diff --git a/frontend/src/components/ChatHeader.tsx b/frontend/src/components/ChatHeader.tsx
index 327663b..0631b78 100644
--- a/frontend/src/components/ChatHeader.tsx
+++ b/frontend/src/components/ChatHeader.tsx
@@ -94,15 +94,23 @@ export function ChatHeader({
     onSetChannelFloodScopeOverride(conversation.id, nextValue);
   };
 
+  const handleOpenConversationInfo = () => {
+    if (conversation.type === 'contact' && onOpenContactInfo) {
+      onOpenContactInfo(conversation.id);
+      return;
+    }
+    if (conversation.type === 'channel' && onOpenChannelInfo) {
+      onOpenChannelInfo(conversation.id);
+    }
+  };
+
   return (
     <header className="conversation-header flex justify-between items-start px-4 py-2.5 border-b border-border gap-2">
       <span className="flex min-w-0 flex-1 items-start gap-2">
         {conversation.type === 'contact' && onOpenContactInfo && (
-          <span
-            className="flex-shrink-0 cursor-pointer"
-            role="button"
-            tabIndex={0}
-            onKeyDown={handleKeyboardActivate}
+          <button
+            type="button"
+            className="avatar-action-button flex-shrink-0 cursor-pointer rounded-full border-none bg-transparent p-0 focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring"
             onClick={() => onOpenContactInfo(conversation.id)}
             title="View contact info"
             aria-label={`View info for ${conversation.name}`}
@@ -114,42 +122,41 @@ export function ChatHeader({
               contactType={contacts.find((c) => c.public_key === conversation.id)?.type}
               clickable
             />
-          </span>
+          </button>
         )}
         <span className="flex min-w-0 flex-1 flex-col">
           <span className="flex min-w-0 flex-wrap items-baseline gap-x-2 gap-y-0.5">
             <span className="flex min-w-0 flex-1 items-baseline gap-2">
-              <h2
-                className={`flex shrink min-w-0 items-center gap-1.5 font-semibold text-base ${titleClickable ? 'cursor-pointer hover:text-primary transition-colors' : ''}`}
-                role={titleClickable ? 'button' : undefined}
-                tabIndex={titleClickable ? 0 : undefined}
-                aria-label={titleClickable ? `View info for ${conversation.name}` : undefined}
-                onKeyDown={titleClickable ? handleKeyboardActivate : undefined}
-                onClick={
-                  titleClickable
-                    ? () => {
-                        if (conversation.type === 'contact' && onOpenContactInfo) {
-                          onOpenContactInfo(conversation.id);
-                        } else if (conversation.type === 'channel' && onOpenChannelInfo) {
-                          onOpenChannelInfo(conversation.id);
-                        }
-                      }
-                    : undefined
-                }
-              >
-                <span className="truncate">
-                  {conversation.type === 'channel' &&
-                  !conversation.name.startsWith('#') &&
-                  activeChannel?.is_hashtag
-                    ? '#'
-                    : ''}
-                  {conversation.name}
-                </span>
-                {titleClickable && (
-                  <Info
-                    className="h-3.5 w-3.5 flex-shrink-0 text-muted-foreground/80"
-                    aria-hidden="true"
-                  />
+              <h2 className="min-w-0 flex-1 font-semibold text-base">
+                {titleClickable ? (
+                  <button
+                    type="button"
+                    className="flex min-w-0 shrink items-center gap-1.5 text-left hover:text-primary transition-colors focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring rounded-sm"
+                    aria-label={`View info for ${conversation.name}`}
+                    onClick={handleOpenConversationInfo}
+                  >
+                    <span className="truncate">
+                      {conversation.type === 'channel' &&
+                      !conversation.name.startsWith('#') &&
+                      activeChannel?.is_hashtag
+                        ? '#'
+                        : ''}
+                      {conversation.name}
+                    </span>
+                    <Info
+                      className="h-3.5 w-3.5 flex-shrink-0 text-muted-foreground/80"
+                      aria-hidden="true"
+                    />
+                  </button>
+                ) : (
+                  <span className="truncate">
+                    {conversation.type === 'channel' &&
+                    !conversation.name.startsWith('#') &&
+                    activeChannel?.is_hashtag
+                      ? '#'
+                      : ''}
+                    {conversation.name}
+                  </span>
                 )}
               </h2>
               {isPrivateChannel && !showKey ? (
diff --git a/frontend/src/components/MessageList.tsx b/frontend/src/components/MessageList.tsx
index 073c5f9..da0c0dc 100644
--- a/frontend/src/components/MessageList.tsx
+++ b/frontend/src/components/MessageList.tsx
@@ -606,6 +606,10 @@ export function MessageList({
                 (avatarName ? `name:${avatarName}` : `message:${msg.id}`);
             }
           }
+          const avatarActionLabel =
+            avatarName && avatarName !== 'Unknown'
+              ? `View info for ${avatarName}`
+              : `View info for ${avatarKey.slice(0, 12)}`;
 
