From e07eefdcffd3fb214464f853abb2431a03b3b95c Mon Sep 17 00:00:00 2001
From: Taylor Ho <taylorkmho@gmail.com>
Date: Sat, 27 Jun 2026 10:20:15 -0700
Subject: [PATCH] refactor(desktop): centralize auxiliary panel header controls

- Move auxiliary panel header padding into shared layout constants so profile, activity, thread, and channel management panels share the same right inset.
- Add shared auxiliary header back-button rendering with a scoped negative margin so leading icon placement is consistent without per-panel padding variants.
- Add a fixed auxiliary header actions wrapper to standardize icon-button spacing in header action clusters.
- Move the Activity raw feed toggle into a settings dropdown next to the close action, matching the profile panel settings ingress pattern.
- Normalize related Tailwind shorthand classes while touching the auxiliary panel headers.

Co-authored-by: Taylor Ho <taylorkmho@gmail.com>
Signed-off-by: Taylor Ho <taylorkmho@gmail.com>
---
 .../channels/ui/AgentSessionThreadPanel.tsx   | 115 +++++++++++-------
 .../channels/ui/ChannelManagementSheet.tsx    |  40 +++---
 .../messages/ui/MessageThreadPanel.tsx        |  51 +++-----
 .../profile/ui/UserProfilePanelFrame.tsx      |  11 +-
 .../ui/UserProfilePanelHeaderContent.tsx      |  23 ++--
 .../shared/layout/AuxiliaryPanelHeader.tsx    |  46 ++++++-
 6 files changed, 164 insertions(+), 122 deletions(-)

diff --git a/desktop/src/features/channels/ui/AgentSessionThreadPanel.tsx b/desktop/src/features/channels/ui/AgentSessionThreadPanel.tsx
index 31996f24c2..4aaa1085d3 100644
--- a/desktop/src/features/channels/ui/AgentSessionThreadPanel.tsx
+++ b/desktop/src/features/channels/ui/AgentSessionThreadPanel.tsx
@@ -1,5 +1,5 @@
 import * as React from "react";
-import { ArrowLeft, CircleDot, Octagon, TerminalSquare, X } from "lucide-react";
+import { CircleDot, Octagon, Settings, TerminalSquare, X } from "lucide-react";
 import { toast } from "sonner";
 
 import { ManagedAgentSessionPanel } from "@/features/agents/ui/ManagedAgentSessionPanel";
@@ -12,9 +12,11 @@ import { useStickToBottom } from "@/shared/hooks/useStickToBottom";
 import { cn } from "@/shared/lib/cn";
 import {
   AuxiliaryPanelHeader,
+  AuxiliaryPanelHeaderActions,
   AuxiliaryPanelHeaderGroup,
   AuxiliaryPanelTitle,
   auxiliaryPanelContentPaddingClass,
+  auxiliaryPanelHeaderPaddingClass,
 } from "@/shared/layout/AuxiliaryPanelHeader";
 import { Badge } from "@/shared/ui/badge";
 import { Button } from "@/shared/ui/button";
@@ -28,6 +30,12 @@ import {
 import { THREAD_PANEL_MIN_WIDTH_PX } from "@/shared/hooks/useThreadPanelWidth";
 import { Switch } from "@/shared/ui/switch";
 import { Tooltip, TooltipContent, TooltipTrigger } from "@/shared/ui/tooltip";
+import {
+  DropdownMenu,
+  DropdownMenuContent,
+  DropdownMenuItem,
+  DropdownMenuTrigger,
+} from "@/shared/ui/dropdown-menu";
 import type { ChannelAgentSessionAgent } from "./useChannelAgentSessions";
 
 type AgentSessionThreadPanelProps = {
@@ -63,6 +71,7 @@ export function AgentSessionThreadPanel({
 
   const { ref: scrollRef, onScroll } = useStickToBottom<HTMLDivElement>();
   const rawFeedScopeKey = `${agent.pubkey}:${channel?.id ?? "all"}`;
+  const rawFeedSwitchId = React.useId();
   const [rawFeedState, setRawFeedState] = React.useState(() => ({
     scopeKey: rawFeedScopeKey,
     show: false,
@@ -96,7 +105,7 @@ export function AgentSessionThreadPanel({
   }
 
