From 143408cd7f8759eeb85ff762ddb5e590a288d56c Mon Sep 17 00:00:00 2001
From: h <h@kotikot.com>
Date: Mon, 19 Oct 2026 02:46:04 +0000
Subject: [PATCH] feat(frontend): profile panel about one person with real
 changes, shared groups, joins and leaves and deleted messages

---
 frontend/src/lib/api/endpoints.ts             |  16 +-
 frontend/src/lib/api/types.ts                 |  56 ++-
 .../components/profile/AvatarHistory.svelte   |  42 +-
 .../lib/components/profile/ChangeRow.svelte   | 142 ++++++
 .../src/lib/components/profile/ChatRow.svelte | 103 ++++
 .../lib/components/profile/ProfileInfo.svelte | 473 +++++++++++-------
 .../components/profile/ProfilePanel.svelte    | 142 ++++--
 .../components/profile/ProfileSection.svelte  |  86 ++++
 frontend/src/lib/format/datetime.ts           |   5 +
 frontend/src/lib/i18n/messages.ts             |   2 +
 frontend/src/lib/i18n/messages/profile.ts     |  55 ++
 frontend/src/lib/stores/ui.svelte.ts          |  21 +
 12 files changed, 899 insertions(+), 244 deletions(-)
 create mode 100644 frontend/src/lib/components/profile/ChangeRow.svelte
 create mode 100644 frontend/src/lib/components/profile/ChatRow.svelte
 create mode 100644 frontend/src/lib/components/profile/ProfileSection.svelte
 create mode 100644 frontend/src/lib/i18n/messages/profile.ts

diff --git a/frontend/src/lib/api/endpoints.ts b/frontend/src/lib/api/endpoints.ts
index 6a684f2..12ce3e1 100644
--- a/frontend/src/lib/api/endpoints.ts
+++ b/frontend/src/lib/api/endpoints.ts
@@ -19,7 +19,8 @@ import type {
   MessageAt,
   MessageVersion,
   MessageView,
-  PeerHistoryView,
+  PeerGroups,
+  PeerOverview,
   PeerView,
   PinnedView,
   PolicyChatKind,
@@ -30,6 +31,7 @@ import type {
   PresenceSample,
   PresenceSession,
   PresenceStats,
+  ProfileChange,
   ReactionView,
   ReadInfo,
   ResponseStats,
@@ -276,8 +278,16 @@ export function getPeer(peerId: number): Promise<PeerView> {
   return request<PeerView>(`/peers/${peerId}`, { account: true });
 }
 
-export function getPeerHistory(peerId: number): Promise<PeerHistoryView[]> {
-  return request<PeerHistoryView[]>(`/peers/${peerId}/history`, {
+export function getPeerOverview(peerId: number): Promise<PeerOverview> {
+  return request<PeerOverview>(`/peers/${peerId}/overview`, { account: true });
+}
+
+export function getPeerGroups(peerId: number): Promise<PeerGroups> {
+  return request<PeerGroups>(`/peers/${peerId}/groups`, { account: true });
+}
+
+export function getChatChanges(chatId: number): Promise<ProfileChange[]> {
+  return request<ProfileChange[]>(`/chats/${chatId}/changes`, {
     account: true,
   });
 }
diff --git a/frontend/src/lib/api/types.ts b/frontend/src/lib/api/types.ts
index 7a47e4f..69aa3e1 100644
--- a/frontend/src/lib/api/types.ts
+++ b/frontend/src/lib/api/types.ts
@@ -451,14 +451,54 @@ export interface ReadInfo {
   voice: boolean;
 }
 
-export interface PeerHistoryView {
-  first_name: string | null;
-  is_deleted_account: boolean;
-  last_name: string | null;
-  observed_at: string;
-  phone: string | null;
-  photo_unique_id: string | null;
-  username: string | null;
+export type ProfileField = "name" | "username" | "phone" | "deleted" | "title";
+
+export interface ProfileChange {
+  actor_id: number | null;
+  changed_at: string;
+  field: ProfileField;
+  message_id: number | null;
+  new: string | null;
+  old: string | null;
+}
+
+export interface MembershipView {
+  actor_id: number | null;
+  actor_name: string | null;
+  chat_id: number;
+  chat_title: string | null;
+  event: "join" | "leave";
+  has_avatar: boolean;
+  message_id: number;
+  ts: string;
+}
+
+export interface DirectChatView {
+  chat_id: number;
+  last_date: string | null;
+  message_count: number;
+}
+
+export interface PeerOverview {
+  avatars: AvatarHistoryView[];
+  changes: ProfileChange[];
+  dm: DirectChatView | null;
+  memberships: MembershipView[];
+  peer: PeerView | null;
+}
+
+export interface SharedGroupView {
+  chat_id: number;
+  has_avatar: boolean;
+  last_date: string;
+  last_message_id: number;
+  message_count: number;
+  title: string | null;
+}
+
+export interface PeerGroups {
+  deleted_count: number;
+  groups: SharedGroupView[];
 }
 
 export interface StoryView {
diff --git a/frontend/src/lib/components/profile/AvatarHistory.svelte b/frontend/src/lib/components/profile/AvatarHistory.svelte
index 2372538..1b9656b 100644
--- a/frontend/src/lib/components/profile/AvatarHistory.svelte
+++ b/frontend/src/lib/components/profile/AvatarHistory.svelte
@@ -4,29 +4,32 @@
   import { getAvatarHistory } from "#lib/api/endpoints.js";
   import type { AvatarHistoryView } from "#lib/api/types.js";
   import { formatFull } from "#lib/format/datetime.js";
+  import { t } from "#lib/i18n/locale.svelte.js";
   import { accounts } from "#lib/stores/accounts.svelte.js";
 
   interface Props {
     id: number;
+    items?: AvatarHistoryView[];
     kind: AvatarKind;
     name: string;
   }
 
-  let { kind, id, name }: Props = $props();
+  let { kind, id, name, items: given }: Props = $props();
 
-  let items = $state<AvatarHistoryView[]>([]);
+  let fetched = $state<AvatarHistoryView[]>([]);
+  const items = $derived(given ?? fetched);
   const urls = $state<Record<string, string | null>>({});
 
