diff --git a/desktop/src/features/messages/ui/MessageComposerToolbar.tsx b/desktop/src/features/messages/ui/MessageComposerToolbar.tsx
index ef7758dc9..5847c0c38 100644
--- a/desktop/src/features/messages/ui/MessageComposerToolbar.tsx
+++ b/desktop/src/features/messages/ui/MessageComposerToolbar.tsx
@@ -1,5 +1,5 @@
 import * as React from "react";
-import { AtSign, Paperclip, SendHorizontal } from "lucide-react";
+import { ArrowUp, AtSign, Paperclip } from "lucide-react";
 
 import { Button } from "@/shared/ui/button";
 import { ComposerEmojiPicker } from "./ComposerEmojiPicker";
@@ -67,14 +67,22 @@ export const MessageComposerToolbar = React.memo(
         </div>
 
         <Button
-          className="gap-2"
+          aria-label={isSending ? "Sending" : "Send message"}
+          className="rounded-full"
           data-testid="send-message"
           disabled={sendDisabled || isSending}
-          title="Send (Enter)"
+          title={isSending ? "Sending…" : "Send (Enter)"}
           type="submit"
+          size="icon"
         >
-          <SendHorizontal className="h-4 w-4" />
-          {isSending ? "Sending" : "Send"}
+          {isSending ? (
+            <span
+              aria-hidden
+              className="h-4 w-4 animate-spin rounded-full border-2 border-primary-foreground border-t-transparent"
+            />
+          ) : (
+            <ArrowUp className="h-4 w-4" aria-hidden />
+          )}
         </Button>
       </div>
     );
diff --git a/desktop/src/features/messages/ui/MessageRow.tsx b/desktop/src/features/messages/ui/MessageRow.tsx
index 01f1110f9..cd12db5cb 100644
--- a/desktop/src/features/messages/ui/MessageRow.tsx
+++ b/desktop/src/features/messages/ui/MessageRow.tsx
@@ -228,61 +228,65 @@ export const MessageRow = React.memo(
             </div>
           )}
 
-          <div className="min-w-0 flex-1 space-y-0.5">
-            <div className="flex min-w-0 flex-wrap items-center gap-x-2 gap-y-1">
-              {message.pubkey ? (
-                <UserProfilePopover pubkey={message.pubkey}>
-                  <button
-                    className="truncate rounded text-sm font-semibold tracking-tight hover:underline focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring"
-                    type="button"
-                  >
+          <div className="relative min-w-0 flex-1 space-y-0">
+            {/* Name + role only in flow — action bar + time are absolute so flex-wrap
+                cannot insert a full-width row between the username and the body. */}
+            <div className="flex min-w-0 flex-nowrap items-start gap-x-2 pr-[9.5rem] sm:pr-40">
+              <div className="flex min-w-0 flex-1 items-center gap-x-2">
+                {message.pubkey ? (
+                  <UserProfilePopover pubkey={message.pubkey}>
+                    <button
+                      className="min-w-0 truncate rounded pt-px text-left text-sm font-semibold leading-tight tracking-tight hover:underline focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring"
+                      type="button"
+                    >
+                      {message.author}
+                    </button>
+                  </UserProfilePopover>
+                ) : (
+                  <h3 className="min-w-0 truncate pt-px text-sm font-semibold leading-tight tracking-tight">
                     {message.author}
-                  </button>
-                </UserProfilePopover>
-              ) : (
-                <h3 className="truncate text-sm font-semibold tracking-tight">
-                  {message.author}
-                </h3>
-              )}
-              {message.role ? (