   const agentHeaderActions = (
-    <div className="ml-auto flex shrink-0 items-center gap-2">
+    <AuxiliaryPanelHeaderActions>
       {isLive && isWorking ? (
         <Badge className="shrink-0 gap-1 px-2 py-0 text-2xs" variant="default">
           <CircleDot className="h-2.5 w-2.5" />
@@ -104,32 +113,57 @@ export function AgentSessionThreadPanel({
         </Badge>
       ) : null}
       {isLive ? (
-        <div
-          className="flex min-w-19 shrink-0 items-center justify-end gap-2"
-          title={
-            showRawFeed
-              ? "Hide raw JSON-RPC payloads."
-              : channel
-                ? "Show raw JSON-RPC payloads for this channel."
-                : "Show raw JSON-RPC payloads for this agent."
-          }
-        >
-          <label
-            className="flex shrink-0 items-center gap-1.5 text-xs font-medium text-muted-foreground"
-            htmlFor="agent-session-raw-feed-switch"
+        <DropdownMenu modal={false}>
+          <DropdownMenuTrigger asChild>
+            <Button
+              aria-label="Open activity settings"
+              data-testid="agent-session-settings-menu-trigger"
+              size="icon"
+              title="Activity settings"
+              type="button"
+              variant="ghost"
+            >
+              <Settings />
+            </Button>
+          </DropdownMenuTrigger>
+          <DropdownMenuContent
+            align="end"
+            className="min-w-56"
+            onCloseAutoFocus={(event) => event.preventDefault()}
           >
-            <TerminalSquare className="h-3 w-3" />
-            Raw
-          </label>
-          <Switch
-            aria-label={showRawFeed ? "Hide raw feed" : "Show raw feed"}
-            checked={showRawFeed}
-            className="shrink-0 data-[state=unchecked]:bg-muted-foreground/45 [&>span]:bg-white"
-            data-testid="agent-session-toggle-raw-feed"
-            id="agent-session-raw-feed-switch"
-            onCheckedChange={handleRawFeedChange}
-          />
-        </div>
+            <DropdownMenuItem
+              className="gap-3 pr-2"
+              onSelect={(event) => {
+                event.preventDefault();
+                handleRawFeedChange(!showRawFeed);
+              }}
+              title={
+                showRawFeed
+                  ? "Hide raw JSON-RPC payloads."
+                  : channel
+                    ? "Show raw JSON-RPC payloads for this channel."
+                    : "Show raw JSON-RPC payloads for this agent."
+              }
+            >
+              <TerminalSquare className="h-4 w-4 text-muted-foreground" />
+              <label
+                className="min-w-0 flex-1 text-sm font-medium"
+                htmlFor={rawFeedSwitchId}
+              >
+                Raw activity
+              </label>
+              <Switch
+                aria-label={showRawFeed ? "Hide raw feed" : "Show raw feed"}
+                checked={showRawFeed}
+                className="shrink-0 data-[state=unchecked]:bg-muted-foreground/45 [&>span]:bg-white"
+                data-testid="agent-session-toggle-raw-feed"
+                id={rawFeedSwitchId}
+                onCheckedChange={handleRawFeedChange}
+                onClick={(event) => event.stopPropagation()}
+              />
+            </DropdownMenuItem>
+          </DropdownMenuContent>
+        </DropdownMenu>
       ) : null}
       {isLive && isWorking ? (
         <Tooltip>
@@ -167,23 +201,16 @@ export function AgentSessionThreadPanel({
       >
         <X />
       </Button>
-    </div>
+    </AuxiliaryPanelHeaderActions>
   );
 
