Add desktop profile management UI (#25)

desktop/playwright.config.ts

@@ -29,7 +29,11 @@ export default defineConfig({
     },
     {
       name: "integration",
-      testMatch: ["**/stream.spec.ts", "**/integration.spec.ts"],
+      testMatch: [
+        "**/stream.spec.ts",
+        "**/integration.spec.ts",
+        "**/profile.spec.ts",
+      ],
       use: {
         ...devices["Desktop Chrome"],
       },

desktop/src-tauri/src/lib.rs

@@ -16,6 +16,15 @@ pub struct IdentityInfo {
     pub display_name: String,
 }
 
+#[derive(Serialize, Deserialize)]
+pub struct ProfileInfo {
+    pub pubkey: String,
+    pub display_name: Option<String>,
+    pub avatar_url: Option<String>,
+    pub about: Option<String>,
+    pub nip05_handle: Option<String>,
+}
+
 #[derive(Serialize, Deserialize)]
 pub struct ChannelInfo {
     pub id: String,
@@ -108,6 +117,16 @@ struct AddMembersBody<'a> {
     role: Option<&'a str>,
 }
 
+#[derive(Serialize)]
+struct UpdateProfileBody<'a> {
+    #[serde(skip_serializing_if = "Option::is_none")]
+    display_name: Option<&'a str>,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    avatar_url: Option<&'a str>,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    about: Option<&'a str>,
+}
+
 #[derive(Serialize)]
 struct GetFeedQuery<'a> {
     #[serde(skip_serializing_if = "Option::is_none")]
@@ -278,6 +297,46 @@ fn get_relay_ws_url() -> String {
     relay_ws_url()
 }
 
+#[tauri::command]
+async fn get_profile(state: tauri::State<'_, AppState>) -> Result<ProfileInfo, String> {
+    let request = build_authed_request(
+        &state.http_client,
+        Method::GET,
+        "/api/users/me/profile",
+        &state,
+    )?;
+    send_json_request(request).await
+}
+
+#[tauri::command]
+async fn update_profile(
+    display_name: Option<String>,
+    avatar_url: Option<String>,
+    about: Option<String>,
+    state: tauri::State<'_, AppState>,
+) -> Result<ProfileInfo, String> {
+    let request = build_authed_request(
+        &state.http_client,
+        Method::PUT,
+        "/api/users/me/profile",
+        &state,
+    )?
+    .json(&UpdateProfileBody {
+        display_name: display_name.as_deref(),
+        avatar_url: avatar_url.as_deref(),
+        about: about.as_deref(),
+    });
+    send_empty_request(request).await?;
+
+    let request = build_authed_request(
+        &state.http_client,
+        Method::GET,
+        "/api/users/me/profile",
+        &state,
+    )?;
+    send_json_request(request).await
+}
+
 #[tauri::command]
 fn sign_event(
     kind: u16,
@@ -558,6 +617,8 @@ pub fn run() {
         .manage(app_state)
         .invoke_handler(tauri::generate_handler![
             get_identity,
+            get_profile,
+            update_profile,
             get_relay_ws_url,
             sign_event,
             create_auth_event,

desktop/src/app/AppShell.tsx

@@ -19,6 +19,7 @@ import {
 import { formatTimelineMessages } from "@/features/messages/lib/formatTimelineMessages";
 import { MessageComposer } from "@/features/messages/ui/MessageComposer";
 import { MessageTimeline } from "@/features/messages/ui/MessageTimeline";
+import { ProfileSheet } from "@/features/profile/ui/ProfileSheet";
 import { SearchDialog } from "@/features/search/ui/SearchDialog";
 import { AppSidebar } from "@/features/sidebar/ui/AppSidebar";
 import { getEventById } from "@/shared/api/tauri";
@@ -45,6 +46,7 @@ export function AppShell() {
   const [selectedView, setSelectedView] = React.useState<AppView>("home");
   const [isChannelManagementOpen, setIsChannelManagementOpen] =
     React.useState(false);
+  const [isProfileOpen, setIsProfileOpen] = React.useState(false);
   const [isSearchOpen, setIsSearchOpen] = React.useState(false);
   const [searchAnchor, setSearchAnchor] = React.useState<SearchHit | null>(
     null,
@@ -192,6 +194,9 @@ export function AppShell() {
         onOpenSearch={() => {
           setIsSearchOpen(true);
         }}
+        onOpenProfile={() => {
+          setIsProfileOpen(true);
+        }}
         onSelectHome={() => {
           React.startTransition(() => {
             setSelectedView("home");
@@ -331,6 +336,13 @@ export function AppShell() {
           onOpenChange={setIsChannelManagementOpen}
           open={isChannelManagementOpen && activeChannel !== null}
         />
+
+        <ProfileSheet
+          currentPubkey={identityQuery.data?.pubkey}
+          fallbackDisplayName={identityQuery.data?.displayName}
+          onOpenChange={setIsProfileOpen}
+          open={isProfileOpen}
+        />
       </SidebarInset>
     </SidebarProvider>
   );