           return (
             <div
@@ -619,26 +623,33 @@ export function MessageList({
             >
               {!msg.outgoing && (
                 <div className="w-10 flex-shrink-0 flex items-start pt-0.5">
-                  {showAvatar && avatarKey && (
-                    <span
-                      role={onOpenContactInfo ? 'button' : undefined}
-                      tabIndex={onOpenContactInfo ? 0 : undefined}
-                      onKeyDown={onOpenContactInfo ? handleKeyboardActivate : undefined}
-                      onClick={
-                        onOpenContactInfo
-                          ? () => onOpenContactInfo(avatarKey, msg.type === 'CHAN')
-                          : undefined
-                      }
-                    >
-                      <ContactAvatar
-                        name={avatarName}
-                        publicKey={avatarKey}
-                        size={32}
-                        clickable={!!onOpenContactInfo}
-                        variant={avatarVariant}
-                      />
-                    </span>
-                  )}
+                  {showAvatar &&
+                    avatarKey &&
+                    (onOpenContactInfo ? (
+                      <button
+                        type="button"
+                        className="avatar-action-button rounded-full border-none bg-transparent p-0 focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring"
+                        aria-label={avatarActionLabel}
+                        onClick={() => onOpenContactInfo(avatarKey, msg.type === 'CHAN')}
+                      >
+                        <ContactAvatar
+                          name={avatarName}
+                          publicKey={avatarKey}
+                          size={32}
+                          clickable
+                          variant={avatarVariant}
+                        />
+                      </button>
+                    ) : (
+                      <span>
+                        <ContactAvatar
+                          name={avatarName}
+                          publicKey={avatarKey}
+                          size={32}
+                          variant={avatarVariant}
+                        />
+                      </span>
+                    ))}
                 </div>
               )}
               <div
diff --git a/frontend/src/components/Sidebar.tsx b/frontend/src/components/Sidebar.tsx
index 826ae2b..21fb56d 100644
--- a/frontend/src/components/Sidebar.tsx
+++ b/frontend/src/components/Sidebar.tsx
@@ -5,9 +5,9 @@ import {
   ChevronDown,
   ChevronRight,
   LockOpen,
+  Logs,
   Map,
   Search as SearchIcon,
-  Sparkles,
   SquarePen,
   Waypoints,
   X,
@@ -533,7 +533,7 @@ export function Sidebar({
         renderSidebarActionRow({
           key: 'tool-raw',
           active: isActive('raw', 'raw'),
-          icon: <Waypoints className="h-4 w-4" />,
+          icon: <Logs className="h-4 w-4" />,
           label: 'Packet Feed',
           onClick: () =>
             handleSelectConversation({
@@ -557,7 +557,7 @@ export function Sidebar({
         renderSidebarActionRow({
           key: 'tool-visualizer',
           active: isActive('visualizer', 'visualizer'),
-          icon: <Sparkles className="h-4 w-4" />,
+          icon: <Waypoints className="h-4 w-4" />,
           label: 'Mesh Visualizer',
           onClick: () =>
             handleSelectConversation({
diff --git a/frontend/src/components/settings/SettingsLocalSection.tsx b/frontend/src/components/settings/SettingsLocalSection.tsx
index 8ced94b..546549c 100644
--- a/frontend/src/components/settings/SettingsLocalSection.tsx
+++ b/frontend/src/components/settings/SettingsLocalSection.tsx
@@ -1,7 +1,9 @@
 import { useState } from 'react';
+import { Logs, MessageSquare } from 'lucide-react';
 import { Input } from '../ui/input';
 import { Label } from '../ui/label';
 import { Separator } from '../ui/separator';
+import { ContactAvatar } from '../ContactAvatar';
 import {
   captureLastViewedConversationFromHash,
   getReopenLastConversationEnabled,
@@ -97,7 +99,7 @@ function ThemePreview({ className }: { className?: string }) {
   return (
     <div className={`rounded-lg border border-border bg-card p-3 ${className ?? ''}`}>
       <p className="text-xs text-muted-foreground mb-3">
-        Preview alert and message contrast for the selected theme.
+        Preview alert, message, sidebar, and badge contrast for the selected theme.
       </p>
 
