diff --git a/src/beaver_gateway/frontends/telegram/frontend.py b/src/beaver_gateway/frontends/telegram/frontend.py
index 0e6e6bf..c8e02ad 100644
--- a/src/beaver_gateway/frontends/telegram/frontend.py
+++ b/src/beaver_gateway/frontends/telegram/frontend.py
@@ -19,8 +19,10 @@ import logging
 import tempfile
 import time
 from dataclasses import dataclass, field
+from datetime import datetime
 from pathlib import Path
 from typing import TYPE_CHECKING, Any, Literal, cast
+from zoneinfo import ZoneInfo
 
 from aiogram import Bot
 from aiogram.client.default import DefaultBotProperties
@@ -71,14 +73,21 @@ _HELP = "General - мастер, любой другой топик - ветка
 class Attachments:
     """Where files from Telegram go.
 
-    ``ephemeral`` - under the gateway's data dir, swept after ``keep_days``;
-    ``vault`` - into a directory the agent owns. Pulling what is worth
-    keeping into the vault is the agent's job either way.
+    Files land in ``<root>/YYYY-MM-DD/<unixts>-<name>`` (the day in ``tz``)
+    and whatever is older than ``keep_days`` is swept; ``None`` never
+    sweeps. ``ephemeral`` - under the gateway's data dir; ``vault`` -
+    ``dir`` is an inbox inside the agent's zone: the agent moves keepers
+    next to the note, the rest is swept after ``keep_days``.
     """
 
     mode: Literal["ephemeral", "vault"] = "ephemeral"
     dir: Path | None = None
-    keep_days: int = 7
+    keep_days: int | None = 7
+    tz: str = "UTC"
+
+    def day(self, now: float | None = None) -> str:
+        stamp = datetime.fromtimestamp(now or time.time(), tz=ZoneInfo(self.tz))
+        return stamp.date().isoformat()
 
     @property
     def root(self) -> Path:
@@ -174,7 +183,6 @@ class TelegramFrontend(Frontend):
             self.chat_id,
             getattr(me, "has_topics_enabled", None),
         )
-        self._sweep_attachments()
         await self.bot.set_my_commands(
             [BotCommand(command=c, description=d) for c, d in _COMMAND_HELP]
         )
@@ -183,6 +191,7 @@ class TelegramFrontend(Frontend):
                 tg.create_task(self.inbox.run())
                 tg.create_task(self.outbox.run())
                 tg.create_task(self._events())
+                tg.create_task(self._sweep_loop())
         finally:
             for draft in list(self._drafts.values()):
                 await draft.stop()
@@ -373,7 +382,11 @@ class TelegramFrontend(Frontend):
             return
         if message.chat.id != self.chat_id:
             return
-        in_topic = message.is_topic_message or message.forum_topic_created is not None
+        in_topic = (
+            message.is_topic_message
+            or message.forum_topic_created is not None
+            or message.forum_topic_edited is not None
+        )
         thread_id = message.message_thread_id if in_topic else None
         is_master = (
             thread_id is None or self._ext(thread_id) == await self._master_ext()
@@ -382,10 +395,12 @@ class TelegramFrontend(Frontend):
             return
         if message.forum_topic_edited is not None and thread_id is not None:
             if message.forum_topic_edited.name:
-                self._topic_names[thread_id] = message.forum_topic_edited.name
+                await self._on_topic_renamed(
+                    thread_id, message.forum_topic_edited.name, is_master=is_master
+                )
             return
         text = (message.text or message.caption or "").strip()
-        attachment = await self._save_attachment(message, thread_id)
+        attachment = await self._save_attachment(message)
         if attachment:
             text = f"{text}\n\n{attachment}".strip()
         if not text:
@@ -414,6 +429,14 @@ class TelegramFrontend(Frontend):
         if conv.running_turn or conv.pending_question:
             await self._react(message, item.id)
 
+    async def _on_topic_renamed(
+        self, thread_id: int, name: str, *, is_master: bool
+    ) -> None:
+        self._topic_names[thread_id] = name
+        conv = None if is_master else await self._live(thread_id)
+        if conv is not None:
+            await self.conversations.set_title(conv, name)
+
     async def _live(self, thread_id: int) -> Conversation | None:
         conv = await self.conversations.find_bound(
             frontend=FRONTEND, external_id=self._ext(thread_id)
@@ -446,13 +469,15 @@ class TelegramFrontend(Frontend):
         with contextlib.suppress(TelegramAPIError):
             await self.bot.set_message_reaction(target[0], target[1], reaction=[])
 