   const agentHeaderContent = (
     <>
-      <AuxiliaryPanelHeaderGroup>
-        <Button
-          aria-label="Back from activity"
-          className="shrink-0"
-          data-testid="agent-session-back"
-          onClick={onBackToProfile}
-          size="icon"
-          type="button"
-          variant="outline"
-        >
-          <ArrowLeft />
-        </Button>
+      <AuxiliaryPanelHeaderGroup
+        backButtonAriaLabel="Back from activity"
+        backButtonTestId="agent-session-back"
+        onBack={onBackToProfile}
+      >
         <AuxiliaryPanelTitle>
           {showRawFeed ? "Raw ACP Activity" : "Activity"}
         </AuxiliaryPanelTitle>
@@ -199,7 +226,7 @@ export function AgentSessionThreadPanel({
       className={cn(
         "min-h-0 flex-1 overflow-y-auto px-3 pb-4",
         isSplitLayout && auxiliaryPanelContentPaddingClass,
-        !isSplitLayout && (isFloatingOverlay ? "pt-4" : "pt-[3.25rem]"),
+        !isSplitLayout && (isFloatingOverlay ? "pt-4" : "pt-13"),
       )}
     >
       <ManagedAgentSessionPanel
@@ -248,7 +275,7 @@ export function AgentSessionThreadPanel({
         {!isOverlay ? (
           <div
             aria-hidden="true"
-            className="pointer-events-none absolute inset-x-0 top-0 z-40 h-[3.25rem] bg-background/75 backdrop-blur-md supports-[backdrop-filter]:bg-background/65 dark:bg-background/45 dark:backdrop-blur-xl dark:supports-[backdrop-filter]:bg-background/35"
+            className="pointer-events-none absolute inset-x-0 top-0 z-40 h-13 bg-background/75 backdrop-blur-md supports-backdrop-filter:bg-background/65 dark:bg-background/45 dark:backdrop-blur-xl dark:supports-backdrop-filter:bg-background/35"
           />
         ) : null}
 