   $effect(() => {
-    if (accounts.selectedId === null) {
+    if (given || accounts.selectedId === null) {
       return;
     }
     let active = true;
-    items = [];
+    fetched = [];
     getAvatarHistory(kind, id)
       .then((result) => {
         if (active) {
-          items = result;
+          fetched = result;
         }
       })
       .catch(() => undefined);
@@ -59,7 +62,10 @@
 
 {#if items.length > 0}
   <section>
-    <h3>История аватарок ({items.length})</h3>
+    <h3 class="section-title">
+      <span>{t("profile.avatars")}</span>
+      <span class="count">{items.length}</span>
+    </h3>
     <div class="grid">
       {#each items as item (item.unique_id)}
         <figure title={formatFull(item.first_seen_at)}>
@@ -76,24 +82,34 @@
 
 <style lang="scss">
   section {
-    display: flex;
-    flex-direction: column;
-    gap: 0.75rem;
+    padding: 0.5rem 0 1rem;
+    border-top: 1px solid var(--color-borders);
   }
 
-  h3 {
+  .section-title {
+    display: flex;
+    align-items: baseline;
+    justify-content: space-between;
+
     margin: 0;
-    font-size: 0.75rem;
+    padding: 0.5rem 1rem 0.625rem;
+
+    font-size: 0.8125rem;
     font-weight: var(--font-weight-medium);
+    color: var(--color-primary);
+  }
+
+  .count {
+    font-weight: var(--font-weight-normal);
+    font-variant-numeric: tabular-nums;
     color: var(--color-text-secondary);
-    text-transform: uppercase;
-    letter-spacing: 0.03em;
   }
 
   .grid {
     display: grid;
     grid-template-columns: repeat(auto-fill, minmax(4rem, 1fr));
     gap: 0.375rem;
+    padding: 0 1rem;
   }
 
   figure {
diff --git a/frontend/src/lib/components/profile/ChangeRow.svelte b/frontend/src/lib/components/profile/ChangeRow.svelte
new file mode 100644
index 0000000..045a4dd
--- /dev/null
+++ b/frontend/src/lib/components/profile/ChangeRow.svelte
@@ -0,0 +1,142 @@
+<script lang="ts">
+  import type { ProfileChange, ProfileField } from "#lib/api/types.js";
+  import Icon from "#lib/components/ui/Icon.svelte";
+  import { formatFull } from "#lib/format/datetime.js";
+  import { peerName } from "#lib/format/peer.js";
+  import { t } from "#lib/i18n/locale.svelte.js";
+  import type { MessageKey } from "#lib/i18n/messages.js";
+  import { peers } from "#lib/stores/peers.svelte.js";
+
+  interface Props {
+    change: ProfileChange;
+    chatId: number;
+  }
+
+  let { change, chatId }: Props = $props();
+
+  const ICONS: Record<ProfileField, string> = {
+    deleted: "delete-user",
+    name: "user",
+    phone: "phone",
+    title: "edit",
+    username: "mention",
+  };
+
+  const LABELS: Record<ProfileField, MessageKey> = {
+    deleted: "profile.accountDeleted",
+    name: "profile.fieldName",
+    phone: "profile.fieldPhone",
+    title: "profile.fieldTitle",
+    username: "profile.fieldUsername",
+  };
+
+  function shown(value: string | null): string {
+    if (value === null) {
+      return t("profile.none");
+    }
+    if (change.field === "username") {
+      return `@${value}`;
+    }
+    return change.field === "phone" ? `+${value}` : value;
+  }
+
+  const actor = $derived(
+    change.actor_id === null ? undefined : peers.get(change.actor_id)
+  );
+  const meta = $derived(
+    [
+      change.field === "deleted" ? null : t(LABELS[change.field]),
+      formatFull(change.changed_at),
+      actor ? peerName(actor) : null,
+    ]
+      .filter(Boolean)
+      .join(" · ")
+  );
+  const href = $derived(
+    change.message_id === null
+      ? undefined
+      : `/app/${chatId}?message=${change.message_id}`
+  );
+</script>
+
+<svelte:element
+  class="change"
+  {href}
+  this={href ? "a" : "div"}
+  class:link={href !== undefined}
+>
+  <Icon class="change-icon" name={ICONS[change.field]} size="1.5rem" />
+  <span class="text">
+    {#if change.field === "deleted"}
+      <span class="value">{t(LABELS.deleted)}</span>
+    {:else}
+      <span class="value">
+        <span class="old">{shown(change.old)}</span>
+        <span class="arrow">→</span>
+        {shown(change.new)}
+      </span>
+    {/if}
+    <span class="meta">{meta}</span>
+  </span>
+</svelte:element>
+
+<style lang="scss">
+  .change {
+    display: flex;
+    gap: 1.5rem;
+    align-items: center;
+
+    min-height: 3.5rem;
+    padding: 0.5rem 1rem;
+
+    color: var(--color-text);
+    text-decoration: none;
+  }
+
+  .link {
+    cursor: pointer;
+    transition: background-color 0.15s ease;
+
+    &:focus-visible {
+      outline: 2px solid var(--color-primary);
+      outline-offset: -2px;
+    }
+
+    @media (hover: hover) {
+      &:hover {
+        background-color: var(--color-chat-hover);
+      }
+    }
+  }
+
+  :global(.change .change-icon) {
+    flex-shrink: 0;
+    color: var(--color-icon-secondary);
+  }
+
+  .text {
+    display: flex;
+    flex-direction: column;
+    gap: 0.125rem;
+    min-width: 0;
+  }
+
+  .value {
+    font-size: 0.9375rem;
+    overflow-wrap: anywhere;
+  }
+
+  .old {
+    color: var(--color-text-secondary);
+  }
+
+  .arrow {
+    color: var(--color-text-secondary);
+  }
+
+  .meta {
+    font-size: 0.8125rem;
+    font-variant-numeric: tabular-nums;
+    color: var(--color-text-secondary);
+  }
+</style>
diff --git a/frontend/src/lib/components/profile/ChatRow.svelte b/frontend/src/lib/components/profile/ChatRow.svelte
new file mode 100644
index 0000000..edf431c
--- /dev/null
+++ b/frontend/src/lib/components/profile/ChatRow.svelte
@@ -0,0 +1,103 @@
+<script lang="ts">
+  import Avatar from "#lib/components/ui/Avatar.svelte";
+  import ContextMenu from "#lib/components/ui/ContextMenu.svelte";
+  import ContextMenuItem from "#lib/components/ui/ContextMenuItem.svelte";
+  import { t } from "#lib/i18n/locale.svelte.js";
+  import { goto } from "$app/navigation";
+
+  interface Props {
+    chatId: number;
+    hasAvatar: boolean;
+    href: string;
+    messageId: number;
+    subtitle: string;
+    title: string;
+  }
+
+  let { chatId, hasAvatar, href, messageId, subtitle, title }: Props = $props();
+</script>
+
+<ContextMenu>
+  {#snippet children({
+    props,
+  })}
+    <a {...props} class="chat-row" {href}>
+      <Avatar
+        avatar={{ id: chatId, kind: "chat" }}
+        colorKey={chatId}
+        {hasAvatar}
+        name={title}
+        size={2.75}
+      />
+      <span class="text">
+        <span class="title">{title}</span>
+        <span class="subtitle">{subtitle}</span>
+      </span>
+    </a>
+  {/snippet}
+  {#snippet menu()}
+    <ContextMenuItem
+      icon="open-in-new-tab"
+      onselect={() => goto(`/app/${chatId}`)}
+    >
+      {t("profile.open")}
+    </ContextMenuItem>
+    <ContextMenuItem
+      icon="show-message"
+      onselect={() => goto(`/app/${chatId}?message=${messageId}`)}
+    >
+      {t("profile.goToMessage")}
+    </ContextMenuItem>
+  {/snippet}
+</ContextMenu>
+
+<style lang="scss">
+  .chat-row {
+    display: flex;
+    gap: 1rem;
+    align-items: center;
+
+    min-height: 3.5rem;
+    padding: 0.375rem 1rem;
+
+    color: var(--color-text);
+    text-decoration: none;
+
+    transition: background-color 0.15s ease;
+
+    &:focus-visible {
+      outline: 2px solid var(--color-primary);
+      outline-offset: -2px;
+    }
+
+    @media (hover: hover) {
+      &:hover {
+        background-color: var(--color-chat-hover);
+      }
+    }
+  }
+
+  .text {
+    display: flex;
+    flex-direction: column;
+    gap: 0.125rem;
+    min-width: 0;
+  }
+
+  .title {
+    overflow: hidden;
+    font-size: 0.9375rem;
+    text-overflow: ellipsis;
+    white-space: nowrap;
+  }
+
+  .subtitle {
+    overflow: hidden;
+
+    font-size: 0.8125rem;
+    font-variant-numeric: tabular-nums;
+    color: var(--color-text-secondary);
+    text-overflow: ellipsis;
+    white-space: nowrap;
+  }
+</style>
diff --git a/frontend/src/lib/components/profile/ProfileInfo.svelte b/frontend/src/lib/components/profile/ProfileInfo.svelte
index cb25eb1..44b2e74 100644
--- a/frontend/src/lib/components/profile/ProfileInfo.svelte
+++ b/frontend/src/lib/components/profile/ProfileInfo.svelte
@@ -1,93 +1,101 @@
 <script lang="ts">
-  import type { AvatarKind } from "#lib/api/avatars.js";
-  import { getPeerHistory, getStories } from "#lib/api/endpoints.js";
-  import type { PeerHistoryView, PeerView } from "#lib/api/types.js";
+  import { ripple } from "#lib/actions/ripple.js";
+  import {
+    getChatChanges,
+    getPeerGroups,
+    getStories,
+  } from "#lib/api/endpoints.js";
+  import type {
+    MembershipView,
+    PeerGroups,
+    PeerOverview,
+    ProfileChange,
+    SharedGroupView,
+  } from "#lib/api/types.js";
   import AvatarHistory from "#lib/components/profile/AvatarHistory.svelte";
+  import ChangeRow from "#lib/components/profile/ChangeRow.svelte";
+  import ChatRow from "#lib/components/profile/ChatRow.svelte";
+  import ProfileSection from "#lib/components/profile/ProfileSection.svelte";
   import Icon from "#lib/components/ui/Icon.svelte";
-  import { formatFull } from "#lib/format/datetime.js";
+  import { formatDate, formatFull } from "#lib/format/datetime.js";
+  import { t } from "#lib/i18n/locale.svelte.js";
   import { accounts } from "#lib/stores/accounts.svelte.js";
+  import { peers } from "#lib/stores/peers.svelte.js";
   import { ui } from "#lib/stores/ui.svelte.js";
+  import { goto } from "$app/navigation";
 