-    async def _save_attachment(
-        self, message: Message, thread_id: int | None
-    ) -> str | None:
+    async def _save_attachment(self, message: Message) -> str | None:
         file_id: str | None = None
         name: str | None = None
         kind = ""
         size: int | None = None
+        if message.sticker:
+            return "[вложение: стикер - не поддерживается]"
+        if message.animation:
+            return "[вложение: анимация - не поддерживается]"
         if message.photo:
             photo = message.photo[-1]
             file_id, kind, size = photo.file_id, "фото", photo.file_size
@@ -496,12 +521,13 @@ class TelegramFrontend(Frontend):
                 f"[вложение: {kind} {name}, {size // 1024 // 1024} МБ - "
                 "больше 20 МБ, Telegram не отдаёт ботам]"
             )
-        folder = self.attachments.root / (self._ext(thread_id).replace("/", "_"))
+        now = time.time()
+        folder = self.attachments.root / self.attachments.day(now)
         folder.mkdir(parents=True, exist_ok=True)
         with contextlib.suppress(OSError):
             self.attachments.root.chmod(0o755)
             folder.chmod(0o755)
-        path = folder / f"{int(time.time())}-{Path(name).name}"
+        path = folder / f"{int(now)}-{Path(name).name}"
         try:
             await self.bot.download(file_id, destination=path)
             path.chmod(0o644)
@@ -509,19 +535,33 @@ class TelegramFrontend(Frontend):
             _log.warning("attachment download failed: %s", exc)
             return f"[вложение: {kind} {name} - не скачалось: {exc}]"
         shown = f", {size // 1024} КБ" if size else ""
-        return f"[вложение: {kind} {path}{shown}]"
+        keep = self.attachments.keep_days
+        if keep is None:
+            return f"[вложение: {kind} {path}{shown}]"
+        return (
+            f"[вложение: {kind} {path}{shown}; хранится {keep} дн., "
+            "перенеси в vault, если нужно]"
+        )
+
+    async def _sweep_loop(self, interval: float = 6 * 3600) -> None:
+        while True:
+            self._sweep_attachments()
+            await asyncio.sleep(interval)
 
     def _sweep_attachments(self) -> None:
-        if self.attachments.mode != "ephemeral":
-            return
+        keep = self.attachments.keep_days
         root = self.attachments.root
-        if not root.exists():
+        if keep is None or not root.exists():
             return
-        cutoff = time.time() - self.attachments.keep_days * 86400
+        cutoff = time.time() - keep * 86400
         for path in root.rglob("*"):
             with contextlib.suppress(OSError):
                 if path.is_file() and path.stat().st_mtime < cutoff:
                     path.unlink()
+        for folder in root.iterdir():
+            with contextlib.suppress(OSError):
+                if folder.is_dir() and not any(folder.iterdir()):
+                    folder.rmdir()
 
     # ---- commands --------------------------------------------------------
 
@@ -634,7 +674,10 @@ class TelegramFrontend(Frontend):
         if kind == "conversation.bound":
             self._targets.pop(str(event.get("conversation_id")), None)
             return
-        if kind in ("delivery.sent", "delivery.failed", "conversation.created"):
+        if kind == "delivery.failed":
+            await self._on_delivery_failed(event)
+            return
+        if kind in ("delivery.sent", "conversation.created"):
             return
         key = event.get("conversation_id")
         if not isinstance(key, str):
@@ -661,10 +704,13 @@ class TelegramFrontend(Frontend):
                 draft = self._drafts.get(key)
                 if draft is not None:
                     await draft.stop()
-                if event.get("stop") == "error" and event.get("origin") == "user":
+                if event.get("stop") == "error":
+                    origin = event.get("origin")
                     await self._deliver(
                         conv,
-                        "⚠️ тёрн упал, смотри логи gateway",
+                        "⚠️ тёрн упал, смотри логи gateway"
+                        if origin == "user"
+                        else f"⚠️ фоновый тёрн ({origin}) упал, смотри логи gateway",
                         turn_id=event.get("turn_id"),
                         key=f"{event.get('turn_id')}:error",
                     )
@@ -687,6 +733,38 @@ class TelegramFrontend(Frontend):
             case "conversation.merged":
                 await self._deliver(conv, "✅ слито в мастер", key=f"{key}:merged")
 