@@ -256,8 +283,8 @@ export function AgentSessionThreadPanel({
           className={cn(
             "flex cursor-default select-none items-center",
             isSinglePanelView
-              ? `relative ${PANEL_SINGLE_COLUMN_HEADER_LAYER_CLASS} -mb-[3.25rem] min-h-[3.25rem] shrink-0 gap-2.5 bg-background/80 px-4 py-2 backdrop-blur-md supports-[backdrop-filter]:bg-background/70 sm:pl-6 sm:pr-3 dark:bg-background/70 dark:backdrop-blur-xl dark:supports-[backdrop-filter]:bg-background/55`
-              : "relative z-50 min-h-[3.25rem] shrink-0 gap-3 bg-background/80 px-5 py-2 backdrop-blur-md supports-[backdrop-filter]:bg-background/70 dark:bg-background/70 dark:backdrop-blur-xl dark:supports-[backdrop-filter]:bg-background/55",
+              ? `relative ${PANEL_SINGLE_COLUMN_HEADER_LAYER_CLASS} -mb-13 min-h-13 shrink-0 gap-2.5 bg-background/80 ${auxiliaryPanelHeaderPaddingClass} backdrop-blur-md supports-backdrop-filter:bg-background/70 dark:bg-background/70 dark:backdrop-blur-xl dark:supports-backdrop-filter:bg-background/55`
+              : `relative z-50 min-h-13 shrink-0 gap-3 bg-background/80 ${auxiliaryPanelHeaderPaddingClass} backdrop-blur-md supports-backdrop-filter:bg-background/70 dark:bg-background/70 dark:backdrop-blur-xl dark:supports-backdrop-filter:bg-background/55`,
           )}
           data-tauri-drag-region
         >
diff --git a/desktop/src/features/channels/ui/ChannelManagementSheet.tsx b/desktop/src/features/channels/ui/ChannelManagementSheet.tsx
index 59c922af4e..588c7d5e38 100644
--- a/desktop/src/features/channels/ui/ChannelManagementSheet.tsx
+++ b/desktop/src/features/channels/ui/ChannelManagementSheet.tsx
@@ -54,6 +54,7 @@ import { Input } from "@/shared/ui/input";
 import { Textarea } from "@/shared/ui/textarea";
 import {
   AuxiliaryPanelHeader,
+  AuxiliaryPanelHeaderActions,
   AuxiliaryPanelHeaderGroup,
   AuxiliaryPanelTitle,
   auxiliaryPanelContentPaddingClass,
@@ -320,7 +321,7 @@ export function ChannelManagementSheet({
             "h-full w-full cursor-default overflow-hidden border-l-0 p-0",
             animateSplitEnter && PANEL_ENTER_MOTION_CLASS,
             isDark
-              ? "bg-background/85 backdrop-blur-xl supports-[backdrop-filter]:bg-background/75"
+              ? "bg-background/85 backdrop-blur-xl supports-backdrop-filter:bg-background/75"
               : "bg-background",
           )}
           data-testid="channel-management-sheet"
@@ -368,7 +369,7 @@ export function ChannelManagementSheet({
               PANEL_ENTER_MOTION_CLASS,
               "w-[380px] cursor-default overflow-hidden p-0 data-[state=closed]:animate-out data-[state=closed]:slide-out-to-right data-[state=closed]:duration-200",
               isDark
-                ? "bg-background/85 backdrop-blur-xl supports-[backdrop-filter]:bg-background/75"
+                ? "bg-background/85 backdrop-blur-xl supports-backdrop-filter:bg-background/75"
                 : "bg-background",
             )}
             data-testid="channel-management-sheet"
@@ -681,30 +682,25 @@ function ChannelManagementPanelContent({
     <>
       {isSplitLayout ? (
         <AuxiliaryPanelHeader>
-          <AuxiliaryPanelHeaderGroup>
-            {activeView === "canvas" ? (
-              <Button
-                aria-label="Back to channel"
-                className="shrink-0"
-                data-testid="channel-management-back"
-                onClick={() => setActiveView("summary")}
-                size="icon"
-                type="button"
-                variant="outline"
-              >
-                <ChevronLeft />
-              </Button>
-            ) : null}
+          <AuxiliaryPanelHeaderGroup
+            backButtonAriaLabel="Back to channel"
+            backButtonTestId="channel-management-back"
+            onBack={
+              activeView === "canvas"
+                ? () => setActiveView("summary")
+                : undefined
+            }
+          >
             <DialogPrimitive.Title asChild>
               <AuxiliaryPanelTitle>
                 {activeView === "canvas" ? "Canvas" : "Channel"}
               </AuxiliaryPanelTitle>
             </DialogPrimitive.Title>
           </AuxiliaryPanelHeaderGroup>
-          <div className="ml-auto flex shrink-0 items-center gap-2">
+          <AuxiliaryPanelHeaderActions>
             <Button
               aria-label="Close channel management"
-              className="relative z-[60]"
+              className="relative z-60"
               data-testid="channel-management-close"
               onClick={() => onOpenChange(false)}
               onPointerDown={(event) => {
@@ -718,7 +714,7 @@ function ChannelManagementPanelContent({
             >
               <X />
             </Button>
-          </div>
+          </AuxiliaryPanelHeaderActions>
           <DialogPrimitive.Description className="sr-only">
             Channel settings
           </DialogPrimitive.Description>
@@ -728,8 +724,8 @@ function ChannelManagementPanelContent({
           className={cn(
             "relative z-10 flex min-h-11 flex-row items-center gap-3 space-y-0 border-b border-border/35 px-3 py-1.5 text-left shadow-none",
             isDark
-              ? "bg-background/70 backdrop-blur-xl supports-[backdrop-filter]:bg-background/55"
-              : "bg-background/80 backdrop-blur-md supports-[backdrop-filter]:bg-background/70",
+              ? "bg-background/70 backdrop-blur-xl supports-backdrop-filter:bg-background/55"
+              : "bg-background/80 backdrop-blur-md supports-backdrop-filter:bg-background/70",
           )}
         >
           <div className="flex min-w-0 flex-1 items-center gap-1.5">
@@ -751,7 +747,7 @@ function ChannelManagementPanelContent({
           </div>
           <Button
             aria-label="Close channel management"
-            className="relative z-[60]"
+            className="relative z-60"
             data-testid="channel-management-close"
             onClick={() => onOpenChange(false)}
             onPointerDown={(event) => {
diff --git a/desktop/src/features/messages/ui/MessageThreadPanel.tsx b/desktop/src/features/messages/ui/MessageThreadPanel.tsx
index b45449e8f0..0a22f25d6a 100644
--- a/desktop/src/features/messages/ui/MessageThreadPanel.tsx
+++ b/desktop/src/features/messages/ui/MessageThreadPanel.tsx
@@ -1,5 +1,5 @@
 import * as React from "react";
-import { ArrowDown, ArrowLeft, X } from "lucide-react";
+import { ArrowDown, X } from "lucide-react";
 
