feat(conversations): discord-style composer + emoji picker

Redesign message composer to match Discord's compact input bar
with + button, inline editor, and action icons. Add emoji-mart
picker in popover that follows the active theme. Switch channel
page to CSS grid layout to fix composer overflow issues.

bun.lock

@@ -26,6 +26,8 @@
         "@dnd-kit/modifiers": "^9.0.0",
         "@dnd-kit/sortable": "^10.0.0",
         "@dnd-kit/utilities": "^3.2.2",
+        "@emoji-mart/data": "^1.2.1",
+        "@emoji-mart/react": "^1.1.1",
         "@hookform/resolvers": "^5.2.2",
         "@json-render/core": "^0.4.0",
         "@json-render/react": "^0.4.0",
@@ -372,6 +374,10 @@
 
     "@emnapi/wasi-threads": ["@emnapi/wasi-threads@1.1.0", "", { "dependencies": { "tslib": "^2.4.0" } }, "sha512-WI0DdZ8xFSbgMjR1sFsKABJ/C5OnRrjT06JXbZKexJGrDuPTzZdDYfFlsgcCXCyf+suG5QU2e/y1Wo2V/OapLQ=="],
 
+    "@emoji-mart/data": ["@emoji-mart/data@1.2.1", "", {}, "sha512-no2pQMWiBy6gpBEiqGeU77/bFejDqUTRY7KX+0+iur13op3bqUsXdnwoZs6Xb1zbv0gAj5VvS1PWoUUckSr5Dw=="],
+
+    "@emoji-mart/react": ["@emoji-mart/react@1.1.1", "", { "peerDependencies": { "emoji-mart": "^5.2", "react": "^16.8 || ^17 || ^18" } }, "sha512-NMlFNeWgv1//uPsvLxvGQoIerPuVdXwK/EUek8OOkJ6wVOWPUizRBJU0hDqWZCOROVpfBgCemaC3m6jDOXi03g=="],
+
     "@esbuild-kit/core-utils": ["@esbuild-kit/core-utils@3.3.2", "", { "dependencies": { "esbuild": "~0.18.20", "source-map-support": "^0.5.21" } }, "sha512-sPRAnw9CdSsRmEtnsl2WXWdyquogVpB3yZ3dgwJfe8zrOzTsV7cJvmwrKVa+0ma5BoiGJ+BoqkMvawbayKUsqQ=="],
 
     "@esbuild-kit/esm-loader": ["@esbuild-kit/esm-loader@2.6.5", "", { "dependencies": { "@esbuild-kit/core-utils": "^3.3.2", "get-tsconfig": "^4.7.0" } }, "sha512-FxEMIkJKnodyA1OaCUoEvbYRkoZlLZ4d/eXFu9Fh8CbBBgP5EmZxrfTRyN0qpXZ4vOvqnE5YdRdcrmUUXuU+dA=="],
@@ -1554,6 +1560,8 @@
 
     "embla-carousel-reactive-utils": ["embla-carousel-reactive-utils@8.6.0", "", { "peerDependencies": { "embla-carousel": "8.6.0" } }, "sha512-fMVUDUEx0/uIEDM0Mz3dHznDhfX+znCCDCeIophYb1QGVM7YThSWX+wz11zlYwWFOr74b4QLGg0hrGPJeG2s4A=="],
 
+    "emoji-mart": ["emoji-mart@5.6.0", "", {}, "sha512-eJp3QRe79pjwa+duv+n7+5YsNhRcMl812EcFVwrnRvYKoNPoQb5qxU8DG6Bgwji0akHdp6D4Ln6tYLG58MFSow=="],
+
     "emoji-regex": ["emoji-regex@9.2.2", "", {}, "sha512-L18DaJsXSUk2+42pv8mLs5jJT2hqFkFE4j21wOmgbUqsZ2hL72NsUU785g9RXgo3s0ZNgVl42TiHp3ZtOv/Vyg=="],
 