+    async def _on_delivery_failed(self, event: Event) -> None:
+        row = event.get("conversation_row")
+        _log.error(
+            "delivery to %s/%s (conversation row %s) failed: %s",
+            event.get("chat_id"),
+            event.get("thread_id"),
+            row,
+            event.get("error"),
+        )
+        if not event.get("gone") or not isinstance(row, int):
+            return
+        conv = await self.conversations.get_row(row)
+        if conv is None:
+            return
+        bound = next(
+            (
+                b
+                for b in await self.conversations.bindings(conv)
+                if b.frontend == FRONTEND and b.visible
+            ),
+            None,
+        )
+        if bound is None:
+            return
+        _log.warning(
+            "window %s of %s is gone; unbinding", bound.external_id, conv.external_id
+        )
+        await self.conversations.bind(
+            conv, frontend=FRONTEND, external_id=bound.external_id, visible=False
+        )
+        self._targets.pop(conv.external_id, None)
+
     async def _on_reply(self, conv: Conversation, event: Event) -> None:
         turn_id = str(event.get("turn_id") or "")
         origin = str(event.get("item_origin") or "")
@@ -789,6 +867,7 @@ class TelegramFrontend(Frontend):
         ask = self._asks.get(question_id)
         if ask is None or not qi_raw.isdigit():
             await self._callback_reply(query, "вопрос уже закрыт")
+            await self._strip_keyboard(query)
             return
         qi = int(qi_raw)
         question = ask.questions[qi]
@@ -831,6 +910,17 @@ class TelegramFrontend(Frontend):
             if not self.conversations.answer(question_id, answer):
                 await self._edit_asks(ask, "⌛ время вышло - ответь текстом")
 
+    async def _strip_keyboard(self, query: CallbackQuery) -> None:
+        message = query.message if isinstance(query.message, Message) else None
+        if message is None:
+            return
+        with contextlib.suppress(TelegramAPIError):
+            await self.bot.edit_message_reply_markup(
+                chat_id=message.chat.id,
+                message_id=message.message_id,
+                reply_markup=None,
+            )
+
     async def _callback_reply(self, query: CallbackQuery, text: str | None) -> None:
         with contextlib.suppress(TelegramAPIError):
             await self.bot.answer_callback_query(query.id, text=text)
diff --git a/src/beaver_gateway/frontends/telegram/outbox.py b/src/beaver_gateway/frontends/telegram/outbox.py
index d95cb04..46837a7 100644
--- a/src/beaver_gateway/frontends/telegram/outbox.py
+++ b/src/beaver_gateway/frontends/telegram/outbox.py
@@ -143,7 +143,7 @@ class Outbox:
             if "parse" in text and not row.plain:
                 await self._retry(row, str(exc), delay=0.0, plain=True)
             elif any(marker in text for marker in _GONE):
-                await self._fail(row, str(exc))
+                await self._fail(row, str(exc), gone=True)
             else:
                 await self._fail(row, str(exc))
         except (TelegramNotFound, TelegramForbiddenError) as exc:
@@ -180,7 +180,7 @@ class Outbox:
         if delay < 5.0:
             self._wake.set()
 
-    async def _fail(self, row: Delivery, error: str) -> None:
+    async def _fail(self, row: Delivery, error: str, *, gone: bool = False) -> None:
         _log.error(
             "delivery #%s to %s/%s given up: %s",
             row.id,
@@ -196,6 +196,7 @@ class Outbox:
             chat_id=row.chat_id,
             thread_id=row.thread_id,
             error=error,
+            gone=gone,
         )
 