   interface Props {
-    avatarKind: AvatarKind;
     chatId: number;
-    isDm: boolean;
+    id: number;
     name: string;
-    peer: PeerView | null;
+    onstories: () => void;
+    overview: PeerOverview | null;
   }
 
-  let { chatId, isDm, peer, name, avatarKind }: Props = $props();
+  let { chatId, id, name, onstories, overview }: Props = $props();
 
   interface InfoRow {
+    icon: string;
     label: string;
     value: string;
   }
 
+  const isPerson = $derived(id > 0);
+  const peer = $derived(overview?.peer ?? null);
+  const dm = $derived(overview?.dm ?? null);
+
+  let groups = $state<PeerGroups | null>(null);
+  let titleChanges = $state<ProfileChange[]>([]);
+  let storyCount = $state(0);
+
+  const changes = $derived(isPerson ? (overview?.changes ?? []) : titleChanges);
+
   const rows = $derived.by(() => {
     const result: InfoRow[] = [];
-    if (peer?.username) {
-      result.push({ label: "Имя пользователя", value: `@${peer.username}` });
-    }
     if (peer?.phone) {
-      result.push({ label: "Телефон", value: `+${peer.phone}` });
+      result.push({
+        icon: "phone",
+        label: t("profile.phone"),
+        value: `+${peer.phone}`,
+      });
     }
-    result.push({ label: "ID", value: String(chatId) });
+    if (peer?.username) {
+      result.push({
+        icon: "mention",
+        label: t("profile.username"),
+        value: `@${peer.username}`,
+      });
+    }
+    result.push({ icon: "info", label: "ID", value: String(id) });
     if (peer?.is_deleted_account) {
-      result.push({ label: "Статус", value: "Удалённый аккаунт" });
+      result.push({
+        icon: "delete-user",
+        label: t("profile.status"),
+        value: t("profile.deletedAccount"),
+      });
     }
     if (peer?.updated_at) {
-      result.push({ label: "Обновлено", value: formatFull(peer.updated_at) });
+      result.push({
+        icon: "recent",
+        label: t("profile.updated"),
+        value: formatFull(peer.updated_at),
+      });
     }
     return result;
   });
 