     "encodeurl": ["encodeurl@2.0.0", "", {}, "sha512-Q0n9HRi4m6JuGIV1eFlmvJB7ZEVxu93IrMyiMsGC0lrMJMWzRgx6WGquyfQgZVb31vhGgXnfmPNNXmxnOkRBrg=="],

package.json

@@ -53,6 +53,8 @@
 		"@dnd-kit/modifiers": "^9.0.0",
 		"@dnd-kit/sortable": "^10.0.0",
 		"@dnd-kit/utilities": "^3.2.2",
+		"@emoji-mart/data": "^1.2.1",
+		"@emoji-mart/react": "^1.1.1",
 		"@hookform/resolvers": "^5.2.2",
 		"@json-render/core": "^0.4.0",
 		"@json-render/react": "^0.4.0",

src/app/dashboard/conversations/[channelId]/page.tsx

@@ -26,7 +26,10 @@ export default async function ChannelPage({
 
   return (
     <>
-      <div className="flex min-h-0 flex-1 flex-col overflow-hidden">
+      <div
+        className="grid h-full overflow-hidden"
+        style={{ gridTemplateRows: "auto 1fr auto" }}
+      >
         <ChannelHeader
           name={channel.name}
           description={channel.description ?? undefined}

src/app/globals.css

@@ -231,6 +231,23 @@
   height: 0;
 }
 
+/* constrain composer editor height */
+.composer-editor .ProseMirror {
+  max-height: 200px;
+  overflow-y: auto;
+}
+@media (max-width: 639px) {
+  .composer-editor .ProseMirror {
+    max-height: 30vh;
+  }
+}
+
+/* emoji-mart theme overrides */
+em-emoji-picker {
+  --border-radius: 12px;
+  max-height: 350px;
+}
+
 /* mention pill styling in messages and editor */
 .mention {
   border-radius: calc(var(--radius) - 4px);

src/components/agent/main-content.tsx

@@ -20,7 +20,7 @@ export function MainContent({
     <div
       {...rest}
       className={cn(
-        "flex flex-col overflow-x-hidden min-w-0",
+        "flex flex-col overflow-x-hidden min-w-0 min-h-0",
         "transition-[flex,opacity] duration-300 ease-in-out",
         isCollapsed
           ? "flex-[0_0_0%] opacity-0 overflow-hidden pointer-events-none"
@@ -31,7 +31,7 @@ export function MainContent({
       )}
     >
       <div className={cn(
-        "@container/main flex flex-1 flex-col min-w-0",
+        "@container/main flex flex-1 flex-col min-w-0 min-h-0",
         isConversations && "overflow-hidden"
       )}>
         {children}

src/components/conversations/message-composer.tsx

@@ -6,15 +6,79 @@ import StarterKit from "@tiptap/starter-kit"
 import Placeholder from "@tiptap/extension-placeholder"
 import Link from "@tiptap/extension-link"
 import Mention from "@tiptap/extension-mention"
-import { Bold, Italic, Code, Link as LinkIcon, List, ListOrdered, Send, Paperclip, Smile } from "lucide-react"
+import {
+  Bold,
+  Italic,
+  Code,
+  List,
+  ListOrdered,
+  Plus,
+  Smile,
+  Sticker,
+  Gift,
+} from "lucide-react"
 import { Button } from "@/components/ui/button"
-import { Separator } from "@/components/ui/separator"
+import {
+  Popover,
+  PopoverContent,
+  PopoverTrigger,
+} from "@/components/ui/popover"
 import { sendMessage } from "@/app/actions/chat-messages"
 import { setTyping } from "@/app/actions/conversations-realtime"
 import { useRouter } from "next/navigation"
+import { useTheme } from "next-themes"
 import { cn } from "@/lib/utils"
 import { createMentionSuggestion } from "./mention-suggestion"
 