-                <p className="rounded-full bg-muted px-2 py-0.5 text-[10px] font-medium uppercase tracking-[0.14em] text-muted-foreground">
-                  {message.role}
-                </p>
-              ) : null}
-              <div className="ml-auto flex items-center gap-2 text-xs text-muted-foreground">
-                <MessageActionBar
-                  activeReplyTargetId={activeReplyTargetId}
-                  message={message}
-                  onDelete={onDelete}
-                  onEdit={onEdit}
-                  onReactionSelect={
-                    canToggleReactions ? handleReactionSelect : undefined
-                  }
-                  onReply={onReply}
-                  reactionErrorMessage={reactionErrorMessage}
-                  reactionPending={reactionPending}
-                  reactions={reactions}
-                />
-                {message.pending ? (
-                  <p className="font-medium uppercase tracking-[0.14em] text-primary/80">
-                    Sending
+                  </h3>
+                )}
+                {message.role ? (
+                  <p className="shrink-0 rounded-full bg-muted px-2 py-0.5 text-[10px] font-medium uppercase tracking-[0.14em] text-muted-foreground">
+                    {message.role}
                   </p>
                 ) : null}
-                {message.edited ? (
-                  <p
-                    className="text-muted-foreground/70"
-                    title="This message has been edited"
-                  >
-                    (edited)
-                  </p>
-                ) : null}
-                <MessageTimestamp
-                  createdAt={message.createdAt}
-                  time={message.time}
-                />
               </div>
             </div>
-            {renderBody()}
+            <div className="absolute right-0 top-0 z-10 flex items-start justify-end gap-2 pt-px text-xs text-muted-foreground">
+              <MessageActionBar
+                activeReplyTargetId={activeReplyTargetId}
+                message={message}
+                onDelete={onDelete}
+                onEdit={onEdit}
+                onReactionSelect={
+                  canToggleReactions ? handleReactionSelect : undefined
+                }
+                onReply={onReply}
+                reactionErrorMessage={reactionErrorMessage}
+                reactionPending={reactionPending}
+                reactions={reactions}
+              />
+              {message.pending ? (
+                <p className="shrink-0 font-medium uppercase tracking-[0.14em] text-primary/80">
+                  Sending
+                </p>
+              ) : null}
+              {message.edited ? (
+                <p
+                  className="shrink-0 text-muted-foreground/70"
+                  title="This message has been edited"
+                >
+                  (edited)
+                </p>
+              ) : null}
+              <MessageTimestamp
+                createdAt={message.createdAt}
+                time={message.time}
+              />
+            </div>
+            <div className="pt-1">{renderBody()}</div>
             <MessageReactions
               messageId={message.id}
               reactions={reactions}
diff --git a/desktop/src/features/sidebar/ui/AppSidebar.tsx b/desktop/src/features/sidebar/ui/AppSidebar.tsx
index f850bd77f..1f7530f4e 100644
--- a/desktop/src/features/sidebar/ui/AppSidebar.tsx
+++ b/desktop/src/features/sidebar/ui/AppSidebar.tsx
@@ -35,7 +35,6 @@ import {
   SidebarMenuButton,
   SidebarMenuItem,
   SidebarMenuSkeleton,
-  SidebarSeparator,
 } from "@/shared/ui/sidebar";
 