-  let history = $state<PeerHistoryView[]>([]);
-
-  function fingerprint(entry: PeerHistoryView): string {
-    return [
-      entry.first_name,
-      entry.last_name,
-      entry.username,
-      entry.phone,
-      entry.is_deleted_account,
-    ].join("|");
-  }
-
-  const changes = $derived.by(() => {
-    const result: PeerHistoryView[] = [];
-    let last: string | null = null;
-    for (const entry of history) {
-      const print = fingerprint(entry);
-      if (print !== last) {
-        result.push(entry);
-        last = print;
-      }
-    }
-    return result;
-  });
-
-  function entryName(entry: PeerHistoryView): string {
-    const parts = [entry.first_name, entry.last_name].filter(Boolean);
-    if (parts.length > 0) {
-      return parts.join(" ");
-    }
-    if (entry.username) {
-      return `@${entry.username}`;
-    }
-    return "—";
-  }
-
   $effect(() => {
-    if (accounts.selectedId === null || !isDm) {
-      history = [];
+    if (accounts.selectedId === null || !isPerson) {
+      groups = null;
       return;
     }
+    const peerId = id;
     let active = true;
-    history = [];
-    getPeerHistory(chatId)
+    groups = null;
+    getPeerGroups(peerId)
       .then((result) => {
         if (active) {
-          history = result;
+          groups = result;
         }
       })
       .catch(() => undefined);
@@ -96,17 +104,44 @@
     };
   });
 
-  let storyCount = $state(0);
+  $effect(() => {
+    if (accounts.selectedId === null || isPerson) {
+      titleChanges = [];
+      return;
+    }
+    const groupId = id;
+    let active = true;
+    titleChanges = [];
+    getChatChanges(groupId)
+      .then((result) => {
+        if (active) {
+          titleChanges = result;
+        }
+      })
+      .catch(() => undefined);
+    return () => {
+      active = false;
+    };
+  });
+
+  $effect(() => {
+    const actors = titleChanges
+      .map((change) => change.actor_id)
+      .filter((actor) => actor !== null);
+    if (actors.length > 0) {
+      peers.ensure(actors);
+    }
+  });
 
   $effect(() => {
     if (accounts.selectedId === null) {
       storyCount = 0;
       return;
     }
-    const id = chatId;
+    const storyOwner = id;
     let active = true;
     storyCount = 0;
-    getStories(id, { limit: 100 })
+    getStories(storyOwner, { limit: 100 })
       .then((result) => {
         if (active) {
           storyCount = result.length;
@@ -117,51 +152,164 @@
       active = false;
     };
   });
+
+  function membershipAction(item: MembershipView): string {
+    const join = item.event === "join";
+    if (item.actor_id === null || item.actor_id === id) {
+      return join ? t("profile.joined") : t("profile.left");
+    }
+    if (item.actor_id === accounts.selected?.tg_user_id) {
+      return join ? t("profile.addedByYou") : t("profile.removedByYou");
+    }
+    const actor = item.actor_name ?? String(item.actor_id);
+    return join
+      ? t("profile.addedBy", { name: actor })
+      : t("profile.removedBy", { name: actor });
+  }
+
+  function membershipLine(item: MembershipView): string {
+    return `${membershipAction(item)} · ${formatDate(item.ts)}`;
+  }
+
+  function groupLine(group: SharedGroupView): string {
+    const count = t("profile.messages", { count: group.message_count });
+    return `${count} · ${formatDate(group.last_date)}`;
+  }
+
+  async function openAnalytics() {
+    if (id !== chatId) {
+      await goto(`/app/${id}`);
+    }
+    ui.openPanel("presence");
+  }
 </script>
 
+{#snippet action(
+  icon: string,
+  label: string,
+  onclick: () => void,
+  value = ""
+)}
+  <button class="row action" {onclick} type="button" use:ripple>
+    <Icon class="row-icon" name={icon} size="1.5rem" />
+    <span class="label">{label}</span>
+    {#if value}
+      <span class="end">{value}</span>
+    {/if}
+    <Icon class="row-chevron" name="next" size="1rem" />
+  </button>
+{/snippet}
+
 <div class="info-tab">
-  {#if rows.length > 0}
-    <section>
-      <dl>
-        {#each rows as row (row.label)}
-          <div class="row">
-            <dt>{row.label}</dt>
-            <dd>{row.value}</dd>
-          </div>
-        {/each}
-      </dl>
+  <section class="rows">
+    {#each rows as row (row.label)}
+      <div class="row">
+        <Icon class="row-icon" name={row.icon} size="1.5rem" />
+        <span class="text">
+          <span class="value">{row.value}</span>
+          <span class="caption">{row.label}</span>
+        </span>
+      </div>
+    {/each}
+    {#if isPerson}
+      <div class="row">
+        <Icon class="row-icon" name="delete" size="1.5rem" />
+        <span class="label">{t("profile.deletedMessages")}</span>
+        <span class="end">{groups?.deleted_count ?? ""}</span>
+      </div>
+    {/if}
+  </section>
+
+  {#if (isPerson && overview) || storyCount > 0}
+    <section class="rows">
+      {#if isPerson && dm && id !== chatId}
+        {@render action(
+          "message",
+          t("profile.openChat"),
+          () => goto(`/app/${id}`),
+          t("profile.messages", { count: dm.message_count })
+        )}
+      {:else if isPerson && !dm}
+        <div class="row">
+          <Icon class="row-icon" name="message" size="1.5rem" />
+          <span class="label muted">{t("profile.noChat")}</span>
+        </div>
+      {/if}
+      {#if isPerson && dm}
+        {@render action("stats", t("profile.analytics"), openAnalytics)}
+      {/if}
+      {#if storyCount > 0}
+        {@render action(
+          "play-story",
+          t("profile.stories"),
+          onstories,
+          String(storyCount)
+        )}
+      {/if}
     </section>
   {/if}
 