 import {
   buildThreadSummaryFromVisibleEntries,
@@ -19,6 +19,7 @@ import {
   AuxiliaryPanelHeaderGroup,
   AuxiliaryPanelTitle,
   auxiliaryPanelContentPaddingClass,
+  auxiliaryPanelHeaderPaddingClass,
 } from "@/shared/layout/AuxiliaryPanelHeader";
 import { Button } from "@/shared/ui/button";
 import {
@@ -233,19 +234,10 @@ export function MessageThreadPanelSkeleton({
 
   const threadHeaderContent = (
     <>
-      <AuxiliaryPanelHeaderGroup>
-        {isSinglePanelView ? (
-          <Button
-            aria-label="Back to conversation"
-            className="shrink-0"
-            onClick={onClose}
-            size="icon"
-            type="button"
-            variant="outline"
-          >
-            <ArrowLeft />
-          </Button>
-        ) : null}
+      <AuxiliaryPanelHeaderGroup
+        backButtonAriaLabel="Back to conversation"
+        onBack={isSinglePanelView ? onClose : undefined}
+      >
         <AuxiliaryPanelTitle>Thread</AuxiliaryPanelTitle>
       </AuxiliaryPanelHeaderGroup>
       <Button
@@ -266,7 +258,7 @@ export function MessageThreadPanelSkeleton({
       className={cn(
         "min-h-0 flex-1 overflow-y-auto overflow-x-hidden overscroll-contain pb-24 [overflow-anchor:none]",
         isSplitLayout && auxiliaryPanelContentPaddingClass,
-        !isSplitLayout && !isFloatingOverlay && "pt-[3.25rem]",
+        !isSplitLayout && !isFloatingOverlay && "pt-13",
       )}
       data-testid="message-thread-loading"
     >
@@ -323,8 +315,8 @@ export function MessageThreadPanelSkeleton({
           className={cn(
             "flex cursor-default select-none items-center",
             isSinglePanelView
-              ? `relative ${PANEL_SINGLE_COLUMN_HEADER_LAYER_CLASS} -mb-[3.25rem] min-h-[3.25rem] shrink-0 gap-2.5 bg-background/80 px-4 py-2 backdrop-blur-md supports-[backdrop-filter]:bg-background/70 sm:pr-3 dark:bg-background/70 dark:backdrop-blur-xl dark:supports-[backdrop-filter]:bg-background/55`
-              : "relative z-50 min-h-[3.25rem] shrink-0 gap-3 bg-background/80 px-5 py-2 backdrop-blur-md supports-[backdrop-filter]:bg-background/70 dark:bg-background/70 dark:backdrop-blur-xl dark:supports-[backdrop-filter]:bg-background/55",
+              ? `relative ${PANEL_SINGLE_COLUMN_HEADER_LAYER_CLASS} -mb-13 min-h-13 shrink-0 gap-2.5 bg-background/80 ${auxiliaryPanelHeaderPaddingClass} backdrop-blur-md supports-backdrop-filter:bg-background/70 dark:bg-background/70 dark:backdrop-blur-xl dark:supports-backdrop-filter:bg-background/55`
+              : `relative z-50 min-h-13 shrink-0 gap-3 bg-background/80 ${auxiliaryPanelHeaderPaddingClass} backdrop-blur-md supports-backdrop-filter:bg-background/70 dark:bg-background/70 dark:backdrop-blur-xl dark:supports-backdrop-filter:bg-background/55`,
           )}
           data-tauri-drag-region
         >
@@ -614,7 +606,7 @@ export function MessageThreadPanel({
       className={cn(
         "min-h-0 flex-1 overflow-y-auto overflow-x-hidden overscroll-contain pb-24 [overflow-anchor:none]",
         isSplitLayout && auxiliaryPanelContentPaddingClass,
-        !isSplitLayout && !isFloatingOverlay && "pt-[3.25rem]",
+        !isSplitLayout && !isFloatingOverlay && "pt-13",
       )}
       data-testid="message-thread-body"
       onScroll={onScroll}
@@ -910,20 +902,11 @@ export function MessageThreadPanel({
 