desktop/src/features/profile/hooks.ts

@@ -0,0 +1,29 @@
+import { useMutation, useQuery, useQueryClient } from "@tanstack/react-query";
+
+import { getProfile, updateProfile } from "@/shared/api/tauri";
+import type { Profile, UpdateProfileInput } from "@/shared/api/types";
+
+export const profileQueryKey = ["profile"] as const;
+
+export function useProfileQuery(enabled = true) {
+  return useQuery({
+    enabled,
+    queryKey: profileQueryKey,
+    queryFn: getProfile,
+    staleTime: 30_000,
+  });
+}
+
+export function useUpdateProfileMutation() {
+  const queryClient = useQueryClient();
+
+  return useMutation({
+    mutationFn: (input: UpdateProfileInput) => updateProfile(input),
+    onSuccess: (profile: Profile) => {
+      queryClient.setQueryData(profileQueryKey, profile);
+    },
+    onSettled: async () => {
+      await queryClient.invalidateQueries({ queryKey: profileQueryKey });
+    },
+  });
+}

desktop/src/features/profile/ui/ProfileSheet.tsx

@@ -0,0 +1,333 @@
+import { AtSign, Fingerprint, Link2, UserRound } from "lucide-react";
+import * as React from "react";
+
+import {
+  useProfileQuery,
+  useUpdateProfileMutation,
+} from "@/features/profile/hooks";
+import { Button } from "@/shared/ui/button";
+import { Input } from "@/shared/ui/input";
+import { Separator } from "@/shared/ui/separator";
+import {
+  Sheet,
+  SheetContent,
+  SheetDescription,
+  SheetHeader,
+  SheetTitle,
+} from "@/shared/ui/sheet";
+import { Textarea } from "@/shared/ui/textarea";
+
+type ProfileSheetProps = {
+  currentPubkey?: string;
+  fallbackDisplayName?: string;
+  open: boolean;
+  onOpenChange: (open: boolean) => void;
+};
+
+function Section({
+  title,
+  description,
+  children,
+}: React.PropsWithChildren<{
+  title: string;
+  description?: string;
+}>) {
+  return (
+    <section className="min-w-0 space-y-3">
+      <div className="space-y-1">
+        <h2 className="text-sm font-semibold tracking-tight">{title}</h2>
+        {description ? (
+          <p className="text-sm text-muted-foreground">{description}</p>
+        ) : null}
+      </div>
+      {children}
+    </section>
+  );
+}
+
+function ReadOnlyField({
+  label,
+  value,
+  testId,
+}: {
+  label: string;
+  value: string;
+  testId: string;
+}) {
+  return (
+    <div className="min-w-0 space-y-1.5">
+      <p className="text-sm font-medium">{label}</p>
+      <div
+        className="min-w-0 break-all whitespace-normal rounded-xl border border-border/80 bg-muted/25 px-3 py-2 text-sm text-muted-foreground"
+        data-testid={testId}
+      >
+        {value}
+      </div>
+    </div>
+  );
+}
+
+function AvatarPreview({
+  avatarUrl,
+  label,
+}: {
+  avatarUrl: string | null;
+  label: string;
+}) {
+  const [hasError, setHasError] = React.useState(false);
+
+  const initials = label
+    .trim()
+    .split(/\s+/)
+    .map((part) => part[0] ?? "")
+    .join("")
+    .slice(0, 2)
+    .toUpperCase();
+
+  if (avatarUrl && !hasError) {
+    return (
+      <img
+        alt={`${label} avatar`}
+        className="h-16 w-16 rounded-3xl border border-border/80 object-cover shadow-sm"
+        onError={() => {
+          setHasError(true);
+        }}
+        referrerPolicy="no-referrer"
+        src={avatarUrl}
+      />
+    );
+  }
+
+  return (
+    <div className="flex h-16 w-16 items-center justify-center rounded-3xl border border-border/80 bg-primary/10 text-lg font-semibold text-primary shadow-sm">
+      {initials.length > 0 ? initials : <UserRound className="h-6 w-6" />}
+    </div>
+  );
+}
+
+export function ProfileSheet({
+  currentPubkey,
+  fallbackDisplayName,
+  open,
+  onOpenChange,
+}: ProfileSheetProps) {
+  const profileQuery = useProfileQuery(open);
+  const updateProfileMutation = useUpdateProfileMutation();
+  const profile = profileQuery.data;
+
+  const currentDisplayName = profile?.displayName ?? "";
+  const currentAvatarUrl = profile?.avatarUrl ?? "";
+  const currentAbout = profile?.about ?? "";
+
+  const [displayNameDraft, setDisplayNameDraft] = React.useState("");