+// lazy-load emoji picker to keep initial bundle small
+const EmojiPicker = React.lazy(() =>
+  import("@emoji-mart/react").then((mod) => ({ default: mod.default })),
+)
+
+type EmojiData = {
+  readonly native: string
+}
+
+/** read a CSS custom property and resolve it to an "R, G, B" string */
+function cssVarToRgb(varName: string): string | null {
+  if (typeof window === "undefined") return null
+  const style = getComputedStyle(document.documentElement)
+  const raw = style.getPropertyValue(varName).trim()
+  if (!raw) return null
+
+  // create a temporary element to resolve the color
+  const el = document.createElement("div")
+  el.style.color = raw
+  document.body.appendChild(el)
+  const computed = getComputedStyle(el).color
+  document.body.removeChild(el)
+
+  // computed is like "rgb(R, G, B)" or "rgba(R, G, B, A)"
+  const match = computed.match(
+    /rgba?\(\s*([\d.]+),?\s*([\d.]+),?\s*([\d.]+)/,
+  )
+  if (!match) return null
+  return `${Math.round(Number(match[1]))}, ${Math.round(Number(match[2]))}, ${Math.round(Number(match[3]))}`
+}
+
+function useEmojiThemeVars(): Record<string, string> {
+  const [vars, setVars] = React.useState<Record<string, string>>({})
+  const { resolvedTheme } = useTheme()
+
+  React.useEffect(() => {
+    const bg = cssVarToRgb("--popover")
+    const fg = cssVarToRgb("--popover-foreground")
+    const input = cssVarToRgb("--muted")
+    const next: Record<string, string> = {}
+    if (bg) next["--em-rgb-background"] = bg
+    if (fg) next["--em-rgb-color"] = fg
+    if (input) next["--em-rgb-input"] = input
+    setVars(next)
+  }, [resolvedTheme])
+
+  return vars
+}
+
 type MessageComposerProps = {
   readonly channelId: string
   readonly channelName: string
@@ -29,7 +93,9 @@ type MentionInput = {
   targetId: string | null
 }
 
-function extractMentions(json: Record<string, unknown>): Array<MentionInput> {
+function extractMentions(
+  json: Record<string, unknown>,
+): Array<MentionInput> {
   const mentions: Array<MentionInput> = []
 
   function walk(node: Record<string, unknown>) {
@@ -42,7 +108,10 @@ function extractMentions(json: Record<string, unknown>): Array<MentionInput> {
       } else if (id === "here") {
         mentions.push({ mentionType: "here", targetId: null })
       } else if (id === "compass-agent") {
-        mentions.push({ mentionType: "agent", targetId: "compass-agent" })
+        mentions.push({
+          mentionType: "agent",
+          targetId: "compass-agent",
+        })
       } else {
         mentions.push({ mentionType: "user", targetId: id })
       }
@@ -68,10 +137,13 @@ export function MessageComposer({
   onSent,
 }: MessageComposerProps) {
   const router = useRouter()
+  const { resolvedTheme } = useTheme()
+  const emojiThemeVars = useEmojiThemeVars()
   const [isSending, setIsSending] = React.useState(false)
   const [error, setError] = React.useState<string | null>(null)
+  const [showToolbar, setShowToolbar] = React.useState(false)
+  const [emojiOpen, setEmojiOpen] = React.useState(false)
 
-  // typing indicator - debounce to avoid spamming server
   const lastTypingSentRef = React.useRef<number>(0)
   const TYPING_DEBOUNCE_MS = 3000
 
@@ -80,7 +152,10 @@ export function MessageComposer({
     if (now - lastTypingSentRef.current >= TYPING_DEBOUNCE_MS) {
       lastTypingSentRef.current = now
       setTyping(channelId).catch((err) => {
-        console.error("[MessageComposer] typing indicator error:", err)
+        console.error(
+          "[MessageComposer] typing indicator error:",
+          err,
+        )
       })
     }
   }, [channelId])
@@ -94,7 +169,7 @@ export function MessageComposer({
         blockquote: false,
       }),
       Placeholder.configure({
-        placeholder: placeholder ?? `Message #${channelName}...`,
+        placeholder: placeholder ?? `Message #${channelName}`,
       }),
       Link.configure({
         openOnClick: false,
@@ -112,7 +187,11 @@ export function MessageComposer({
     ],
     editorProps: {
       attributes: {
-        class: "prose prose-sm max-w-none focus:outline-none min-h-[80px] p-3",
+        class: cn(
+          "prose prose-sm max-w-none focus:outline-none",
+          "min-h-[22px] py-[11px] px-0",
+          "text-sm leading-[22px]",
+        ),
       },
     },
     onUpdate: () => {
@@ -121,6 +200,15 @@ export function MessageComposer({
     },
   })
 