-  {#if storyCount > 0}
-    <section>
-      <button
-        class="entry"
-        onclick={() => ui.openPanel("stories")}
-        type="button"
-      >
-        <span class="entry-icon"><Icon name="play-story" /></span>
-        <span class="entry-label">Сторис</span>
-        <span class="entry-count">{storyCount}</span>
-        <Icon name="next" size="1rem" />
-      </button>
-    </section>
+  <ProfileSection
+    items={changes}
+    key={(change) => `${change.field}:${change.changed_at}`}
+    title={isPerson ? t("profile.changes") : t("profile.titleChanges")}
+  >
+    {#snippet row(
+      change
+    )}
+      <ChangeRow {change} chatId={id} />
+    {/snippet}
+  </ProfileSection>
+
+  {#if !isPerson || overview}
+    <AvatarHistory
+      {id}
+      items={overview?.avatars}
+      kind={isPerson ? "peer" : "chat"}
+      {name}
+    />
   {/if}
 
-  <AvatarHistory id={chatId} kind={avatarKind} {name} />
+  {#if groups}
+    <ProfileSection
+      items={groups.groups}
+      key={(group) => group.chat_id}
+      title={t("profile.groups")}
+    >
+      {#snippet row(
+        group
+      )}
+        <ChatRow
+          chatId={group.chat_id}
+          hasAvatar={group.has_avatar}
+          href="/app/{group.chat_id}"
+          messageId={group.last_message_id}
+          subtitle={groupLine(group)}
+          title={group.title ?? t("profile.chat", { id: group.chat_id })}
+        />
+      {/snippet}
+    </ProfileSection>
+  {/if}
 
-  {#if changes.length > 1}
-    <section>
-      <h3>История профиля</h3>
-      <ul class="changes">
-        {#each changes as entry (entry.observed_at)}
-          <li>
-            <span class="label">{entryName(entry)}</span>
-            <span class="time">{formatFull(entry.observed_at)}</span>
-          </li>
-        {/each}
-      </ul>
-    </section>
+  {#if overview}
+    <ProfileSection
+      items={overview.memberships}
+      key={(item) => `${item.chat_id}:${item.message_id}`}
+      title={t("profile.memberships")}
+    >
+      {#snippet row(
+        item
+      )}
+        <ChatRow
+          chatId={item.chat_id}
+          hasAvatar={item.has_avatar}
+          href="/app/{item.chat_id}?message={item.message_id}"
+          messageId={item.message_id}
+          subtitle={membershipLine(item)}
+          title={item.chat_title ?? t("profile.chat", { id: item.chat_id })}
+        />
+      {/snippet}
+    </ProfileSection>
   {/if}
 </div>
 
@@ -169,119 +317,94 @@
   .info-tab {
     display: flex;
     flex-direction: column;
-    gap: 1.5rem;
-    padding: 1rem;
+    padding-bottom: 1rem;
   }
 
-  section {
-    display: flex;
-    flex-direction: column;
-    gap: 0.75rem;
-  }
+  .rows {
+    padding: 0.5rem 0;
 
-  h3 {
-    margin: 0;
-    font-size: 0.75rem;
-    font-weight: var(--font-weight-medium);
-    color: var(--color-text-secondary);
-    text-transform: uppercase;
-    letter-spacing: 0.03em;
-  }
-
-  dl {
-    display: flex;
-    flex-direction: column;
-    gap: 1rem;
-    margin: 0;
+    & + .rows {
+      border-top: 1px solid var(--color-borders);
+    }
   }
 
   .row {
     display: flex;
-    flex-direction: column;
-    gap: 0.125rem;
-  }
-
-  dt {
-    font-size: 0.75rem;
-    color: var(--color-text-secondary);
-  }
-
-  dd {
-    margin: 0;
-    font-size: 0.9375rem;
-    color: var(--color-text);
-    overflow-wrap: anywhere;
-  }
-
-  .entry {
-    display: flex;
+    gap: 1.5rem;
     align-items: center;
-    gap: 0.75rem;
 
     width: 100%;
-    padding: 0.625rem 0.5rem;
-    border: 0;
-    border-radius: 0.5rem;
+    min-height: 3.5rem;
+    padding: 0.5rem 1rem;
 
-    cursor: pointer;
     color: var(--color-text);
-    background: transparent;
+  }
 
-    &:hover {
-      background-color: var(--color-background-secondary);
+  .action {
+    cursor: pointer;
+    position: relative;
+    overflow: hidden;
+
+    border: 0;
+
+    font: inherit;
+    text-align: start;
+
+    background-color: transparent;
+    transition: background-color 0.15s ease;
+
+    &:focus-visible {
+      outline: 2px solid var(--color-primary);
+      outline-offset: -2px;
+    }
+
+    @media (hover: hover) {
+      &:hover {
+        background-color: var(--color-chat-hover);
+      }
     }
   }
 
-  .entry-icon {
-    display: flex;
+  :global(.info-tab .row-icon),
+  :global(.info-tab .row-chevron) {
     flex-shrink: 0;
-    align-items: center;
-    justify-content: center;
-
-    width: 2.25rem;
-    height: 2.25rem;
-    border-radius: 50%;
-
-    color: var(--color-white);
-    background-color: var(--color-primary);
+    color: var(--color-icon-secondary);
   }
 
-  .entry-label {
-    flex: 1;
-    font-size: 0.9375rem;
-    text-align: left;
-  }
-
-  .entry-count {
-    font-size: 0.875rem;
-    color: var(--color-text-secondary);
-  }
-
-  .changes {
+  .text {
     display: flex;
     flex-direction: column;
-    gap: 0.5rem;
-    margin: 0;
-    padding: 0;
-    list-style: none;
+    gap: 0.125rem;
+    min-width: 0;
   }
 
-  .changes li {
-    display: flex;
-    align-items: center;
-    justify-content: space-between;
-    gap: 0.5rem;
+  .value {
+    font-size: 0.9375rem;
+    overflow-wrap: anywhere;
+  }
+
+  .caption {
     font-size: 0.8125rem;
+    color: var(--color-text-secondary);
   }
 
   .label {
     overflow: hidden;
+    flex: 1;
+
+    font-size: 0.9375rem;
     text-overflow: ellipsis;
     white-space: nowrap;
   }
 
