feat(logs): раздел «Логи» — хвост и свой grep (#16)

- app/logs/grep.py: подмножество grep (шаблон, -i -v -E -c -C N), разбор
  shlex без исполнения, BRE → regex, таймаут на строку и бюджет на поиск,
  лимиты 200 символов / 500 строк вывода
- app/logs/journal.py: каждый поиск в log_queries (L-6)
- бот: выбор контейнера, хвост 50/200 строк или 5 мин/1 ч/24 ч, свой grep
  по 24 ч, длинный результат — файлом .log (L-5)
- логи Docker: не больше 50 000 строк и 5 МБ, сохраняются новейшие
- fix: кнопки меню и /menu, /help больше не проглатываются шагами ввода
  (имя файла, содержимое, сообщение коммита, grep) — фильтр free_input

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

app/runtime/docker.py

@@ -171,7 +171,7 @@ class DockerClient:
     def __init__(self, settings: DockerSettings, transport: httpx.AsyncBaseTransport | None = None) -> None:
         self._s = settings
         self._http = httpx.AsyncClient(base_url=settings.url, timeout=settings.timeout, transport=transport)
-        self._known: set[str] = set()  # ids from the last listing: the only ones card/logs/stats may touch
+        self._known: dict[str, Container] = {}  # the last listing: the only ids card/logs/stats may touch
 
     async def __aenter__(self) -> Self:
         return self
@@ -204,22 +204,22 @@ class DockerClient:
                     labels=labels,
                 )
             )
-        self._known = {c.id for c in result}
+        self._known = {c.id: c for c in result}
         return sorted(result, key=lambda c: c.name)
 
-    async def resolve(self, short_id: str) -> str:
-        """Full id of a managed container by its 12-char prefix (callback data carries only that)."""
-        if not self._known:
-            await self.containers()
-        for full in self._known:
-            if full.startswith(short_id):
-                return full
-        await self.containers()  # maybe recreated since the last listing
-        for full in self._known:
-            if full.startswith(short_id):
-                return full
+    async def get(self, short_id: str) -> Container:
+        """A managed container by its 12-char id prefix (callback data carries only that)."""
+        for attempt in range(2):
+            if attempt or not self._known:
+                await self.containers()  # first use, or recreated since the last listing
+            for full, container in self._known.items():
+                if short_id and full.startswith(short_id):
+                    return container
         raise DockerError(f"container {short_id} is not managed by tgit")
 
+    async def resolve(self, short_id: str) -> str:
+        return (await self.get(short_id)).id
+
     async def inspect(self, container_id: str) -> Details:
         self._guard(container_id)
         d = await self._get_json(f"/containers/{container_id}/json")
@@ -246,15 +246,18 @@ class DockerClient:
         return parse_stats(await self._get_json(f"/containers/{container_id}/stats", params={"stream": "false"}))
 
     async def logs(self, container_id: str, since: datetime | None = None, tail: int | None = None) -> str:
+        """stdout+stderr in order; at most max_log_lines lines and max_log_bytes — the newest ones are kept."""
         self._guard(container_id)
-        params = {"stdout": "1", "stderr": "1"}
+        lines = min(tail, self._s.max_log_lines) if tail is not None else self._s.max_log_lines
+        params = {"stdout": "1", "stderr": "1", "tail": str(lines)}
         if since is not None:
             params["since"] = str(int(since.timestamp()))
-        if tail is not None:
-            params["tail"] = str(tail)
         response = await self._request(f"/containers/{container_id}/logs", params)
-        raw = response.content[: self._s.max_log_bytes]
-        return demux_logs(raw)
+        text = demux_logs(response.content)
+        if len(text) > self._s.max_log_bytes:
+            cut = text[-self._s.max_log_bytes :]
+            text = cut[cut.find("\n") + 1 :]  # drop the torn first line
+        return text
 
     async def ping(self) -> bool:
         try: