style(x): chat empty state, message bubbles, sidebar hover gap

- Chat empty state: icon-free heading, single suggestion list with
  leading icons and hover arrows, aligned to the composer column
- User message bubbles: rounded-2xl with flattened top-right corner,
  hover-only copy button under the bubble's bottom-right
- Sidebar: hairline gap between menu items so adjacent active/hover
  highlights don't merge

apps/x/apps/renderer/src/App.tsx

@@ -51,6 +51,7 @@ import {
 import {
   Message,
   MessageContent,
+  MessageCopyButton,
   MessageResponse,
 } from '@/components/ai-elements/message';
 import {
@@ -5888,14 +5889,17 @@ function App() {
                 <ChatMessageAttachments attachments={item.attachments} />
               </MessageContent>
               {item.content && (
-                <MessageContent>
-                  <MessageResponse
-                    components={streamdownComponents}
-                    remarkPlugins={userMessageRemarkPlugins}
-                  >
-                    {item.content}
-                  </MessageResponse>
-                </MessageContent>
+                <div className="flex flex-col items-end">
+                  <MessageContent>
+                    <MessageResponse
+                      components={streamdownComponents}
+                      remarkPlugins={userMessageRemarkPlugins}
+                    >
+                      {item.content}
+                    </MessageResponse>
+                  </MessageContent>
+                  <MessageCopyButton text={item.content} className="mt-0.5" />
+                </div>
               )}
             </Message>
           )
@@ -5903,26 +5907,29 @@ function App() {
         const { message, files } = parseAttachedFiles(item.content)
         return (
           <Message key={item.id} from={item.role} data-message-id={item.id}>
-            <MessageContent>
-              {files.length > 0 && (
-                <div className="flex flex-wrap gap-1.5 mb-2">
-                  {files.map((filePath, index) => (
-                    <span
-                      key={index}
-                      className="inline-flex items-center gap-1 text-xs bg-primary/10 text-primary px-2 py-0.5 rounded-full"
-                    >
-                      @{wikiLabel(filePath)}
-                    </span>
-                  ))}
-                </div>
-              )}
-              <MessageResponse
-                components={streamdownComponents}
-                remarkPlugins={userMessageRemarkPlugins}
-              >
-                {message}
-              </MessageResponse>
-            </MessageContent>
+            <div className="flex flex-col items-end">
+              <MessageContent>
+                {files.length > 0 && (
+                  <div className="flex flex-wrap gap-1.5 mb-2">
+                    {files.map((filePath, index) => (
+                      <span
+                        key={index}
+                        className="inline-flex items-center gap-1 text-xs bg-primary/10 text-primary px-2 py-0.5 rounded-full"
+                      >
+                        @{wikiLabel(filePath)}
+                      </span>
+                    ))}
+                  </div>
+                )}
+                <MessageResponse
+                  components={streamdownComponents}
+                  remarkPlugins={userMessageRemarkPlugins}
+                >
+                  {message}
+                </MessageResponse>
+              </MessageContent>
+              <MessageCopyButton text={message} className="mt-0.5" />
+            </div>
           </Message>
         )
       }

apps/x/apps/renderer/src/components/ai-elements/message.tsx

@@ -14,8 +14,10 @@ import {
 import { cn } from "@/lib/utils";
 import type { FileUIPart, UIMessage } from "ai";
 import {
+  CheckIcon,
   ChevronLeftIcon,
   ChevronRightIcon,
+  CopyIcon,
   PaperclipIcon,
   XIcon,
 } from "lucide-react";
@@ -38,6 +40,37 @@ export const Message = ({ className, from, ...props }: MessageProps) => (
   />
 );
 
+/**
+ * Minimal copy-to-clipboard affordance for a message bubble. Invisible until
+ * the surrounding Message (`.group`) is hovered.
+ */
+export const MessageCopyButton = ({
+  text,
+  className,
+}: {
+  text: string;
+  className?: string;
+}) => {
+  const [copied, setCopied] = useState(false);
+  return (
+    <button
+      type="button"
+      aria-label="Copy message"
+      onClick={() => {
+        void navigator.clipboard.writeText(text);
+        setCopied(true);
+        window.setTimeout(() => setCopied(false), 1200);
+      }}
+      className={cn(
+        "shrink-0 rounded-md p-1.5 text-muted-foreground/60 opacity-0 transition-opacity hover:bg-accent hover:text-foreground group-hover:opacity-100",
+        className
+      )}
+    >
+      {copied ? <CheckIcon className="size-3.5" /> : <CopyIcon className="size-3.5" />}
+    </button>
+  );
+};
+
 export type MessageContentProps = HTMLAttributes<HTMLDivElement>;
 
 export const MessageContent = ({
@@ -49,7 +82,7 @@ export const MessageContent = ({
     data-slot="message-content"
     className={cn(
       "is-user:dark flex w-fit max-w-full min-w-0 flex-col gap-2 overflow-hidden text-sm",
-      "group-[.is-user]:ml-auto group-[.is-user]:rounded-lg group-[.is-user]:bg-secondary group-[.is-user]:px-4 group-[.is-user]:py-3 group-[.is-user]:text-foreground",
+      "group-[.is-user]:ml-auto group-[.is-user]:rounded-2xl group-[.is-user]:rounded-tr-md group-[.is-user]:bg-secondary group-[.is-user]:px-4 group-[.is-user]:py-2.5 group-[.is-user]:text-foreground",
       "group-[.is-assistant]:w-full group-[.is-assistant]:text-foreground",
       className
     )}