+  const handleEmojiSelect = React.useCallback(
+    (emoji: EmojiData) => {
+      if (!editor) return
+      editor.chain().focus().insertContent(emoji.native).run()
+      setEmojiOpen(false)
+    },
+    [editor],
+  )
+
   const handleSend = React.useCallback(async () => {
     if (!editor || isSending) return
 
@@ -131,7 +219,9 @@ export function MessageComposer({
     setError(null)
 
     try {
-      const mentions = extractMentions(editor.getJSON() as Record<string, unknown>)
+      const mentions = extractMentions(
+        editor.getJSON() as Record<string, unknown>,
+      )
       const contentHtml = editor.getHTML()
 
       const result = await sendMessage({
@@ -150,7 +240,9 @@ export function MessageComposer({
         setError(result.error ?? "Failed to send message")
       }
     } catch (err) {
-      setError(err instanceof Error ? err.message : "Failed to send message")
+      setError(
+        err instanceof Error ? err.message : "Failed to send message",
+      )
     } finally {
       setIsSending(false)
     }
@@ -175,102 +267,205 @@ export function MessageComposer({
   }, [editor, handleSend])
 
   return (
-    <div className="shrink-0 border-t bg-background p-4">
+    <div className="min-h-[68px] px-2 pb-4 pt-2 sm:px-4">
-      <div className="rounded-lg border bg-background">
+      {/* formatting toolbar */}
-        <EditorContent editor={editor} className="max-h-[200px] overflow-y-auto" />
+      {editor && showToolbar && (
+        <div className="mb-1.5 flex items-center gap-0.5 pl-10 sm:pl-12">
+          <Button
+            variant="ghost"
+            size="icon"
+            className="h-7 w-7 rounded-md text-muted-foreground hover:text-foreground"
+            onClick={() =>
+              editor.chain().focus().toggleBold().run()
+            }
+            disabled={
+              !editor.can().chain().focus().toggleBold().run()
+            }
+          >
+            <Bold
+              className={cn(
+                "h-3.5 w-3.5",
+                editor.isActive("bold") && "text-primary",
+              )}
+            />
+          </Button>
+          <Button
+            variant="ghost"
+            size="icon"
+            className="h-7 w-7 rounded-md text-muted-foreground hover:text-foreground"
+            onClick={() =>
+              editor.chain().focus().toggleItalic().run()
+            }
+            disabled={
+              !editor.can().chain().focus().toggleItalic().run()
+            }
+          >
+            <Italic
+              className={cn(
+                "h-3.5 w-3.5",
+                editor.isActive("italic") && "text-primary",
+              )}
+            />
+          </Button>
+          <Button
+            variant="ghost"
+            size="icon"
+            className="h-7 w-7 rounded-md text-muted-foreground hover:text-foreground"
+            onClick={() =>
+              editor.chain().focus().toggleCode().run()
+            }
+            disabled={
+              !editor.can().chain().focus().toggleCode().run()
+            }
+          >
+            <Code
+              className={cn(
+                "h-3.5 w-3.5",
+                editor.isActive("code") && "text-primary",
+              )}
+            />
+          </Button>
+          <Button
+            variant="ghost"
+            size="icon"
+            className="h-7 w-7 rounded-md text-muted-foreground hover:text-foreground"
+            onClick={() =>
+              editor.chain().focus().toggleBulletList().run()
+            }
+          >
+            <List
+              className={cn(
+                "h-3.5 w-3.5",
+                editor.isActive("bulletList") && "text-primary",
+              )}
+            />
+          </Button>
+          <Button
+            variant="ghost"
+            size="icon"
+            className="h-7 w-7 rounded-md text-muted-foreground hover:text-foreground"
+            onClick={() =>
+              editor.chain().focus().toggleOrderedList().run()
+            }
+          >
+            <ListOrdered
+              className={cn(
+                "h-3.5 w-3.5",
+                editor.isActive("orderedList") && "text-primary",
+              )}
+            />
+          </Button>
+        </div>
+      )}
 