+  const [avatarUrlDraft, setAvatarUrlDraft] = React.useState("");
+  const [aboutDraft, setAboutDraft] = React.useState("");
+
+  React.useEffect(() => {
+    if (!open) {
+      return;
+    }
+
+    setDisplayNameDraft(currentDisplayName);
+    setAvatarUrlDraft(currentAvatarUrl);
+    setAboutDraft(currentAbout);
+  }, [currentAbout, currentAvatarUrl, currentDisplayName, open]);
+
+  const nextDisplayName = displayNameDraft.trim();
+  const nextAvatarUrl = avatarUrlDraft.trim();
+  const nextAbout = aboutDraft.trim();
+
+  const updatePayload: {
+    displayName?: string;
+    avatarUrl?: string;
+    about?: string;
+  } = {};
+
+  if (nextDisplayName.length > 0 && nextDisplayName !== currentDisplayName) {
+    updatePayload.displayName = nextDisplayName;
+  }
+  if (nextAvatarUrl.length > 0 && nextAvatarUrl !== currentAvatarUrl) {
+    updatePayload.avatarUrl = nextAvatarUrl;
+  }
+  if (nextAbout.length > 0 && nextAbout !== currentAbout) {
+    updatePayload.about = nextAbout;
+  }
+
+  const hasPendingClearRequest =
+    (currentDisplayName.length > 0 && nextDisplayName.length === 0) ||
+    (currentAvatarUrl.length > 0 && nextAvatarUrl.length === 0) ||
+    (currentAbout.length > 0 && nextAbout.length === 0);
+  const canSave =
+    Object.keys(updatePayload).length > 0 && !updateProfileMutation.isPending;
+
+  const resolvedName =
+    nextDisplayName ||
+    profile?.displayName ||
+    fallbackDisplayName ||
+    "Your profile";
+  const resolvedPubkey = profile?.pubkey ?? currentPubkey ?? "Unavailable";
+  const resolvedAvatarUrl =
+    nextAvatarUrl.length > 0 ? nextAvatarUrl : (profile?.avatarUrl ?? null);
+  const nip05Handle = profile?.nip05Handle ?? "Not set";
+
+  return (
+    <Sheet onOpenChange={onOpenChange} open={open}>
+      <SheetContent
+        className="flex w-full min-w-0 flex-col gap-0 overflow-hidden border-l border-border/80 bg-background p-0 sm:max-w-lg"
+        data-testid="profile-sheet"
+        side="right"
+      >
+        <SheetHeader className="space-y-4 border-b border-border/80 bg-muted/20 px-6 py-6 text-left">
+          <div className="flex min-w-0 items-start gap-4">
+            <AvatarPreview
+              avatarUrl={resolvedAvatarUrl}
+              key={resolvedAvatarUrl ?? "profile-fallback-avatar"}
+              label={resolvedName}
+            />
+            <div className="min-w-0 space-y-2">
+              <SheetTitle className="break-words pr-8">
+                {resolvedName}
+              </SheetTitle>
+              <SheetDescription>
+                Manage how your identity appears across Sprout.
+              </SheetDescription>
+              <div className="inline-flex items-center gap-2 rounded-full border border-border/80 bg-background/70 px-3 py-1 text-xs font-medium text-muted-foreground">
+                <Fingerprint className="h-3.5 w-3.5" />
+                <span>Your relay profile</span>
+              </div>
+            </div>
+          </div>
+        </SheetHeader>
+
+        <div className="min-w-0 flex-1 space-y-6 overflow-x-hidden overflow-y-auto px-6 py-6">
+          {profileQuery.error instanceof Error ? (
+            <p className="rounded-xl border border-destructive/30 bg-destructive/10 px-3 py-2 text-sm text-destructive">
+              {profileQuery.error.message}
+            </p>
+          ) : null}
+
+          <Section
+            description="Identity comes from your keypair. These fields are read-only here."
+            title="Identity"
+          >
+            <div className="space-y-3">
+              <ReadOnlyField
+                label="Public key"
+                testId="profile-pubkey"
+                value={resolvedPubkey}
+              />
+              <ReadOnlyField
+                label="NIP-05 handle"
+                testId="profile-nip05"
+                value={nip05Handle}
+              />
+            </div>
+          </Section>
+
+          <Separator />
+
+          <Section
+            description="These values are stored on the relay for your current identity."
+            title="Profile"
+          >
+            <form
+              className="min-w-0 space-y-4"
+              onSubmit={(event) => {
+                event.preventDefault();
+                if (!canSave) {
+                  return;
+                }
+
+                void updateProfileMutation.mutateAsync(updatePayload);
+              }}
+            >
+              <div className="space-y-1.5">
+                <label
+                  className="text-sm font-medium"
+                  htmlFor="profile-display-name"
+                >
+                  Display name
+                </label>
+                <div className="relative min-w-0">
+                  <UserRound className="pointer-events-none absolute left-3 top-1/2 h-4 w-4 -translate-y-1/2 text-muted-foreground" />
+                  <Input
+                    className="pl-9"
+                    data-testid="profile-display-name"
+                    disabled={updateProfileMutation.isPending}
+                    id="profile-display-name"
+                    onChange={(event) =>
+                      setDisplayNameDraft(event.target.value)
+                    }
+                    placeholder="How people should see you"
+                    value={displayNameDraft}
+                  />
+                </div>
+              </div>
+
+              <div className="space-y-1.5">
+                <label
+                  className="text-sm font-medium"
+                  htmlFor="profile-avatar-url"
+                >
+                  Avatar URL
+                </label>
+                <div className="relative min-w-0">
+                  <Link2 className="pointer-events-none absolute left-3 top-1/2 h-4 w-4 -translate-y-1/2 text-muted-foreground" />
+                  <Input
+                    className="pl-9"
+                    data-testid="profile-avatar-url"
+                    disabled={updateProfileMutation.isPending}
+                    id="profile-avatar-url"
+                    onChange={(event) => setAvatarUrlDraft(event.target.value)}
+                    placeholder="https://example.com/avatar.png"
+                    value={avatarUrlDraft}
+                  />
+                </div>
+              </div>
+
+              <div className="space-y-1.5">
+                <label className="text-sm font-medium" htmlFor="profile-about">
+                  About
+                </label>
+                <div className="relative min-w-0">
+                  <AtSign className="pointer-events-none absolute left-3 top-3 h-4 w-4 text-muted-foreground" />
+                  <Textarea
+                    className="min-h-28 pl-9"
+                    data-testid="profile-about"
+                    disabled={updateProfileMutation.isPending}
+                    id="profile-about"
+                    onChange={(event) => setAboutDraft(event.target.value)}
+                    placeholder="A short description for your profile"
+                    value={aboutDraft}
+                  />
+                </div>
+              </div>
+
+              <Button
+                data-testid="profile-save"
+                disabled={!canSave}
+                size="sm"
+                type="submit"
+              >
+                {updateProfileMutation.isPending ? "Saving..." : "Save profile"}
+              </Button>
+
+              {hasPendingClearRequest ? (
+                <p className="text-sm text-muted-foreground">
+                  Clearing existing profile fields is not supported yet. Blank
+                  fields are ignored for now.
+                </p>
+              ) : null}
+
+              {updateProfileMutation.error instanceof Error ? (
+                <p className="text-sm text-destructive">
+                  {updateProfileMutation.error.message}
+                </p>
+              ) : null}
+            </form>
+          </Section>
+        </div>
+      </SheetContent>
+    </Sheet>
+  );
+}