   const threadHeaderContent = (
     <>
-      <AuxiliaryPanelHeaderGroup>
-        {isSinglePanelView ? (
-          <Button
-            aria-label="Back to conversation"
-            className="shrink-0"
-            data-testid="message-thread-back"
-            onClick={onClose}
-            size="icon"
-            type="button"
-            variant="outline"
-          >
-            <ArrowLeft />
-          </Button>
-        ) : null}
+      <AuxiliaryPanelHeaderGroup
+        backButtonAriaLabel="Back to conversation"
+        backButtonTestId="message-thread-back"
+        onBack={isSinglePanelView ? onClose : undefined}
+      >
         <AuxiliaryPanelTitle>Thread</AuxiliaryPanelTitle>
       </AuxiliaryPanelHeaderGroup>
       <Button
@@ -970,8 +953,8 @@ export function MessageThreadPanel({
           className={cn(
             "flex cursor-default select-none items-center",
             isSinglePanelView
-              ? `relative ${PANEL_SINGLE_COLUMN_HEADER_LAYER_CLASS} -mb-[3.25rem] min-h-[3.25rem] shrink-0 gap-2.5 bg-background/80 px-4 py-2 backdrop-blur-md supports-[backdrop-filter]:bg-background/70 sm:pr-3 dark:bg-background/70 dark:backdrop-blur-xl dark:supports-[backdrop-filter]:bg-background/55`
-              : "relative z-50 min-h-[3.25rem] shrink-0 gap-3 bg-background/80 px-5 py-2 backdrop-blur-md supports-[backdrop-filter]:bg-background/70 dark:bg-background/70 dark:backdrop-blur-xl dark:supports-[backdrop-filter]:bg-background/55",
+              ? `relative ${PANEL_SINGLE_COLUMN_HEADER_LAYER_CLASS} -mb-13 min-h-13 shrink-0 gap-2.5 bg-background/80 ${auxiliaryPanelHeaderPaddingClass} backdrop-blur-md supports-backdrop-filter:bg-background/70 dark:bg-background/70 dark:backdrop-blur-xl dark:supports-backdrop-filter:bg-background/55`
+              : `relative z-50 min-h-13 shrink-0 gap-3 bg-background/80 ${auxiliaryPanelHeaderPaddingClass} backdrop-blur-md supports-backdrop-filter:bg-background/70 dark:bg-background/70 dark:backdrop-blur-xl dark:supports-backdrop-filter:bg-background/55`,
           )}
           data-tauri-drag-region
         >
diff --git a/desktop/src/features/profile/ui/UserProfilePanelFrame.tsx b/desktop/src/features/profile/ui/UserProfilePanelFrame.tsx
index ba0d1f831f..4e739e70d6 100644
--- a/desktop/src/features/profile/ui/UserProfilePanelFrame.tsx
+++ b/desktop/src/features/profile/ui/UserProfilePanelFrame.tsx
@@ -1,7 +1,10 @@
 import type * as React from "react";
 