     async def _mark(
diff --git a/tests/test_telegram.py b/tests/test_telegram.py
index 3e8d99b..8ba0323 100644
--- a/tests/test_telegram.py
+++ b/tests/test_telegram.py
@@ -13,8 +13,14 @@ from claude_agent_sdk import PermissionResultAllow, PermissionResultDeny
 from beaver_gateway.core.registry import McpRegistry
 from beaver_gateway.core.transcript import build_entries
 from beaver_gateway.frontends.base import GatewayRuntime
-from beaver_gateway.frontends.telegram import TelegramFrontend
-from beaver_gateway.frontends.telegram.render import chunks, status_label, to_html
+from beaver_gateway.frontends.telegram import Attachments, TelegramFrontend
+from beaver_gateway.frontends.telegram.render import (
+    LIMIT,
+    chunks,
+    status_label,
+    to_html,
+    to_html_tail,
+)
 from beaver_gateway.storage.models import ConversationBinding, Delivery, TelegramUpdate
 from sqlmodel import select
 from test_conversations import ScriptedClient, StubFrontend, World
@@ -33,6 +39,7 @@ class FakeBot:
         self.reactions: list[tuple[int, list[Any]]] = []
         self.fail_sends = 0
         self.reject_html = False
+        self.gone_threads: set[int] = set()
         self.order: list[tuple[str, int | None]] = []
         self._message_id = 100
         self.session = SimpleNamespace(close=self._close)
@@ -64,6 +71,11 @@ class FakeBot:
                 method=SendMessage(chat_id=0, text="x"),
                 message="Bad Request: can't parse entities",
             )
+        if message_thread_id in self.gone_threads:
+            raise TelegramBadRequest(
+                method=SendMessage(chat_id=0, text="x"),
+                message="Bad Request: message thread not found",
+            )
         self._message_id += 1
         self.order.append(("message", message_thread_id))
         self.sent.append(
@@ -86,7 +98,8 @@ class FakeBot:
 
     async def create_forum_topic(self, chat_id, name, **_: Any) -> Any:
         self.topics.append(name)
-        return SimpleNamespace(message_thread_id=900 + len(self.topics), name=name)
+        created = sum(1 for t in self.topics if not t.startswith("edit:"))
+        return SimpleNamespace(message_thread_id=900 + created, name=name)
 
     async def edit_forum_topic(
         self, chat_id, message_thread_id, name=None, **_: Any
@@ -148,6 +161,33 @@ class FakeBot:
             }
         )
 
+    def topic_edited(self, name: str, thread: int) -> None:
+        self.push(
+            {
+                "message": {
+                    "message_id": 10 + len(self.updates),
+                    "date": 1700000000,
+                    "chat": {"id": USER, "type": "private"},
+                    "from": {"id": USER, "is_bot": False, "first_name": "h"},
+                    "message_thread_id": thread,
+                    "is_topic_message": True,
+                    "forum_topic_edited": {"name": name},
+                }
+            }
+        )
+
+    def media(self, body: dict[str, Any], *, thread: int | None = None) -> None:
+        message: dict[str, Any] = {
+            "message_id": 10 + len(self.updates),
+            "date": 1700000000,
+            "chat": {"id": USER, "type": "private"},
+            "from": {"id": USER, "is_bot": False, "first_name": "h"},
+            **body,
+        }
+        if thread is not None:
+            message |= {"message_thread_id": thread, "is_topic_message": True}
+        self.push({"message": message})
+
     def callback(self, data: str, message_id: int) -> None:
         self.push(
             {
@@ -455,9 +495,10 @@ async def test_commands_status_merge_and_new(stack: Stack) -> None:
         frontend="telegram", external_id=f"{USER}/11"
     )
     assert branch.status == "merged"
+    assert stack.bot.topics == ["🦫 General", "edit:11:✅ work"]
     stack.bot.message("/new отчёт")
     await stack.until(lambda: stack.sent_with("в новом топике"), what="new topic")
-    assert stack.bot.topics == ["🦫 General", "отчёт"]
+    assert stack.bot.topics == ["🦫 General", "edit:11:✅ work", "отчёт"]
     child = await stack.world.conversations.find_bound(
         frontend="telegram", external_id=f"{USER}/902"
     )
@@ -583,18 +624,112 @@ def test_render_helpers() -> None:
         == "<b>жирно</b> и <code>code</code> &lt;b&gt;"
     )
     assert to_html("# Заголовок\n- пункт") == "<b>Заголовок</b>\n• пункт"
-    assert to_html("```py\nx = 1\n```") == "<pre>x = 1</pre>"
+    assert to_html("```\nx < 1 & y\n```") == "<pre>x &lt; 1 &amp; y</pre>"
+    assert (
+        to_html("```py\nunterminated\n")
+        == '<pre><code class="language-py">unterminated</code></pre>'
+    )
     assert (
         to_html("[док](https://a.b/c?x=1&y=2)")
         == '<a href="https://a.b/c?x=1&amp;y=2">док</a>'
     )
+    assert (
+        to_html("[tg](tg://user?id=1) https://x.y/a_b_c")
+        == '<a href="tg://user?id=1">tg</a> https://x.y/a_b_c'
+    )
+    assert to_html("![alt](https://x.y/i.png) ![](https://x.y/j.png)") == (
+        '<a href="https://x.y/i.png">alt</a> <a href="https://x.y/j.png">https://x.y/j.png</a>'
+    )
+    assert to_html("~~нет~~ _к_ *к* __ж__") == "<s>нет</s> <i>к</i> <i>к</i> <b>ж</b>"
+    assert to_html("---\n***\n___") == "———\n———\n———"
+    assert to_html("`**raw** [[x]]`") == "<code>**raw** [[x]]</code>"
     parts = chunks("абв\n\n" + "г" * 30 + "\n\n" + "д" * 30, limit=40)
     assert parts == ["абв\n\n" + "г" * 30, "д" * 30]
+    assert chunks("   \n ") == []
     assert status_label("Read", {"file_path": "/x"}) == "читаю vault"
     assert status_label("mcp__firefly__list_accounts", None) == "firefly: list_accounts"
     assert status_label("Foo", {"command": "ls -la"}) == "Foo ls -la"
 