-  .time {
+  .muted {
+    color: var(--color-text-secondary);
+  }
+
+  .end {
     flex-shrink: 0;
+    font-size: 0.9375rem;
+    font-variant-numeric: tabular-nums;
     color: var(--color-text-secondary);
   }
 </style>
diff --git a/frontend/src/lib/components/profile/ProfilePanel.svelte b/frontend/src/lib/components/profile/ProfilePanel.svelte
index a717546..f695113 100644
--- a/frontend/src/lib/components/profile/ProfilePanel.svelte
+++ b/frontend/src/lib/components/profile/ProfilePanel.svelte
@@ -1,6 +1,6 @@
 <script lang="ts">
-  import { getPeer } from "#lib/api/endpoints.js";
-  import type { PeerView } from "#lib/api/types.js";
+  import { getPeerOverview } from "#lib/api/endpoints.js";
+  import type { PeerOverview } from "#lib/api/types.js";
   import ChatCalendar from "#lib/components/profile/ChatCalendar.svelte";
   import ProfileInfo from "#lib/components/profile/ProfileInfo.svelte";
   import SharedLinks from "#lib/components/profile/SharedLinks.svelte";
@@ -10,18 +10,23 @@
   import EmptyState from "#lib/components/ui/EmptyState.svelte";
   import Icon from "#lib/components/ui/Icon.svelte";
   import { peerName } from "#lib/format/peer.js";
+  import { t } from "#lib/i18n/locale.svelte.js";
+  import type { MessageKey } from "#lib/i18n/messages.js";
+  import { accounts } from "#lib/stores/accounts.svelte.js";
   import { chats } from "#lib/stores/chats.svelte.js";
+  import { peers } from "#lib/stores/peers.svelte.js";
+  import { ui } from "#lib/stores/ui.svelte.js";
   import { page } from "$app/state";
 
   type Tab = "info" | "media" | "files" | "links" | "stories" | "calendar";
 
-  const TABS: { id: Tab; icon: string; label: string }[] = [
-    { icon: "info", id: "info", label: "Инфо" },
-    { icon: "photo", id: "media", label: "Медиа" },
-    { icon: "document", id: "files", label: "Файлы" },
-    { icon: "link", id: "links", label: "Ссылки" },
-    { icon: "play-story", id: "stories", label: "Сторис" },
-    { icon: "calendar", id: "calendar", label: "Календарь" },
+  const TABS: { id: Tab; icon: string; label: MessageKey }[] = [
+    { icon: "info", id: "info", label: "profile.tabInfo" },
+    { icon: "photo", id: "media", label: "profile.tabMedia" },
+    { icon: "document", id: "files", label: "profile.tabFiles" },
+    { icon: "link", id: "links", label: "profile.tabLinks" },
+    { icon: "play-story", id: "stories", label: "profile.stories" },
+    { icon: "calendar", id: "calendar", label: "profile.tabCalendar" },
   ];
 
   const MEDIA_KINDS = ["photo", "video", "animation", "video_note"];
@@ -30,41 +35,65 @@
   const chatId = $derived(
     page.params.chatId ? Number(page.params.chatId) : null
   );
-  const isDm = $derived(chatId !== null && chatId > 0);
-  const chat = $derived(chatId === null ? null : chats.byId(chatId));
-  const avatarKind = $derived(isDm ? "peer" : "chat");
-
-  let peer = $state<PeerView | null>(null);
-  let tab = $state<Tab>("info");
-
-  const title = $derived(
-    isDm && peer
-      ? peerName(peer)
-      : (chat?.title ?? (chatId === null ? "" : `Chat ${chatId}`))
+  const targetId = $derived(
+    chatId === null ? null : (ui.personIn(chatId) ?? chatId)
   );
+  const isPerson = $derived(targetId !== null && targetId > 0);
+  const chat = $derived(targetId === null ? undefined : chats.byId(targetId));
+
+  let overview = $state<PeerOverview | null>(null);
+  let picked = $state<{ target: number | null; tab: Tab }>({
+    tab: "info",
+    target: null,
+  });
+
+  const peer = $derived(
+    overview?.peer ?? (targetId === null ? undefined : peers.get(targetId))
+  );
+  const hasChat = $derived(targetId === chatId || Boolean(overview?.dm));
+  const tabs = $derived(
+    TABS.filter(
+      (item) => hasChat || item.id === "info" || item.id === "stories"
+    )
+  );
+  const tab = $derived(
+    picked.target === targetId && tabs.some((item) => item.id === picked.tab)
+      ? picked.tab
+      : "info"
+  );
+
+  const title = $derived.by(() => {
+    if (isPerson && peer) {
+      return peerName(peer);
+    }
+    return chat?.title ?? t("profile.chat", { id: targetId ?? "" });
+  });
   const subtitle = $derived.by(() => {
-    if (isDm) {
+    if (isPerson) {
       if (peer?.username) {
         return `@${peer.username}`;
       }
-      return peer?.phone ? `+${peer.phone}` : `ID ${chatId}`;
+      return peer?.phone ? `+${peer.phone}` : `ID ${targetId}`;
     }
     const count = chat?.message_count ?? 0;
-    return count > 0 ? `${count} сообщений` : "группа";
+    return count > 0 ? t("profile.messages", { count }) : t("profile.group");
   });
-  const hasAvatar = $derived(chat?.has_avatar ?? Boolean(peer?.has_avatar));
+  const hasAvatar = $derived(
+    isPerson ? Boolean(peer?.has_avatar) : (chat?.has_avatar ?? false)
+  );
 
   $effect(() => {
-    if (chatId === null || !isDm) {
-      peer = null;
+    if (accounts.selectedId === null || targetId === null || !isPerson) {
+      overview = null;
       return;
     }
+    const peerId = targetId;
     let active = true;
-    peer = null;
-    getPeer(chatId)
+    overview = null;
+    getPeerOverview(peerId)
       .then((result) => {
         if (active) {
-          peer = result;
+          overview = result;
         }
       })
       .catch(() => undefined);
@@ -74,14 +103,14 @@
   });
 </script>
 
-{#if chatId === null}
-  <EmptyState description="Откройте чат" title="Профиль" />
+{#if chatId === null || targetId === null}
+  <EmptyState description={t("profile.empty")} title={t("profile.title")} />
 {:else}
   <div class="profile">
     <header class="hero">
       <Avatar
-        avatar={{ id: chatId, kind: avatarKind }}
-        colorKey={chatId}
+        avatar={{ id: targetId, kind: isPerson ? "peer" : "chat" }}
+        colorKey={targetId}
         deleted={peer?.is_deleted_account ?? false}
         {hasAvatar}
         name={title}
@@ -92,13 +121,15 @@
     </header>
 
