chore: update editor actions

web/src/components/MemoEditor/ActionButton/MarkdownMenu.tsx

 import { Dropdown, IconButton, Menu, MenuButton, MenuItem } from "@mui/joy";
+import toast from "react-hot-toast";
 import Icon from "@/components/Icon";
 import showPreviewMarkdownDialog from "@/components/PreviewMarkdownDialog";
 import { EditorRefActions } from "../Editor";
@@ -58,6 +59,12 @@ const MarkdownMenu = (props: Props) => {
   };
 
   const handlePreviewClick = () => {
+    const content = editorRef.current?.getContent() ?? "";
+    if (content === "") {
+      toast.error("Nothing to preview");
+      return;
+    }
+
     showPreviewMarkdownDialog(editorRef.current?.getContent() ?? "");
   };
 
@@ -83,7 +90,7 @@ const MarkdownMenu = (props: Props) => {
           <span>Checkbox</span>
         </MenuItem>
         <MenuItem onClick={handlePreviewClick}>
-          <Icon.NotebookText className="w-4 h-auto" />
+          <Icon.GanttSquare className="w-4 h-auto" />
           <span>Preview</span>
         </MenuItem>
       </Menu>

web/src/components/MemoEditor/ActionButton/TagSelector.tsx

@@ -53,9 +53,9 @@ const TagSelector = (props: Props) => {
               {tags.map((tag) => {
                 return (
                   <div
-                    className="inline-block w-auto max-w-full cursor-pointer rounded text-sm leading-6 px-2 hover:bg-zinc-100 dark:hover:bg-zinc-800 shrink-0"
-                    onClick={() => handleTagClick(tag)}
                     key={tag}
+                    className="inline-flex w-auto max-w-full cursor-pointer rounded text-sm leading-5 px-1 text-gray-500 dark:text-gray-400 hover:bg-zinc-100 dark:hover:bg-zinc-800"
+                    onClick={() => handleTagClick(tag)}
                   >
                     <OverflowTip>#{tag}</OverflowTip>
                   </div>