desktop/src/features/sidebar/ui/AppSidebar.tsx

@@ -1,4 +1,12 @@
-import { CircleDot, FileText, Hash, Home, Plus, Search } from "lucide-react";
+import {
+  CircleDot,
+  FileText,
+  Hash,
+  Home,
+  Plus,
+  Search,
+  UserRound,
+} from "lucide-react";
 import * as React from "react";
 
 import type { Channel } from "@/shared/api/types";
@@ -33,6 +41,7 @@ type AppSidebarProps = {
     name: string;
     description?: string;
   }) => Promise<void>;
+  onOpenProfile: () => void;
   onOpenSearch: () => void;
   onSelectHome: () => void;
   onSelectChannel: (channelId: string) => void;
@@ -227,6 +236,7 @@ export function AppSidebar({
   selectedChannelId,
   selectedView,
   onCreateChannel,
+  onOpenProfile,
   onOpenSearch,
   onSelectHome,
   onSelectChannel,
@@ -426,8 +436,26 @@ export function AppSidebar({
         ) : null}
       </SidebarContent>
 
-      <SidebarFooter className="items-end">
-        <ThemeToggle className="text-sidebar-foreground/65 hover:bg-sidebar-accent hover:text-sidebar-accent-foreground" />
+      <SidebarFooter>
+        <div className="w-full border-t border-sidebar-border/70 pt-2">
+          <div className="flex items-center justify-between gap-2 px-1">
+            <SidebarMenu className="w-auto">
+              <SidebarMenuItem>
+                <SidebarMenuButton
+                  className="size-8 rounded-lg p-0 text-sidebar-foreground/55 hover:bg-sidebar-accent/70 hover:text-sidebar-foreground"
+                  data-testid="open-profile"
+                  onClick={onOpenProfile}
+                  tooltip="Profile"
+                  type="button"
+                >
+                  <UserRound className="h-4 w-4" />
+                  <span className="sr-only">Open profile</span>
+                </SidebarMenuButton>
+              </SidebarMenuItem>
+            </SidebarMenu>
+            <ThemeToggle className="shrink-0 text-sidebar-foreground/55 hover:bg-sidebar-accent/70 hover:text-sidebar-foreground" />
+          </div>
+        </div>
       </SidebarFooter>
     </Sidebar>
   );

desktop/src/shared/api/tauri.ts

@@ -11,11 +11,13 @@ import type {
   GetHomeFeedInput,
   HomeFeedResponse,
   Identity,
+  Profile,
   RelayEvent,
   SearchMessagesInput,
   SearchMessagesResponse,
   SetChannelPurposeInput,
   SetChannelTopicInput,
+  UpdateProfileInput,
   UpdateChannelInput,
 } from "@/shared/api/types";
 
@@ -24,6 +26,14 @@ type RawIdentity = {
   display_name: string;
 };
 
+type RawProfile = {
+  pubkey: string;
+  display_name: string | null;
+  avatar_url: string | null;
+  about: string | null;
+  nip05_handle: string | null;
+};
+
 type RawChannel = {
   id: string;
   name: string;
@@ -183,6 +193,16 @@ function fromRawSearchHit(hit: RawSearchHit) {
   };
 }
 
+function fromRawProfile(profile: RawProfile): Profile {
+  return {
+    pubkey: profile.pubkey,
+    displayName: profile.display_name,
+    avatarUrl: profile.avatar_url,
+    about: profile.about,
+    nip05Handle: profile.nip05_handle,
+  };
+}
+
 export async function getIdentity(): Promise<Identity> {
   const identity = await invoke<RawIdentity>("get_identity");
 