     <nav class="tabs">
-      {#each TABS as item (item.id)}
+      {#each tabs as item (item.id)}
         <button
-          aria-label={item.label}
+          aria-label={t(item.label)}
+          aria-pressed={tab === item.id}
           class="tab"
           onclick={() => {
-            tab = item.id;
+            picked = { tab: item.id, target: targetId };
           }}
+          title={t(item.label)}
           type="button"
           class:active={tab === item.id}
         >
@@ -109,17 +140,25 @@
 
     <div class="tab-body">
       {#if tab === "info"}
-        <ProfileInfo {avatarKind} {chatId} {isDm} name={title} {peer} />
+        <ProfileInfo
+          {chatId}
+          id={targetId}
+          name={title}
+          onstories={() => {
+            picked = { tab: "stories", target: targetId };
+          }}
+          {overview}
+        />
       {:else if tab === "media"}
-        <SharedMedia {chatId} kinds={MEDIA_KINDS} layout="grid" />
+        <SharedMedia chatId={targetId} kinds={MEDIA_KINDS} layout="grid" />
       {:else if tab === "files"}
-        <SharedMedia {chatId} kinds={FILE_KINDS} layout="list" />
+        <SharedMedia chatId={targetId} kinds={FILE_KINDS} layout="list" />
       {:else if tab === "links"}
-        <SharedLinks {chatId} />
+        <SharedLinks chatId={targetId} />
       {:else if tab === "stories"}
-        <StoriesArchive {chatId} />
+        <StoriesArchive chatId={targetId} />
       {:else if tab === "calendar"}
-        <ChatCalendar {chatId} />
+        <ChatCalendar chatId={targetId} />
       {/if}
     </div>
   </div>
@@ -129,7 +168,7 @@
   .profile {
     display: flex;
     flex-direction: column;
-    height: 100%;
+    min-height: 100%;
   }
 
   .hero {
@@ -155,12 +194,21 @@
   }
 
   .tabs {
+    position: sticky;
+    top: 0;
+    z-index: 1;
+
     display: flex;
     flex-shrink: 0;
+
     border-bottom: 1px solid var(--color-borders);
+
+    background-color: var(--color-background);
   }
 
   .tab {
+    cursor: pointer;
+
     display: flex;
     flex: 1;
     align-items: center;
@@ -171,17 +219,21 @@
     border-bottom: 2px solid transparent;
 
     color: var(--color-text-secondary);
-    cursor: pointer;
+
     background: transparent;
 
     &.active {
       color: var(--color-primary);
       border-bottom-color: var(--color-primary);
     }
+
+    &:focus-visible {
+      outline: 2px solid var(--color-primary);
+      outline-offset: -2px;
+    }
   }
 
   .tab-body {
-    overflow-y: auto;
     flex: 1;
   }
 </style>
diff --git a/frontend/src/lib/components/profile/ProfileSection.svelte b/frontend/src/lib/components/profile/ProfileSection.svelte
new file mode 100644
index 0000000..64d9837
--- /dev/null
+++ b/frontend/src/lib/components/profile/ProfileSection.svelte
@@ -0,0 +1,86 @@
+<script generics="T" lang="ts">
+  import type { Snippet } from "svelte";
+  import { t } from "#lib/i18n/locale.svelte.js";
+
+  interface Props {
+    items: T[];
+    key: (item: T) => string | number;
+    row: Snippet<[T]>;
+    title: string;
+  }
+
+  let { items, key, row, title }: Props = $props();
+
+  const STEP = 8;
+
+  let shown = $state(STEP);
+</script>
+
+{#if items.length > 0}
+  <section class="profile-section">
+    <h3 class="section-title">
+      <span>{title}</span>
+      <span class="count">{items.length}</span>
+    </h3>
+    {#each items.slice(0, shown) as item (key(item))}
+      {@render row(item)}
+    {/each}
+    {#if items.length > shown}
+      <button
+        class="more"
+        onclick={() => {
+          shown += STEP * 4;
+        }}
+        type="button"
+      >
+        {t("profile.showMore")}
+      </button>
+    {/if}
+  </section>
+{/if}
+
+<style lang="scss">
+  .profile-section {
+    padding: 0.5rem 0;
+    border-top: 1px solid var(--color-borders);
+  }
+
+  .section-title {
+    display: flex;
+    align-items: baseline;
+    justify-content: space-between;
+
+    margin: 0;
+    padding: 0.5rem 1rem 0.375rem;
+
+    font-size: 0.8125rem;
+    font-weight: var(--font-weight-medium);
+    color: var(--color-primary);
+  }
+
+  .count {
+    font-weight: var(--font-weight-normal);
+    font-variant-numeric: tabular-nums;
+    color: var(--color-text-secondary);
+  }
+
+  .more {
+    cursor: pointer;
+
+    width: calc(100% - 2rem);
+    margin: 0.5rem 1rem 0;
+    padding: 0.5rem;
+    border: 0;
+    border-radius: 0.5rem;
+
+    font: inherit;
+    font-size: 0.875rem;
+    color: var(--color-primary);
+
+    background-color: var(--color-background-secondary);
+
+    &:focus-visible {
+      outline: 2px solid var(--color-primary);
+    }
+  }
+</style>
diff --git a/frontend/src/lib/format/datetime.ts b/frontend/src/lib/format/datetime.ts
index ba5cb9f..f3dabde 100644
--- a/frontend/src/lib/format/datetime.ts
+++ b/frontend/src/lib/format/datetime.ts
@@ -1,6 +1,7 @@
 import { locale } from "#lib/i18n/locale.svelte.js";
 
 const OPTIONS = {
+  date: { day: "numeric", month: "short", year: "numeric" },
   day: { day: "numeric", month: "short" },
   full: {
     day: "numeric",
@@ -38,6 +39,10 @@ export function formatDay(iso: string): string {
   return format("day", new Date(iso));
 }
 
