refactor: review fixes and code improvements

- Add shared proxy module (bot/utils/proxy.py) to eliminate duplicate SOCKS5 parsing
- Fix AI client: escape HTML before Markdown→HTML conversion, unify timeouts,
  make health check optional and disabled by default, handle 429 retries
- Fix ai.py: correct forwarded message handling (aiogram 3.x forward_origin),
  pass relevant summaries via extra_system_content
- Fix dialogue.py: only respond to Astra's messages, use system context instead
  of prompt injection, answer on the limit message before phase transition
- Fix voice.py: load Whisper model in thread pool, safe WAV path generation
- Improve database.py: composite indexes, Boolean is_active, upsert file_id cache,
  add context cleanup helper
- Update weather.py and yadisk_download.py to use shared proxy connector
- Update yadisk.py: validate URL before cache clear, add download size limit,
  wrap sync file ops in to_thread
- Reuse S3 client via lru_cache
- Update setup_commands with /aiclear and /aiuser
- Update README, Dockerfile (Python 3.11), docker-compose (mount models)
- Pin dependency versions, remove unused httpx[socks]
- Add basic pytest tests for layout converter and voice normalization

bot/utils/weather.py

@@ -2,10 +2,9 @@ import logging
 from datetime import datetime
 
 import aiohttp
-from aiohttp_socks import ProxyConnector, ProxyType
 
-from config import API_WEATHER, PROXY_ENABLED, PROXY_URL
-from bot.bot import bot
+from bot.utils.proxy import get_proxy_connector
+from config import API_WEATHER
 
 logger = logging.getLogger(__name__)
 
@@ -28,47 +27,26 @@ def get_wind_direction(deg: float) -> str:
     return "Северо-запад"
 
 
-def _get_connector():
-    if PROXY_ENABLED and PROXY_URL:
-        parsed = PROXY_URL.replace("socks5://", "").replace("socks5h://", "")
-        if "@" in parsed:
-            auth, host_port = parsed.split("@", 1)
-            username, password = auth.split(":", 1)
-        else:
-            username = None
-            password = None
-            host_port = parsed
-
-        host, port = host_port.rsplit(":", 1)
-        port = int(port)
-
-        return ProxyConnector(
-            proxy_type=ProxyType.SOCKS5,
-            host=host,
-            port=port,
-            username=username,
-            password=password,
-        )
-    return None
-
-
 async def get_weather(message) -> None:
-    if len(message.text.split(maxsplit=1)) == 1:
-        await bot.send_message(message.chat.id, "Пожалуйста, укажите город.")
+    text_parts = message.text.split(maxsplit=1)
+    if len(text_parts) == 1:
+        await message.answer("Пожалуйста, укажите город.")
         return
 
-    city = message.text.split(maxsplit=1)[1].strip()
+    city = text_parts[1].strip()
     url = "https://api.openweathermap.org/data/2.5/weather"
     params = {"q": city, "appid": API_WEATHER, "units": "metric", "lang": "ru"}
 
-    timeout = aiohttp.ClientTimeout(total=30, sock_connect=15, sock_read=15)
-    connector = _get_connector()
+    connector = get_proxy_connector()
 
     try:
-        async with aiohttp.ClientSession(timeout=timeout, connector=connector) as session:
+        async with aiohttp.ClientSession(
+            timeout=aiohttp.ClientTimeout(total=30, sock_connect=15, sock_read=15),
+            connector=connector,
+        ) as session:
             async with session.get(url, params=params) as response:
                 if response.status == 404:
-                    await bot.send_message(message.chat.id, "Город не найден. Пожалуйста, уточните запрос.")
+                    await message.answer("Город не найден. Пожалуйста, уточните запрос.")
                     return
                 response.raise_for_status()
                 weather_data = await response.json()
@@ -103,16 +81,16 @@ async def get_weather(message) -> None:
             f"Видимость: {visibility} м\n"
             f"Восход: {sunrise_time}, закат: {sunset_time}"
         )
-        await bot.send_message(message.chat.id, weather_message, parse_mode=None)
+        await message.answer(weather_message, parse_mode=None)
     except aiohttp.ClientResponseError as exc:
         logger.error("HTTP ошибка погоды: %s", exc)
-        await bot.send_message(message.chat.id, "При получении данных произошла ошибка, попробуйте еще раз.")
+        await message.answer("При получении данных произошла ошибка, попробуйте еще раз.")
     except aiohttp.ClientError as exc:
         logger.error("Ошибка запроса погоды: %s", exc)
-        await bot.send_message(message.chat.id, "Не удалось связаться с погодным сервисом.")
+        await message.answer("Не удалось связаться с погодным сервисом.")
     except Exception as exc:
         logger.exception("Неожиданная ошибка погоды: %s", exc)
-        await bot.send_message(message.chat.id, "Произошла ошибка при обработке погоды.")
+        await message.answer("Произошла ошибка при обработке погоды.")
     finally:
         if connector:
             await connector.close()