@@ -192,6 +212,18 @@ export async function getIdentity(): Promise<Identity> {
   };
 }
 
+export async function getProfile(): Promise<Profile> {
+  const profile = await invoke<RawProfile>("get_profile");
+  return fromRawProfile(profile);
+}
+
+export async function updateProfile(
+  input: UpdateProfileInput,
+): Promise<Profile> {
+  const profile = await invoke<RawProfile>("update_profile", input);
+  return fromRawProfile(profile);
+}
+
 export function getRelayWsUrl(): Promise<string> {
   return invoke<string>("get_relay_ws_url");
 }

desktop/src/shared/api/types.ts

@@ -79,6 +79,20 @@ export type Identity = {
   displayName: string;
 };
 
+export type Profile = {
+  pubkey: string;
+  displayName: string | null;
+  avatarUrl: string | null;
+  about: string | null;
+  nip05Handle: string | null;
+};
+
+export type UpdateProfileInput = {
+  displayName?: string;
+  avatarUrl?: string;
+  about?: string;
+};
+
 export type RelayEvent = {
   id: string;
   pubkey: string;

desktop/src/testing/e2eBridge.ts

@@ -17,6 +17,14 @@ type E2eConfig = {
   identity?: TestIdentity;
 };
 
+type RawProfile = {
+  pubkey: string;
+  display_name: string | null;
+  avatar_url: string | null;
+  about: string | null;
+  nip05_handle: string | null;
+};
+
 type RawChannel = {
   id: string;
   name: string;
@@ -265,6 +273,10 @@ function getMockIdentity() {
   };
 }
 
+function cloneProfile(profile: RawProfile): RawProfile {
+  return { ...profile };
+}
+
 function listMockChannels(): RawChannel[] {
   return mockChannels.map(toRawChannel);
 }
@@ -510,6 +522,18 @@ const mockChannels: MockChannel[] = [
 const mockMessages = new Map<string, RelayEvent[]>();
 const mockSockets = new Map<number, MockSocket>();
 const realSockets = new Map<number, WebSocket>();
+const mockProfiles = new Map<string, RawProfile>([
+  [
+    MOCK_IDENTITY_PUBKEY,
+    {
+      pubkey: MOCK_IDENTITY_PUBKEY,
+      display_name: DEFAULT_MOCK_IDENTITY.display_name,
+      avatar_url: null,
+      about: null,
+      nip05_handle: null,
+    },
+  ],
+]);
 
 let installed = false;
 let nextSocketId = 1;
@@ -538,6 +562,41 @@ function getIdentity(config: E2eConfig | undefined): TestIdentity | undefined {
   return config?.identity ?? DEFAULT_REAL_IDENTITY;
 }
 
+function ensureMockProfile(config: E2eConfig | undefined): RawProfile {
+  const pubkey = getMockMemberPubkey(config);
+  const existing = mockProfiles.get(pubkey);
+  if (existing) {
+    return existing;
+  }
+
+  const profile = {
+    pubkey,
+    display_name: getMockMemberDisplayName(config),
+    avatar_url: null,
+    about: null,
+    nip05_handle: null,
+  };
+  mockProfiles.set(pubkey, profile);
+  return profile;
+}
+
+function applyMockDisplayName(pubkey: string, displayName: string | null) {
+  if (displayName) {
+    mockDisplayNames.set(pubkey, displayName);
+  } else {
+    mockDisplayNames.delete(pubkey);
+  }
+
+  for (const channel of mockChannels) {
+    for (const member of channel.members) {
+      if (member.pubkey === pubkey) {
+        member.display_name = displayName;
+      }
+    }
+    syncMockChannel(channel);
+  }
+}
+
 function resolveHandler(handler: unknown): WsHandler {
   if (typeof handler === "function") {
     return handler as WsHandler;
@@ -720,6 +779,56 @@ async function handleGetChannels(config: E2eConfig | undefined) {
   return relayJsonRequest<RawChannel[]>(config, "/api/channels");
 }
 