 
+def test_render_wikilinks() -> None:
+    assert to_html("[[Note]]") == "<u>Note</u>"
+    assert to_html("[[Note|alias]]") == "<u>alias</u>"
+    assert to_html("[[Note#heading]]") == "<u>Note › heading</u>"
+    assert to_html("[[A & B|**x**]]") == "<u>**x**</u>"
+
+
+def test_render_blocks() -> None:
+    assert (
+        to_html("> цитата **жирно**\n> вторая\n\nтекст")
+        == "<blockquote>цитата <b>жирно</b>\nвторая</blockquote>\n\nтекст"
+    )
+    assert (
+        to_html("1. один\n2) два\n  - [ ] нет\n- [x] да")
+        == "1. один\n2. два\n  ☐ нет\n☑ да"
+    )
+    assert (
+        to_html("| a | bb |\n|---|:--:|\n| ccc | d |\n| e |")
+        == "<pre>a   | bb\nccc | d\ne</pre>"
+    )
+    assert (
+        to_html("```python\nprint(1)\n```")
+        == '<pre><code class="language-python">print(1)</code></pre>'
+    )
+    assert (
+        to_html("||секрет|| и `||нет||`")
+        == "<tg-spoiler>секрет</tg-spoiler> и <code>||нет||</code>"
+    )
+
+
+def test_chunks_split_fence_into_valid_fences() -> None:
+    body = "\n".join(f"x = {i} & {i}" for i in range(400))
+    text = f"до\n```python\n{body}\n```\nпосле"
+    parts = chunks(text, limit=1500)
+    assert len(parts) > 2
+    assert parts[0] == "до"
+    assert all(p.startswith("```python\n") and p.endswith("```") for p in parts[1:-1])
+    assert parts[-1].endswith("```\nпосле")
+    fences = [p.removesuffix("\nпосле") for p in parts if p.startswith("```")]
+    inner = [p.removeprefix("```python\n").removesuffix("\n```") for p in fences]
+    assert "\n".join(inner) == body
+    for p in parts:
+        rendered = to_html(p)
+        assert 0 < len(rendered) <= 1500
+    for p in fences:
+        assert to_html(p).startswith('<pre><code class="language-python">')
+        assert to_html(p).endswith("</code></pre>")
+
+
+def test_chunks_split_blockquote_and_stay_under_limit() -> None:
+    text = "\n".join(f"> строка {i} **ж** <" for i in range(300))
+    parts = chunks(text, limit=1000)
+    assert len(parts) > 1
+    for p in parts:
+        rendered = to_html(p)
+        assert len(rendered) <= 1000
+        assert rendered.startswith("<blockquote>") and rendered.endswith(
+            "</blockquote>"
+        )
+    assert "".join(parts).count("строка") == 300
+    long_line = "слово " * 2000
+    parts = chunks(long_line, limit=LIMIT)
+    assert all(0 < len(to_html(p)) <= LIMIT for p in parts)
+    assert " ".join(parts).split() == long_line.split()
+
+
+def test_to_html_tail_inside_fence() -> None:
+    full = (
+        "intro\n```py\n" + "\n".join(f"code {i} <" for i in range(200)) + "\n```\nafter"
+    )
+    rendered = to_html_tail(full, 100)
+    assert rendered.startswith('<pre><code class="language-py">code ')
+    assert rendered.endswith("</code></pre>\nafter")
+    assert "```" not in rendered
+    assert to_html_tail("a\n> b\n> c", 3) == "<blockquote>c</blockquote>"
+    assert to_html_tail("**x** y", 100) == "<b>x</b> y"
+    assert to_html_tail("x" * 50, 10) == "x" * 10
+
+
 async def test_message_with_a_link_preview_is_stored_and_answered(stack: Stack) -> None:
     stack.bot.push(
         {
@@ -614,3 +749,171 @@ async def test_message_with_a_link_preview_is_stored_and_answered(stack: Stack)
     preview = rows[0].payload["message"]["link_preview_options"]