-        {editor && (
+      {/* main composer bar */}
-          <div className="flex items-center justify-between border-t p-2">
+      <div
-            <div className="flex items-center gap-1">
+        className={cn(
-              <Button
+          "relative flex items-end rounded-lg",
-                variant="ghost"
+          "bg-muted/50 ring-1 ring-border",
-                size="icon"
+          "focus-within:ring-2 focus-within:ring-ring",
-                className="h-7 w-7"
+          "transition-shadow",
-                onClick={() => editor.chain().focus().toggleBold().run()}
-                disabled={!editor.can().chain().focus().toggleBold().run()}
-              >
-                <Bold className={cn(
-                  "h-3.5 w-3.5",
-                  editor.isActive("bold") && "text-primary"
-                )} />
-              </Button>
-              <Button
-                variant="ghost"
-                size="icon"
-                className="h-7 w-7"
-                onClick={() => editor.chain().focus().toggleItalic().run()}
-                disabled={!editor.can().chain().focus().toggleItalic().run()}
-              >
-                <Italic className={cn(
-                  "h-3.5 w-3.5",
-                  editor.isActive("italic") && "text-primary"
-                )} />
-              </Button>
-              <Button
-                variant="ghost"
-                size="icon"
-                className="h-7 w-7"
-                onClick={() => editor.chain().focus().toggleCode().run()}
-                disabled={!editor.can().chain().focus().toggleCode().run()}
-              >
-                <Code className={cn(
-                  "h-3.5 w-3.5",
-                  editor.isActive("code") && "text-primary"
-                )} />
-              </Button>
-              <Button
-                variant="ghost"
-                size="icon"
-                className="h-7 w-7"
-                onClick={() => editor.chain().focus().toggleBulletList().run()}
-              >
-                <List className={cn(
-                  "h-3.5 w-3.5",
-                  editor.isActive("bulletList") && "text-primary"
-                )} />
-              </Button>
-              <Button
-                variant="ghost"
-                size="icon"
-                className="h-7 w-7"
-                onClick={() => editor.chain().focus().toggleOrderedList().run()}
-              >
-                <ListOrdered className={cn(
-                  "h-3.5 w-3.5",
-                  editor.isActive("orderedList") && "text-primary"
-                )} />
-              </Button>
-
-              <Separator orientation="vertical" className="mx-1 h-6" />
-
-              <Button variant="ghost" size="icon" className="h-7 w-7" disabled>
-                <Paperclip className="h-3.5 w-3.5" />
-              </Button>
-              <Button variant="ghost" size="icon" className="h-7 w-7">
-                <Smile className="h-3.5 w-3.5" />
-              </Button>
-            </div>
-
-            <Button
-              size="sm"
-              onClick={handleSend}
-              disabled={isSending || !editor.getText().trim()}
-            >
-              <Send className="mr-1.5 h-3.5 w-3.5" />
-              Send
-            </Button>
-          </div>
         )}
+      >
+        {/* + button */}
+        <button
+          type="button"
+          className={cn(
+            "flex h-[44px] w-[44px] shrink-0 items-center justify-center",
+            "text-muted-foreground",
+            "hover:text-foreground transition-colors",
+          )}
+          onClick={() => setShowToolbar((prev) => !prev)}
+          aria-label="Toggle formatting"
+        >
+          <Plus
+            className={cn(
+              "h-5 w-5 transition-transform duration-200",
+              showToolbar && "rotate-45",
+            )}
+          />
+        </button>
+
+        {/* editor area */}
+        <EditorContent
+          editor={editor}
+          className="composer-editor min-w-0 flex-1"
+        />
+
+        {/* right-side action icons */}
+        <div className="flex h-[44px] shrink-0 items-center gap-0 pr-1 sm:pr-1.5">
+          <button
+            type="button"
+            className={cn(
+              "hidden sm:flex",
+              "h-8 w-8 items-center justify-center rounded-md",
+              "text-muted-foreground hover:text-foreground transition-colors",
+            )}
+            aria-label="Stickers"
+          >
+            <Sticker className="h-[18px] w-[18px]" />
+          </button>
+          <button
+            type="button"
+            className={cn(
+              "hidden sm:flex",
+              "h-8 w-8 items-center justify-center rounded-md",
+              "text-muted-foreground hover:text-foreground transition-colors",
+            )}
+            aria-label="GIF"
+          >
+            <Gift className="h-[18px] w-[18px]" />
+          </button>
+
+          {/* emoji picker */}
+          <Popover open={emojiOpen} onOpenChange={setEmojiOpen}>
+            <PopoverTrigger asChild>
+              <button
+                type="button"
+                className={cn(
+                  "flex h-8 w-8 items-center justify-center rounded-md",
+                  "text-muted-foreground hover:text-foreground transition-colors",
+                  emojiOpen && "text-foreground",
+                )}
+                aria-label="Emoji"
+              >
+                <Smile className="h-[18px] w-[18px]" />
+              </button>
+            </PopoverTrigger>
+            <PopoverContent
+              side="top"
+              align="end"
+              sideOffset={8}
+              className="w-auto border-none bg-transparent p-0 shadow-none"
+            >
+              <React.Suspense
+                fallback={
+                  <div className="flex h-[350px] w-[352px] items-center justify-center rounded-lg border bg-popover">
+                    <p className="text-sm text-muted-foreground">
+                      Loading...
+                    </p>
+                  </div>
+                }
+              >
+                <div style={emojiThemeVars as React.CSSProperties}>
+                  <EmojiPicker
+                    onEmojiSelect={handleEmojiSelect}
+                    theme={resolvedTheme === "dark" ? "dark" : "light"}
+                    set="native"
+                    skinTonePosition="search"
+                    previewPosition="none"
+                    maxFrequentRows={2}
+                  />
+                </div>
+              </React.Suspense>
+            </PopoverContent>
+          </Popover>
+        </div>
       </div>
 