apps/x/apps/renderer/src/components/chat-empty-state.tsx

@@ -1,4 +1,4 @@
-import { Bot, Mail, Sparkles, Telescope } from 'lucide-react'
+import { ArrowRight, BookOpen, Mail, Zap } from 'lucide-react'
 
 import { cn } from '@/lib/utils'
 import { ToolConnectionsCard } from '@/components/tool-connections-card'
@@ -12,8 +12,8 @@ interface ChatEmptyStateProps {
 
 const SUGGESTED_ACTIONS: { icon: typeof Mail; title: string; sub: string; prompt: string }[] = [
   { icon: Mail, title: 'Draft a reply', sub: 'to an email', prompt: "Let's draft a reply to [name]'s email" },
-  { icon: Bot, title: 'Set up a background agent', sub: 'that automates tasks', prompt: 'Set up a background agent that automates [task]' },
-  { icon: Telescope, title: 'Research a topic', sub: 'create a local wiki for me', prompt: 'Research [topic] and create a local wiki for me' },
+  { icon: Zap, title: 'Set up a background agent', sub: 'that automates tasks', prompt: 'Set up a background agent that automates [task]' },
+  { icon: BookOpen, title: 'Research a topic', sub: 'create a local wiki for me', prompt: 'Research [topic] and create a local wiki for me' },
 ]
 
 /**
@@ -25,37 +25,29 @@ export function ChatEmptyState({
   wide = false,
 }: ChatEmptyStateProps) {
   return (
-    <div className={cn('mx-auto flex w-full flex-col gap-6 px-2 py-6', wide ? 'max-w-2xl' : 'max-w-md')}>
-      <div className="flex items-center gap-3">
-        <div className="flex size-9 shrink-0 items-center justify-center rounded-[10px] border border-border bg-background text-foreground">
-          <Sparkles className="size-[17px]" />
-        </div>
-        <div>
-          <div className="text-base font-semibold tracking-tight">What are we working on?</div>
-          <div className="text-xs text-muted-foreground">Ask anything, or start with a suggestion.</div>
-        </div>
+    <div className={cn('mx-auto flex w-full flex-col gap-5 py-6', wide ? 'max-w-4xl px-4' : 'max-w-md px-2')}>
+      <div>
+        <div className="text-2xl font-semibold tracking-tight">What are we working on?</div>
+        <div className="mt-1 text-[15px] text-muted-foreground">Ask anything, or start with a suggestion.</div>
       </div>
 
-      <div>
-        <div className="px-1 pb-2 text-[10.5px] font-semibold uppercase tracking-wider text-muted-foreground">
-          Get started
-        </div>
-        <div className="flex flex-col gap-2">
-          {SUGGESTED_ACTIONS.map((action) => (
-            <button
-              key={action.title}
-              type="button"
-              onClick={() => onPickPrompt(action.prompt)}
-              className="flex items-start gap-2.5 rounded-lg border border-border bg-background px-3 py-2.5 text-left transition-colors hover:bg-accent"
-            >
-              <action.icon className="mt-0.5 size-3.5 shrink-0 text-muted-foreground" />
-              <div className="min-w-0 flex-1">
-                <div className="text-[12.8px] font-medium">{action.title}</div>
-                <div className="mt-0.5 text-[11.5px] text-muted-foreground">{action.sub}</div>
-              </div>
-            </button>
-          ))}
-        </div>
+      <div className="overflow-hidden rounded-xl border border-border">
+        {SUGGESTED_ACTIONS.map((action, i) => (
+          <button
+            key={action.title}
+            type="button"
+            onClick={() => onPickPrompt(action.prompt)}
+            className={cn(
+              'group flex w-full items-center gap-1.5 px-3.5 py-3 text-left transition-colors hover:bg-accent/50',
+              i > 0 && 'border-t border-border/60',
+            )}
+          >
+            <action.icon className="mr-2 size-4 shrink-0 text-foreground/80" strokeWidth={1.75} />
+            <span className="shrink-0 text-sm font-medium text-foreground">{action.title}</span>
+            <span className="truncate text-[13px] text-muted-foreground">{action.sub}</span>
+            <ArrowRight className="ml-auto size-3.5 shrink-0 text-muted-foreground/50 transition-colors group-hover:text-foreground" />
+          </button>
+        ))}
       </div>
 
       <ToolConnectionsCard />

apps/x/apps/renderer/src/components/ui/sidebar.tsx

@@ -462,7 +462,7 @@ function SidebarMenu({ className, ...props }: React.ComponentProps<"ul">) {
     <ul
       data-slot="sidebar-menu"
       data-sidebar="menu"
-      className={cn("flex w-full min-w-0 flex-col gap-0", className)}
+      className={cn("flex w-full min-w-0 flex-col gap-0.5", className)}
       {...props}
     />
   )