+export function formatDate(iso: string): string {
+  return format("date", new Date(iso));
+}
+
 export function formatFull(iso: string): string {
   return format("full", new Date(iso));
 }
diff --git a/frontend/src/lib/i18n/messages.ts b/frontend/src/lib/i18n/messages.ts
index 2939b7a..4c66e91 100644
--- a/frontend/src/lib/i18n/messages.ts
+++ b/frontend/src/lib/i18n/messages.ts
@@ -2,6 +2,7 @@ import { account } from "#lib/i18n/messages/account.js";
 import { alerts } from "#lib/i18n/messages/alerts.js";
 import { common } from "#lib/i18n/messages/common.js";
 import { menu } from "#lib/i18n/messages/menu.js";
+import { profile } from "#lib/i18n/messages/profile.js";
 import { read } from "#lib/i18n/messages/read.js";
 import { settings } from "#lib/i18n/messages/settings.js";
 import { watches } from "#lib/i18n/messages/watches.js";
@@ -11,6 +12,7 @@ export const messages = {
   ...alerts,
   ...common,
   ...menu,
+  ...profile,
   ...read,
   ...settings,
   ...watches,
diff --git a/frontend/src/lib/i18n/messages/profile.ts b/frontend/src/lib/i18n/messages/profile.ts
new file mode 100644
index 0000000..fcdd39a
--- /dev/null
+++ b/frontend/src/lib/i18n/messages/profile.ts
@@ -0,0 +1,55 @@
+import type { Messages } from "#lib/i18n/types.js";
+
+export const profile = {
+  "profile.accountDeleted": { en: "Account deleted", ru: "Аккаунт удалён" },
+  "profile.addedBy": { en: "Added by {name}", ru: "{name} добавил(а)" },
+  "profile.addedByYou": { en: "Added by you", ru: "Вы добавили" },
+  "profile.analytics": { en: "Analytics", ru: "Аналитика" },
+  "profile.avatars": { en: "Profile photos", ru: "Фотографии профиля" },
+  "profile.changes": { en: "Profile changes", ru: "Изменения профиля" },
+  "profile.chat": { en: "Chat {id}", ru: "Чат {id}" },
+  "profile.deletedAccount": { en: "Deleted account", ru: "Удалённый аккаунт" },
+  "profile.deletedMessages": {
+    en: "Deleted messages",
+    ru: "Удалено сообщений",
+  },
+  "profile.empty": { en: "Open a chat", ru: "Откройте чат" },
+  "profile.fieldName": { en: "Name", ru: "Имя" },
+  "profile.fieldPhone": { en: "Phone", ru: "Телефон" },
+  "profile.fieldTitle": { en: "Title", ru: "Название" },
+  "profile.fieldUsername": { en: "Username", ru: "Имя пользователя" },
+  "profile.goToMessage": { en: "Go to message", ru: "Перейти к сообщению" },
+  "profile.group": { en: "group", ru: "группа" },
+  "profile.groups": { en: "Groups in common", ru: "Общие группы" },
+  "profile.joined": { en: "Joined", ru: "Вступил(а) в группу" },
+  "profile.left": { en: "Left", ru: "Вышел(а) из группы" },
+  "profile.memberships": { en: "Joins and leaves", ru: "Вступления и выходы" },
+  "profile.messages": {
+    en: { one: "{count} message", other: "{count} messages" },
+    ru: {
+      few: "{count} сообщения",
+      many: "{count} сообщений",
+      one: "{count} сообщение",
+      other: "{count} сообщения",
+    },
+  },
+  "profile.noChat": { en: "No private chat", ru: "Личной переписки нет" },
+  "profile.none": { en: "none", ru: "нет" },
+  "profile.open": { en: "Open", ru: "Открыть" },
+  "profile.openChat": { en: "Open chat", ru: "Открыть чат" },
+  "profile.phone": { en: "Phone", ru: "Телефон" },
+  "profile.removedBy": { en: "Removed by {name}", ru: "{name} удалил(а)" },
+  "profile.removedByYou": { en: "Removed by you", ru: "Вы удалили" },
+  "profile.showMore": { en: "Show more", ru: "Показать ещё" },
+  "profile.status": { en: "Status", ru: "Статус" },
+  "profile.stories": { en: "Stories", ru: "Сторис" },
+  "profile.tabCalendar": { en: "Calendar", ru: "Календарь" },
+  "profile.tabFiles": { en: "Files", ru: "Файлы" },
+  "profile.tabInfo": { en: "Info", ru: "Инфо" },
+  "profile.tabLinks": { en: "Links", ru: "Ссылки" },
+  "profile.tabMedia": { en: "Media", ru: "Медиа" },
+  "profile.title": { en: "Profile", ru: "Профиль" },
+  "profile.titleChanges": { en: "Title changes", ru: "Изменения названия" },
+  "profile.updated": { en: "Updated", ru: "Обновлено" },
+  "profile.username": { en: "Username", ru: "Имя пользователя" },
+} satisfies Messages;
diff --git a/frontend/src/lib/stores/ui.svelte.ts b/frontend/src/lib/stores/ui.svelte.ts
index c0ec9fe..99c7074 100644
--- a/frontend/src/lib/stores/ui.svelte.ts
+++ b/frontend/src/lib/stores/ui.svelte.ts
@@ -28,12 +28,18 @@ interface JumpTarget {
   messageId: number;
 }
 
+interface PersonTarget {
+  chatId: number;
+  peerId: number;
+}
+
 function createUi() {
   let rightPanel = $state<RightPanel | null>(null);
   let panelMessageId = $state<number | null>(null);
   let leftColumnOpen = $state(true);
   let leftView = $state<LeftView>("main");
   let jumpTarget = $state<JumpTarget | null>(null);
+  let person = $state<PersonTarget | null>(null);
 
   return {
     clearJump() {
@@ -42,6 +48,7 @@ function createUi() {
     closePanel() {
       rightPanel = null;
       panelMessageId = null;
+      person = null;
     },
     closeSettings() {
       leftView = "main";
@@ -62,6 +69,12 @@ function createUi() {
     openPanel(panel: RightPanel) {
       rightPanel = panel;
       panelMessageId = null;
+      person = null;
+    },
+    openPerson(chatId: number, peerId: number) {
+      rightPanel = "profile";
+      panelMessageId = null;
+      person = { chatId, peerId };
     },
     openSettings() {
       leftView = "settings";
@@ -69,12 +82,20 @@ function createUi() {
     get panelMessageId() {
       return panelMessageId;
     },
+    personIn(chatId: number | null): number | null {
+      return person !== null && person.chatId === chatId ? person.peerId : null;
+    },
     requestJump(chatId: number, messageId: number) {
       jumpTarget = { chatId, messageId };
     },
     get rightPanel() {
       return rightPanel;
     },
+    setChat(chatId: number | null) {
+      if (person !== null && person.chatId !== chatId) {
+        person = null;
+      }
+    },
     setLeftColumn(open: boolean) {
       leftColumnOpen = open;
     },