     assert preview["url"] == "https://x.y"
     assert preview.get("is_disabled") is None
+
+
+def _photo(caption: str) -> dict[str, Any]:
+    return {
+        "caption": caption,
+        "photo": [
+            {
+                "file_id": "f1",
+                "file_unique_id": "u1",
+                "width": 1,
+                "height": 1,
+                "file_size": 2048,
+            }
+        ],
+    }
+
+
+async def test_attachments_land_in_day_folder_with_keep_note(stack: Stack) -> None:
+    root = Path(tempfile.mkdtemp(prefix="beaver-att-"))
+    stack.tg.attachments = Attachments(dir=root, keep_days=3, tz="Asia/Bangkok")
+    stack.bot.media(_photo("смотри"))
+    await stack.until(lambda: stack.sent_with("смотри"), what="reply")
+    prompt = next(
+        p for c in ScriptedClient.instances for p in c.prompts if "смотри" in p
+    )
+    (day,) = list(root.iterdir())
+    assert day.name == stack.tg.attachments.day()
+    (saved,) = list(day.iterdir())
+    assert saved.read_bytes() == b"data" and saved.name.endswith("-u1.jpg")
+    assert prompt.endswith(
+        f"смотри\n\n[вложение: фото {saved}, 2 КБ; хранится 3 дн., "
+        "перенеси в vault, если нужно]"
+    )
+    stack.tg.attachments = Attachments(dir=root, keep_days=None)
+    stack.bot.media(_photo("ещё"))
+    await stack.until(lambda: stack.sent_with("ещё"), what="second reply")
+    prompt = next(p for c in ScriptedClient.instances for p in c.prompts if "ещё" in p)
+    assert prompt.endswith(" КБ]") and "хранится" not in prompt
+
+
+async def test_sticker_alone_becomes_an_unsupported_note(stack: Stack) -> None:
+    stack.bot.media(
+        {
+            "sticker": {
+                "file_id": "s1",
+                "file_unique_id": "su1",
+                "type": "regular",
+                "width": 1,
+                "height": 1,
+                "is_animated": False,
+                "is_video": False,
+            }
+        }
+    )
+    await stack.until(lambda: stack.sent_with("стикер"), what="reply")
+    prompt = next(
+        p for c in ScriptedClient.instances for p in c.prompts if "стикер" in p
+    )
+    assert prompt.endswith("[вложение: стикер - не поддерживается]")
+
+
+def test_sweep_drops_old_files_and_empty_day_folders() -> None:
+    root = Path(tempfile.mkdtemp(prefix="beaver-sweep-"))
+    old = root / "2020-01-01" / "1-old.jpg"
+    old.parent.mkdir()
+    old.write_bytes(b"x")
+    import os
+
+    os.utime(old, (1_577_836_800, 1_577_836_800))
+    fresh = root / "2099-01-01" / "2-new.jpg"
+    fresh.parent.mkdir()
+    fresh.write_bytes(b"y")
+    tg = TelegramFrontend(
+        token="t", user_id=USER, attachments=Attachments(dir=root, keep_days=None)
+    )
+    tg._sweep_attachments()  # noqa: SLF001
+    assert old.exists()
+    tg.attachments = Attachments(dir=root, keep_days=7)
+    tg._sweep_attachments()  # noqa: SLF001
+    assert not old.parent.exists() and fresh.exists()
+
+
+async def test_topic_rename_updates_the_title(stack: Stack) -> None:
+    stack.bot.topic_created("план", 7)
+    stack.bot.message("hello", thread=7)
+    await stack.until(lambda: stack.sent_with("hello"), what="reply")
+    stack.bot.topic_edited("новое имя", 7)
+
+    async def titled() -> Any:
+        conv = await stack.world.conversations.find_bound(
+            frontend="telegram", external_id=f"{USER}/7"
+        )
+        return conv if conv is not None and conv.title == "новое имя" else None
+
+    deadline = asyncio.get_running_loop().time() + 5
+    branch = None
+    while branch is None and asyncio.get_running_loop().time() < deadline:
+        branch = await titled()
+        await asyncio.sleep(0.02)
+    assert branch is not None
+    stack.tg._topic_names.clear()  # noqa: SLF001
+    assert await stack.tg.mark_topic(branch)
+    assert stack.bot.topics[-1] == "edit:7:✅ новое имя"
+
+
+async def test_unknown_callback_strips_the_keyboard(stack: Stack) -> None:
+    stack.bot.callback("q:nope:0:1", 555)
+    await stack.until(
+        lambda: {"message_id": 555, "markup": None} in stack.bot.edits,
+        what="keyboard removed",
+    )
+
+
+async def test_failed_background_turn_is_reported_once(stack: Stack) -> None:
+    stack.bot.message("hi")
+    await stack.until(lambda: stack.sent_with("hi"), what="reply")
+    master = await stack.world.conversations.find_bound(
+        frontend="telegram", external_id=GENERAL
+    )
+    event = {
+        "type": "turn.end",
+        "conversation_id": master.external_id,
+        "turn_id": "t-err",
+        "origin": "крон",
+        "stop": "error",
+    }
+    await stack.tg._on_event(event)  # noqa: SLF001
+    await stack.tg._on_event(event)  # noqa: SLF001
+    await stack.until(
+        lambda: stack.sent_with("фоновый тёрн (крон) упал"), what="notice"
+    )
+    await asyncio.sleep(0.2)
+    assert len([m for m in stack.bot.sent if "упал" in m["text"]]) == 1
+    await stack.tg._on_event({**event, "turn_id": "t-user", "origin": "user"})  # noqa: SLF001
+    notice = await stack.until(lambda: stack.sent_with("⚠️ тёрн упал"), what="user")
+    assert "фоновый" not in notice["text"]
+
+
+async def test_gone_topic_unbinds_and_the_next_message_starts_afresh(
+    stack: Stack,
+) -> None:
+    stack.bot.message("hello", thread=7)
+    await stack.until(lambda: stack.sent_with("hello"), what="reply")
+    branch = await stack.world.conversations.find_bound(
+        frontend="telegram", external_id=f"{USER}/7"
+    )
+    stack.bot.gone_threads.add(7)
+    await stack.world.conversations.say(branch, "psst")
+
+    async def unbound() -> bool:
+        rows = await stack.world.conversations.bindings(branch)
+        return all(not b.visible for b in rows)
+
+    deadline = asyncio.get_running_loop().time() + 5
+    while not await unbound() and asyncio.get_running_loop().time() < deadline:
+        await asyncio.sleep(0.02)
+    assert await unbound()
+    assert branch.external_id not in stack.tg._targets  # noqa: SLF001
+    async with stack.world.db.session() as session:
+        rows = list((await session.exec(select(Delivery))).all())
+    assert [r.status for r in rows if r.text == "psst"] == ["failed"]
+    stack.bot.gone_threads.clear()
+    stack.bot.message("again", thread=7)
+    await stack.until(lambda: stack.sent_with("again"), what="fresh reply")
+    fresh = await stack.world.conversations.find_bound(
+        frontend="telegram", external_id=f"{USER}/7"
+    )
+    assert fresh is not None and fresh.id != branch.id and fresh.status == "open"