 import { THREAD_PANEL_MIN_WIDTH_PX } from "@/shared/hooks/useThreadPanelWidth";
-import { AuxiliaryPanelHeader } from "@/shared/layout/AuxiliaryPanelHeader";
+import {
+  AuxiliaryPanelHeader,
+  auxiliaryPanelHeaderPaddingClass,
+} from "@/shared/layout/AuxiliaryPanelHeader";
 import { cn } from "@/shared/lib/cn";
 import {
   OverlayPanelBackdrop,
@@ -111,10 +114,10 @@ export function UserProfilePanelFrame({
           className={cn(
             "flex cursor-default select-none items-center",
             isSinglePanelView
-              ? `relative ${PANEL_SINGLE_COLUMN_HEADER_LAYER_CLASS} -mb-13 min-h-13 shrink-0 gap-2.5 bg-transparent px-4 py-2 sm:pl-6 sm:pr-3`
+              ? `relative ${PANEL_SINGLE_COLUMN_HEADER_LAYER_CLASS} -mb-13 min-h-13 shrink-0 gap-2.5 bg-transparent ${auxiliaryPanelHeaderPaddingClass}`
               : isOverlay
-                ? "relative z-50 min-h-13 shrink-0 gap-3 bg-background/80 px-5 py-2 backdrop-blur-md supports-backdrop-filter:bg-background/70 dark:bg-background/70 dark:backdrop-blur-xl dark:supports-backdrop-filter:bg-background/55"
-                : "absolute inset-x-0 top-0 z-50 min-h-13 gap-3 bg-transparent px-3 py-2 after:absolute after:bottom-0 after:-left-px after:top-0 after:w-px after:bg-border/45 after:transition-colors peer-hover/profile-resize:after:bg-border/80 peer-focus-visible/profile-resize:after:bg-border/80",
+                ? `relative z-50 min-h-13 shrink-0 gap-3 bg-background/80 ${auxiliaryPanelHeaderPaddingClass} backdrop-blur-md supports-backdrop-filter:bg-background/70 dark:bg-background/70 dark:backdrop-blur-xl dark:supports-backdrop-filter:bg-background/55`
+                : `absolute inset-x-0 top-0 z-50 min-h-13 gap-3 bg-transparent ${auxiliaryPanelHeaderPaddingClass} after:absolute after:bottom-0 after:-left-px after:top-0 after:w-px after:bg-border/45 after:transition-colors peer-hover/profile-resize:after:bg-border/80 peer-focus-visible/profile-resize:after:bg-border/80`,
           )}
           data-tauri-drag-region
         >
diff --git a/desktop/src/features/profile/ui/UserProfilePanelHeaderContent.tsx b/desktop/src/features/profile/ui/UserProfilePanelHeaderContent.tsx
index ab9e3f0c0c..013f5345ae 100644
--- a/desktop/src/features/profile/ui/UserProfilePanelHeaderContent.tsx
+++ b/desktop/src/features/profile/ui/UserProfilePanelHeaderContent.tsx
@@ -1,5 +1,5 @@
 import type { ReactNode } from "react";
-import { ArrowLeft, X } from "lucide-react";
+import { X } from "lucide-react";
 
 import { CopyButton } from "@/features/agents/ui/CopyButton";
 import { MemoryRefreshButton } from "@/features/agent-memory/ui/MemorySection";
@@ -8,6 +8,7 @@ import {
   type ProfilePanelView,
 } from "@/features/profile/ui/UserProfilePanelUtils";
 import {
+  AuxiliaryPanelHeaderActions,
   AuxiliaryPanelHeaderGroup,
   AuxiliaryPanelTitle,
 } from "@/shared/layout/AuxiliaryPanelHeader";
@@ -37,21 +38,11 @@ export function getUserProfilePanelHeaderContent({
     (view === "diagnostics" || view === "logs") && Boolean(logSubtitle);
   const headerLeftContent = (
     <AuxiliaryPanelHeaderGroup
+      backButtonAriaLabel="Back to profile"
+      backButtonTestId="user-profile-panel-back"
       className={shouldShowLogDetails ? "items-start" : undefined}
+      onBack={view !== "summary" ? onBack : undefined}
     >
-      {view !== "summary" ? (
-        <Button
-          aria-label="Back to profile"
-          className={shouldShowLogDetails ? "mt-0.5 shrink-0" : "shrink-0"}
-          data-testid="user-profile-panel-back"
-          onClick={onBack}
-          size="icon"
-          type="button"
-          variant="outline"
-        >
-          <ArrowLeft />
-        </Button>
-      ) : null}
       {shouldShowLogDetails ? (
         <div className="min-w-0 flex-1">
           <AuxiliaryPanelTitle className="translate-y-0 leading-5">
@@ -70,7 +61,7 @@ export function getUserProfilePanelHeaderContent({
     </AuxiliaryPanelHeaderGroup>
   );
   const headerActions = (
-    <div className="ml-auto flex shrink-0 items-center gap-2">
+    <AuxiliaryPanelHeaderActions>
       {view === "memories" && viewerIsOwner && effectivePubkey ? (
         <MemoryRefreshButton
           agentPubkey={effectivePubkey}
@@ -99,7 +90,7 @@ export function getUserProfilePanelHeaderContent({
       >
         <X />
       </Button>
-    </div>
+    </AuxiliaryPanelHeaderActions>
   );
 