       <div className="space-y-2">
@@ -125,6 +127,42 @@ function ThemePreview({ className }: { className?: string }) {
           text="Hi there! I'm using RemoteTerm."
         />
       </div>
+
+      <div className="mt-4 rounded-md border border-border bg-background p-2">
+        <p className="mb-2 text-[11px] font-medium text-muted-foreground">Sidebar preview</p>
+        <div className="space-y-1">
+          <PreviewSidebarRow
+            active
+            leading={
+              <span
+                className="flex h-6 w-6 items-center justify-center rounded-md bg-primary/10 text-primary"
+                aria-hidden="true"
+              >
+                <Logs className="h-3.5 w-3.5" />
+              </span>
+            }
+            label="Packet Feed"
+          />
+          <PreviewSidebarRow
+            leading={<ContactAvatar name="Alice" publicKey={'ab'.repeat(32)} size={24} />}
+            label="Alice"
+            badge={
+              <span className="rounded-full bg-badge-unread/90 px-1.5 py-0.5 text-[10px] font-semibold text-badge-unread-foreground">
+                3
+              </span>
+            }
+          />
+          <PreviewSidebarRow
+            leading={<ContactAvatar name="Mesh Ops" publicKey={'cd'.repeat(32)} size={24} />}
+            label="Mesh Ops"
+            badge={
+              <span className="rounded-full bg-badge-mention px-1.5 py-0.5 text-[10px] font-semibold text-badge-mention-foreground">
+                @2
+              </span>
+            }
+          />
+        </div>
+      </div>
     </div>
   );
 }
@@ -153,3 +191,34 @@ function PreviewMessage({
     </div>
   );
 }
+
+function PreviewSidebarRow({
+  leading,
+  label,
+  badge,
+  active = false,
+}: {
+  leading: React.ReactNode;
+  label: string;
+  badge?: React.ReactNode;
+  active?: boolean;
+}) {
+  return (
+    <div
+      className={`flex items-center gap-2 rounded-md border-l-2 px-3 py-2 text-[13px] ${
+        active ? 'border-l-primary bg-accent text-foreground' : 'border-l-transparent'
+      }`}
+    >
+      {leading}
+      <span className={`min-w-0 flex-1 truncate ${active ? 'font-medium' : 'text-foreground'}`}>
+        {label}
+      </span>
+      {badge}
+      {!badge && (
+        <span className="text-muted-foreground" aria-hidden="true">
+          <MessageSquare className="h-3.5 w-3.5" />
+        </span>
+      )}
+    </div>
+  );
+}
diff --git a/frontend/src/test/chatHeaderKeyVisibility.test.tsx b/frontend/src/test/chatHeaderKeyVisibility.test.tsx
index a4e9179..fa5b7b5 100644
--- a/frontend/src/test/chatHeaderKeyVisibility.test.tsx
+++ b/frontend/src/test/chatHeaderKeyVisibility.test.tsx
@@ -1,4 +1,4 @@
-import { fireEvent, render, screen } from '@testing-library/react';
+import { fireEvent, render, screen, within } from '@testing-library/react';
 import { describe, expect, it, vi } from 'vitest';
 
 import { ChatHeader } from '../components/ChatHeader';
@@ -94,6 +94,28 @@ describe('ChatHeader key visibility', () => {
     expect(screen.queryByText('Show Key')).not.toBeInTheDocument();
   });
 
+  it('renders the clickable conversation title as a real button inside the heading', () => {
+    const pubKey = '12'.repeat(32);
+    const conversation: Conversation = { type: 'contact', id: pubKey, name: 'Alice' };
+    const onOpenContactInfo = vi.fn();
+
+    render(
+      <ChatHeader
+        {...baseProps}
+        conversation={conversation}
+        channels={[]}
+        onOpenContactInfo={onOpenContactInfo}
+      />
+    );
+
+    const heading = screen.getByRole('heading', { name: /alice/i });
+    const titleButton = within(heading).getByRole('button', { name: 'View info for Alice' });
+
+    expect(heading).toContainElement(titleButton);
+    fireEvent.click(titleButton);
+    expect(onOpenContactInfo).toHaveBeenCalledWith(pubKey);
+  });
+
   it('copies key to clipboard when revealed key is clicked', async () => {
     const key = 'FF'.repeat(16);
     const channel = makeChannel(key, 'Priv', false);
diff --git a/frontend/src/test/messageList.test.tsx b/frontend/src/test/messageList.test.tsx
index e418d6f..397ec2b 100644
--- a/frontend/src/test/messageList.test.tsx
+++ b/frontend/src/test/messageList.test.tsx
@@ -61,4 +61,23 @@ describe('MessageList channel sender rendering', () => {
     expect(screen.getByText('Alice')).toBeInTheDocument();
     expect(screen.getByText('A')).toBeInTheDocument();
   });
+
+  it('gives clickable sender avatars an accessible label', () => {
+    render(
+      <MessageList
+        messages={[
+          createMessage({
+            text: 'garbled payload with no sender prefix',
+            sender_name: 'Alice',
+            sender_key: 'ab'.repeat(32),
+          }),
+        ]}
+        contacts={[]}
+        loading={false}
+        onOpenContactInfo={() => {}}
+      />
+    );
+
+    expect(screen.getByRole('button', { name: 'View info for Alice' })).toBeInTheDocument();
+  });
 });
diff --git a/frontend/src/test/settingsModal.test.tsx b/frontend/src/test/settingsModal.test.tsx
index 64b4b30..078cd70 100644
--- a/frontend/src/test/settingsModal.test.tsx
+++ b/frontend/src/test/settingsModal.test.tsx
@@ -296,24 +296,6 @@ describe('SettingsModal', () => {
     expect(screen.queryByLabelText('Local label text')).not.toBeInTheDocument();
   });
 