+async function handleGetProfile(config: E2eConfig | undefined) {
+  const identity = getIdentity(config);
+  if (!identity) {
+    return cloneProfile(ensureMockProfile(config));
+  }
+
+  return relayJsonRequest<RawProfile>(config, "/api/users/me/profile");
+}
+
+async function handleUpdateProfile(
+  args: {
+    displayName?: string;
+    avatarUrl?: string;
+    about?: string;
+  },
+  config: E2eConfig | undefined,
+) {
+  const identity = getIdentity(config);
+  if (!identity) {
+    const profile = ensureMockProfile(config);
+    const nextDisplayName = args.displayName?.trim();
+    const nextAvatarUrl = args.avatarUrl?.trim();
+    const nextAbout = args.about?.trim();
+
+    if (nextDisplayName && nextDisplayName !== profile.display_name) {
+      profile.display_name = nextDisplayName;
+      applyMockDisplayName(profile.pubkey, nextDisplayName);
+    }
+    if (nextAvatarUrl && nextAvatarUrl !== profile.avatar_url) {
+      profile.avatar_url = nextAvatarUrl;
+    }
+    if (nextAbout && nextAbout !== profile.about) {
+      profile.about = nextAbout;
+    }
+
+    return cloneProfile(profile);
+  }
+
+  await relayEmptyRequest(config, "/api/users/me/profile", {
+    method: "PUT",
+    body: JSON.stringify({
+      display_name: args.displayName,
+      avatar_url: args.avatarUrl,
+      about: args.about,
+    }),
+  });
+
+  return relayJsonRequest<RawProfile>(config, "/api/users/me/profile");
+}
+
 async function handleCreateChannel(
   args: {
     name: string;
@@ -1524,6 +1633,13 @@ export function maybeInstallE2eTauriMocks() {
         }
 
         return DEFAULT_MOCK_IDENTITY;
+      case "get_profile":
+        return handleGetProfile(activeConfig);
+      case "update_profile":
+        return handleUpdateProfile(
+          payload as Parameters<typeof handleUpdateProfile>[0],
+          activeConfig,
+        );
       case "get_relay_ws_url":
         return getRelayWsUrl(activeConfig);
       case "get_channels":

desktop/tests/e2e/profile.spec.ts

@@ -0,0 +1,44 @@
+import { expect, test } from "@playwright/test";
+
+import { installMockBridge } from "../helpers/bridge";
+
+test.beforeEach(async ({ page }) => {
+  await installMockBridge(page);
+});
+
+test("updates the relay-backed profile from the sidebar", async ({ page }) => {
+  const stamp = Date.now();
+  const displayName = `Tyler QA ${stamp}`;
+  const avatarUrl = `https://example.com/avatar-${stamp}.png`;
+  const about = `Coordinating relay profile setup ${stamp}`;
+
+  await page.goto("/");
+
+  await page.getByTestId("open-profile").click();
+  await expect(page.getByTestId("profile-sheet")).toBeVisible();
+
+  await expect(page.getByTestId("profile-pubkey")).toContainText("deadbeef");
+  await expect(page.getByTestId("profile-nip05")).toContainText("Not set");
+
+  await page.getByTestId("profile-display-name").fill(displayName);
+  await page.getByTestId("profile-avatar-url").fill(avatarUrl);
+  await page.getByTestId("profile-about").fill(about);
+  await page.getByTestId("profile-save").click();
+
+  await expect(page.getByTestId("profile-display-name")).toHaveValue(
+    displayName,
+  );
+  await expect(page.getByTestId("profile-avatar-url")).toHaveValue(avatarUrl);
+  await expect(page.getByTestId("profile-about")).toHaveValue(about);
+
+  await page.keyboard.press("Escape");
+  await expect(page.getByTestId("profile-sheet")).not.toBeVisible();
+
+  await page.getByTestId("open-profile").click();
+  await expect(page.getByTestId("profile-sheet")).toBeVisible();
+  await expect(page.getByTestId("profile-display-name")).toHaveValue(
+    displayName,
+  );
+  await expect(page.getByTestId("profile-avatar-url")).toHaveValue(avatarUrl);
+  await expect(page.getByTestId("profile-about")).toHaveValue(about);
+});