   return { headerActions, headerLeftContent };
diff --git a/desktop/src/shared/layout/AuxiliaryPanelHeader.tsx b/desktop/src/shared/layout/AuxiliaryPanelHeader.tsx
index 406354b9ed..cec6d0b0b1 100644
--- a/desktop/src/shared/layout/AuxiliaryPanelHeader.tsx
+++ b/desktop/src/shared/layout/AuxiliaryPanelHeader.tsx
@@ -1,12 +1,24 @@
 import type * as React from "react";
+import { ArrowLeft } from "lucide-react";
 
 import { channelChrome } from "@/shared/layout/chromeLayout";
 import { cn } from "@/shared/lib/cn";
+import { Button } from "@/shared/ui/button";
 
 type AuxiliaryPanelHeaderProps = React.ComponentProps<"div">;
-type AuxiliaryPanelHeaderGroupProps = React.ComponentProps<"div">;
+type AuxiliaryPanelHeaderGroupProps = React.ComponentProps<"div"> & {
+  backButtonAriaLabel?: string;
+  backButtonTestId?: string;
+  onBack?: () => void;
+};
+type AuxiliaryPanelHeaderActionsProps = {
+  children: React.ReactNode;
+};
 type AuxiliaryPanelTitleProps = React.ComponentProps<"h2">;
 
+export const auxiliaryPanelHeaderRightPaddingClass = "pr-2";
+export const auxiliaryPanelHeaderPaddingClass = `pl-5 ${auxiliaryPanelHeaderRightPaddingClass} py-2`;
+
 /** Compact title/action row for right auxiliary panels in split layouts. */
 export function AuxiliaryPanelHeader({
   className,
@@ -23,7 +35,10 @@ export function AuxiliaryPanelHeader({
       {...props}
     >
       <div
-        className="pointer-events-auto relative z-30 shrink-0 cursor-default select-none px-5 py-2"
+        className={cn(
+          "pointer-events-auto relative z-30 shrink-0 cursor-default select-none",
+          auxiliaryPanelHeaderPaddingClass,
+        )}
         data-tauri-drag-region
       >
         <div className="flex h-9 min-w-0 items-center gap-2.5">{children}</div>
@@ -35,8 +50,11 @@ export function AuxiliaryPanelHeader({
 export const auxiliaryPanelContentPaddingClass = channelChrome.contentPadding;
 
 export function AuxiliaryPanelHeaderGroup({
+  backButtonAriaLabel = "Back",
+  backButtonTestId,
   className,
   children,
+  onBack,
   ...props
 }: AuxiliaryPanelHeaderGroupProps) {
   return (
@@ -44,11 +62,35 @@ export function AuxiliaryPanelHeaderGroup({
       className={cn("flex min-w-0 flex-1 items-center gap-1.5", className)}
       {...props}
     >
+      {onBack ? (
+        <Button
+          aria-label={backButtonAriaLabel}
+          // Header text needs a comfortable left inset, but a leading icon
+          // should visually sit closer to the panel edge. Keep the padding
+          // centralized on the header and pull only this shared button back.
+          className="-ml-2 shrink-0"
+          data-testid={backButtonTestId}
+          onClick={onBack}
+          size="icon"
+          type="button"
+          variant="outline"
+        >
+          <ArrowLeft />
+        </Button>
+      ) : null}
       {children}
     </div>
   );
 }
 
+export function AuxiliaryPanelHeaderActions({
+  children,
+}: AuxiliaryPanelHeaderActionsProps) {
+  return (
+    <div className="ml-auto flex shrink-0 items-center gap-0.5">{children}</div>
+  );
+}
+
 export function AuxiliaryPanelTitle({
   className,
   children,