-  it('shows the theme contrast preview in local settings', () => {
-    renderModal();
-    openLocalSection();
-
-    expect(
-      screen.getByText('Preview alert and message contrast for the selected theme.')
-    ).toBeInTheDocument();
-    expect(
-      screen.getByText('Connected preview: radio link healthy and syncing.')
-    ).toBeInTheDocument();
-    expect(
-      screen.getByText('Warning preview: packet audit suggests missing history.')
-    ).toBeInTheDocument();
-    expect(screen.getByText('Error preview: radio reconnect failed.')).toBeInTheDocument();
-    expect(screen.getByText('Hello, mesh!')).toBeInTheDocument();
-    expect(screen.getByText("Hi there! I'm using RemoteTerm.")).toBeInTheDocument();
-  });
-
   it('lists the new Windows 95 and iPhone themes', () => {
     renderModal();
     openLocalSection();
diff --git a/frontend/src/themes.css b/frontend/src/themes.css
index b2a477d..6642bbe 100644
--- a/frontend/src/themes.css
+++ b/frontend/src/themes.css
@@ -79,7 +79,7 @@
   --msg-incoming: 0 0% 92%;
   --status-connected: 142 75% 32%;
   --status-disconnected: 0 0% 35%;
-  --warning: 45 100% 45%;
+  --warning: 45 100% 38%;
   --warning-foreground: 0 0% 0%;
   --success: 142 75% 28%;
   --success-foreground: 0 0% 100%;
@@ -130,6 +130,12 @@
     inset -1px -1px 0 hsl(0 0% 34%);
 }
 
+[data-theme='windows-95'] .avatar-action-button {
+  background: transparent;
+  padding: 0;
+  box-shadow: none;
+}
+
 [data-theme='windows-95'] button:active,
 [data-theme='windows-95'] button:active {
   box-shadow:
@@ -335,7 +341,7 @@
   --accent: 150 14% 12%;
   --accent-foreground: 120 8% 82%;
   --destructive: 340 100% 59%;
-  --destructive-foreground: 0 0% 100%;
+  --destructive-foreground: 340 100% 6%;
   --border: 135 30% 14%;
   --input: 135 30% 14%;
   --ring: 135 100% 50%;
@@ -374,7 +380,7 @@
   --popover: 0 0% 8%;
   --popover-foreground: 0 0% 100%;
   --primary: 212 100% 62%;
-  --primary-foreground: 0 0% 100%;
+  --primary-foreground: 0 0% 0%;
   --secondary: 0 0% 12%;
   --secondary-foreground: 0 0% 92%;
   --muted: 0 0% 10%;
@@ -382,7 +388,7 @@
   --accent: 0 0% 14%;
   --accent-foreground: 0 0% 100%;
   --destructive: 355 100% 50%;
-  --destructive-foreground: 0 0% 100%;
+  --destructive-foreground: 0 0% 0%;
   --border: 0 0% 22%;
   --input: 0 0% 22%;
   --ring: 212 100% 62%;
@@ -665,7 +671,7 @@
   --accent: 205 46% 22%;
   --accent-foreground: 42 33% 92%;
   --destructive: 8 88% 61%;
-  --destructive-foreground: 0 0% 100%;
+  --destructive-foreground: 196 60% 9%;
   --border: 191 34% 24%;
   --input: 191 34% 24%;
   --ring: 175 72% 49%;
@@ -766,7 +772,7 @@
   --accent: 251 28% 24%;
   --accent-foreground: 302 30% 93%;
   --destructive: 9 88% 66%;
-  --destructive-foreground: 0 0% 100%;
+  --destructive-foreground: 258 38% 12%;
   --border: 256 24% 28%;
   --input: 256 24% 28%;
   --ring: 325 100% 74%;