 // ---------------------------------------------------------------------------
@@ -610,8 +609,6 @@ export function AppSidebar({
         </SidebarMenu>
       </SidebarHeader>
 
-      <SidebarSeparator className="mx-0 w-full" />
-
       <SidebarContent>
         {isLoading ? (
           <SidebarGroup>
@@ -710,8 +707,6 @@ export function AppSidebar({
         ) : null}
       </SidebarContent>
 
-      <SidebarSeparator className="mx-0 w-full" />
-
       <SidebarFooter>
         <SidebarMenu>
           <SidebarMenuItem>
diff --git a/desktop/src/shared/ui/markdown.tsx b/desktop/src/shared/ui/markdown.tsx
index 1956a8ada..b0bbafb9d 100644
--- a/desktop/src/shared/ui/markdown.tsx
+++ b/desktop/src/shared/ui/markdown.tsx
@@ -237,7 +237,7 @@ function MarkdownInner({
     <div
       className={cn(
         tight
-          ? "max-w-none break-words text-sm leading-5 text-foreground/90 [&>*:first-child]:mt-0 [&>*:last-child]:mb-0 [&>*]:my-1"
+          ? "max-w-none break-words text-sm leading-5 text-foreground/90 [&>*:first-child]:mt-0 [&>*:last-child]:mb-0 [&>*]:my-0 [&>*+*]:mt-1"
           : compact
             ? "max-w-none break-words text-[15px] leading-6 text-foreground/90 [&>*:first-child]:mt-0 [&>*:last-child]:mb-0 [&>*]:my-1.5"
             : "max-w-none break-words text-sm leading-7 text-foreground/90 [&>*:first-child]:mt-0 [&>*:last-child]:mb-0 [&>*]:my-3",
diff --git a/desktop/src/shared/ui/sidebar.tsx b/desktop/src/shared/ui/sidebar.tsx
index 18707f2b9..999b80061 100644
--- a/desktop/src/shared/ui/sidebar.tsx
+++ b/desktop/src/shared/ui/sidebar.tsx
@@ -308,10 +308,10 @@ const SidebarRail = React.forwardRef<
       onClick={toggleSidebar}
       title="Toggle Sidebar"
       className={cn(
-        "absolute inset-y-0 z-20 hidden w-4 -translate-x-1/2 transition-all ease-linear after:absolute after:inset-y-0 after:left-1/2 after:w-[2px] hover:after:bg-sidebar-border group-data-[side=left]:-right-4 group-data-[side=right]:left-0 sm:flex",
+        "absolute inset-y-0 z-20 hidden w-4 -translate-x-1/2 transition-all ease-linear group-data-[side=left]:-right-4 group-data-[side=right]:left-0 sm:flex",
         "[[data-side=left]_&]:cursor-w-resize [[data-side=right]_&]:cursor-e-resize",
         "[[data-side=left][data-state=collapsed]_&]:cursor-e-resize [[data-side=right][data-state=collapsed]_&]:cursor-w-resize",
-        "group-data-[collapsible=offcanvas]:translate-x-0 group-data-[collapsible=offcanvas]:after:left-full group-data-[collapsible=offcanvas]:hover:bg-sidebar",
+        "group-data-[collapsible=offcanvas]:translate-x-0 group-data-[collapsible=offcanvas]:hover:bg-sidebar",
         "[[data-side=left][data-collapsible=offcanvas]_&]:-right-2",
         "[[data-side=right][data-collapsible=offcanvas]_&]:-left-2",
         className,
@@ -698,7 +698,7 @@ const SidebarMenuSub = React.forwardRef<
     ref={ref}
     data-sidebar="menu-sub"
     className={cn(
-      "mx-3.5 flex min-w-0 translate-x-px flex-col gap-1 border-l border-sidebar-border px-2.5 py-0.5",
+      "mx-3.5 flex min-w-0 flex-col gap-1 px-2.5 py-0.5",
       "group-data-[collapsible=icon]:hidden",
       className,
     )}
@@ -730,7 +730,7 @@ const SidebarMenuSubButton = React.forwardRef<
       data-size={size}
       data-active={isActive}
       className={cn(
-        "flex h-7 min-w-0 -translate-x-px items-center gap-2 overflow-hidden rounded-md px-2 text-sidebar-foreground outline-none ring-sidebar-ring hover:bg-sidebar-accent hover:text-sidebar-accent-foreground focus-visible:ring-2 active:bg-sidebar-accent active:text-sidebar-accent-foreground disabled:pointer-events-none disabled:opacity-50 aria-disabled:pointer-events-none aria-disabled:opacity-50 [&>span:last-child]:truncate [&>svg]:size-4 [&>svg]:shrink-0 [&>svg]:text-sidebar-accent-foreground data-[active=true]:[&>svg]:text-sidebar-primary-foreground",
+        "flex h-7 min-w-0 items-center gap-2 overflow-hidden rounded-md px-2 text-sidebar-foreground outline-none ring-sidebar-ring hover:bg-sidebar-accent hover:text-sidebar-accent-foreground focus-visible:ring-2 active:bg-sidebar-accent active:text-sidebar-accent-foreground disabled:pointer-events-none disabled:opacity-50 aria-disabled:pointer-events-none aria-disabled:opacity-50 [&>span:last-child]:truncate [&>svg]:size-4 [&>svg]:shrink-0 [&>svg]:text-sidebar-accent-foreground data-[active=true]:[&>svg]:text-sidebar-primary-foreground",
         "data-[active=true]:bg-sidebar-primary data-[active=true]:font-semibold data-[active=true]:text-sidebar-primary-foreground data-[active=true]:hover:bg-sidebar-primary data-[active=true]:hover:text-sidebar-primary-foreground",
         size === "sm" && "text-xs",
         size === "md" && "text-sm",
diff --git a/desktop/tests/e2e/smoke.spec.ts b/desktop/tests/e2e/smoke.spec.ts
index 21c958cae..bd159aa37 100644
--- a/desktop/tests/e2e/smoke.spec.ts
+++ b/desktop/tests/e2e/smoke.spec.ts
@@ -262,7 +262,10 @@ test("supports multiline drafts with Ctrl+Enter and sends with Enter", async ({
   await page.goto("/");
   await page.getByTestId("channel-general").click();
   await expect(page.getByTestId("chat-title")).toHaveText("general");
-  await expect(page.getByTestId("send-message")).toContainText("Send");
+  await expect(page.getByTestId("send-message")).toHaveAttribute(
+    "title",
+    "Send (Enter)",
+  );
   const initialInputHeight = await input.evaluate(
     (element) => (element as HTMLTextAreaElement).clientHeight,
   );