       {error && (
-        <p className="mt-2 text-xs text-destructive">{error}</p>
+        <p className="mt-1.5 text-xs text-destructive">{error}</p>
       )}
-
-      <p className="mt-2 text-xs text-muted-foreground">
-        <kbd className="rounded border bg-muted px-1.5 py-0.5 font-mono text-xs">Enter</kbd> to send,{" "}
-        <kbd className="rounded border bg-muted px-1.5 py-0.5 font-mono text-xs">Shift+Enter</kbd> for new line
-      </p>
     </div>
   )
 }

src/components/conversations/message-list.tsx

@@ -165,7 +165,7 @@ export function MessageList({ channelId, initialMessages }: MessageListProps) {
 
   if (messages.length === 0) {
     return (
-      <div className="flex min-h-0 flex-1 items-center justify-center p-8">
+      <div className="flex h-full min-h-0 items-center justify-center p-8 overflow-hidden">
         <p className="text-sm text-muted-foreground">
           No messages yet. Start the conversation!
         </p>
@@ -174,7 +174,7 @@ export function MessageList({ channelId, initialMessages }: MessageListProps) {
   }
 
   return (
-    <ScrollArea className="flex-1" ref={scrollRef}>
+    <ScrollArea className="h-full min-h-0 flex-1" ref={scrollRef}>
       <div className="flex flex-col gap-4 p-4">
         {hasMore && (
           <div className="flex justify-center">