </div>

frontend/lib/components/NavBar/components/NavItems/components/BrainsDropDown.tsx

@@ -3,9 +3,12 @@ import { useEffect, useRef, useState } from "react";
 import { FaBrain } from "react-icons/fa";
 import { IoMdAdd } from "react-icons/io";
 
+import Button from "@/lib/components/ui/Button";
+import Field from "@/lib/components/ui/Field";
 import { useBrainContext } from "@/lib/context/BrainProvider/hooks/useBrainContext";
 import { useEventTracking } from "@/services/analytics/useEventTracking";
-
+import { AnimatePresence, motion } from "framer-motion";
+import { MdCheck } from "react-icons/md";
 
 export const BrainsDropDown = (): JSX.Element => {
   const [showDropdown, setShowDropdown] = useState(false);
@@ -17,7 +20,7 @@ export const BrainsDropDown = (): JSX.Element => {
 
   const toggleDropdown = () => {
     setShowDropdown((prevState) => !prevState);
-    void track("SHOW_BRAINS_DROPDOWN")
+    void track("SHOW_BRAINS_DROPDOWN");
   };
 
   const handleCreateBrain = () => {
@@ -27,7 +30,7 @@ export const BrainsDropDown = (): JSX.Element => {
 
     void createBrain(newBrainName);
     setNewBrainName(""); // Reset the new brain name input
-    void track("BRAIN_CREATED")
+    void track("BRAIN_CREATED");
   };
 
   const handleClickOutside = (event: MouseEvent) => {
@@ -40,9 +43,9 @@ export const BrainsDropDown = (): JSX.Element => {
   };
 
   const changeBrains = (value: string) => {
-        void track("CHANGE_BRAIN")
-        setNewBrainName(value)
-  }
+    void track("CHANGE_BRAIN");
+    setNewBrainName(value);
+  };
 
   useEffect(() => {
     document.addEventListener("mousedown", handleClickOutside);
@@ -63,42 +66,58 @@ export const BrainsDropDown = (): JSX.Element => {
         >
           <FaBrain className="w-6 h-6" />
         </button>
-        {showDropdown && (
-          <div className="absolute overflow-scroll right-0 mt-2 w-96 h-52 bg-white dark:bg-gray-800 border border-gray-300 dark:border-gray-700 rounded-lg shadow-lg">
-            {/* Option to create a new brain */}
-            <div className="px-4 py-2">
-              <div className="flex items-center">
-                <input
-                  type="text"
-                  placeholder="Add a new brain"
-                  value={newBrainName}
-                  onChange={(e) => changeBrains(e.target.value)}
-                  className="flex-1 px-3 py-2 border border-gray-300 rounded-lg focus:outline-none"
-                />
-                <button
-                  type="button"
-                  className="flex-shrink-0 ml-2 px-3 py-2 text-sm font-medium leading-5 text-white transition-colors duration-200 transform bg-blue-600 border border-transparent rounded-lg hover:bg-blue-500 focus:outline-none focus:bg-blue-500"
-                  onClick={handleCreateBrain}
-                >
-                  <IoMdAdd className="w-5 h-5" />
-                </button>
-              </div>
-            </div>
-            {/* List of brains */}
-            {allBrains.map((brain) => (
-              <button
-                key={brain.id}
-                type="button"
-                className={`block w-full text-left px-4 py-2 text-sm leading-5 ${
-                  currentBrain?.id === brain.id ? "bg-blue-100" : ""
-                } text-gray-900 dark:text-gray-300 hover:bg-gray-100 dark:hover:bg-gray-700 focus:bg-gray-100 dark:focus:bg-gray-700 focus:outline-none`}
-                onClick={() => setActiveBrain({ ...brain })}
+        <AnimatePresence>
+          {showDropdown && (
+            <motion.div
+              initial={{ opacity: 0, y: -32, height: "0" }}
+              animate={{
+                opacity: 1,
+                y: 0,
+                height: "13rem",
+              }}
+              exit={{ opacity: 0, y: -32, height: "0" }}
+              transition={{ duration: 0.2, ease: "easeInOut" }}
+              className="absolute right-0 mt-2 w-96 flex flex-col bg-white dark:bg-gray-800 border border-gray-300 dark:border-gray-700 rounded-lg shadow-lg"
+            >
+              {/* Option to create a new brain */}
+              <form
+                onSubmit={(e) => {
+                  e.preventDefault();
+                  handleCreateBrain();
+                }}
+                className="flex items-center gap-2 p-2"
               >
-                {brain.name}
-              </button>
-            ))}
-          </div>
-        )}
+                <Field
+                  name="brainname"
+                  placeholder="Add a new brain"
+                  autoFocus
+                  onChange={(e) => changeBrains(e.target.value)}
+                />
+                <Button type="submit" className="px-2 py-2">
+                  <IoMdAdd className="w-5 h-5" />
+                </Button>
+              </form>
+              <div className="overflow-auto scrollbar flex flex-col h-full">
+                {/* List of brains */}
+                {allBrains.map((brain) => (
+                  <button
+                    key={brain.id}
+                    type="button"
+                    className={`flex items-center gap-2 w-full text-left px-4 py-2 text-sm leading-5 text-gray-900 dark:text-gray-300 hover:bg-gray-100 dark:hover:bg-gray-700 focus:bg-gray-100 dark:focus:bg-gray-700 focus:outline-none`}
+                    onClick={() => setActiveBrain({ ...brain })}
+                  >
+                    <span className="flex-1">{brain.name}</span>
+                    <span>
+                      {currentBrain?.id === brain.id && (
+                        <MdCheck className="text-xl" width={32} height={32} />
+                      )}
+                    </span>
+                  </button>
+                ))}
+              </div>
+            </motion.div>
+          )}
+        </AnimatePresence>
       </div>
     </>
   );