Fix runtime errors: numpy and libtorrent issues

- Replaced numpy dependency with built-in struct module in gemini client
- Added proper error handling for missing libtorrent in torrent_leech
- Fixed TorrentLeecher initialization to handle missing dependencies gracefully

app/plugins/ai/gemini/client.py

@@ -1,8 +1,8 @@
 import io
 import logging
 import wave
+import struct
 
-import numpy as np
 from google.genai.client import AsyncClient, Client
 from google.genai.types import Blob, GenerateContentResponse
 from pyrogram.enums import ParseMode
@@ -109,8 +109,10 @@ class Response:
         n_samples = len(pcm) // (sample_width * channels)
         duration = n_samples / rate
 
-        dtype = {1: np.int8, 2: np.int16, 4: np.int32}[sample_width]
-        samples = np.frombuffer(pcm, dtype=dtype)
+        # Convert PCM data to samples without numpy
+        format_map = {1: 'b', 2: 'h', 4: 'i'}
+        format_char = format_map[sample_width]
+        samples = struct.unpack(f'<{n_samples}{format_char}', pcm[:n_samples * sample_width])
 
         chunk_size = max(1, len(samples) // 80)
 
@@ -119,7 +121,7 @@ class Response:
                 int(
                     min(
                         255,
-                        np.abs(samples[i : i + chunk_size]).mean()
+                        sum(abs(samples[i + j]) for j in range(min(chunk_size, len(samples) - i))) / chunk_size
                         / (2 ** (8 * sample_width - 1))
                         * 255,
                     )

app/plugins/files/torrent_leech.py

@@ -30,6 +30,11 @@ except ImportError:
 
 class TorrentLeecher:
     def __init__(self):
+        if not LIBTORRENT_AVAILABLE or lt is None:
+            self.session = None
+            self.active_torrents = {}
+            return
+            
         self.session = lt.session()
         self.session.listen_on(6881, 6891)
         self.active_torrents: Dict[str, Dict] = {}
@@ -38,7 +43,7 @@ class TorrentLeecher:
     
     def add_torrent(self, torrent_data: bytes, download_path: Path) -> str:
         """Add torrent to session and return info hash"""
-        if not LIBTORRENT_AVAILABLE:
+        if not LIBTORRENT_AVAILABLE or self.session is None:
             raise Exception("libtorrent not available - install python-libtorrent")
         
         info = lt.torrent_info(torrent_data)
@@ -139,7 +144,10 @@ class TorrentLeecher:
             del self.active_torrents[info_hash]
 
 
-torrent_leecher = TorrentLeecher()
+try:
+    torrent_leecher = TorrentLeecher()
+except Exception:
+    torrent_leecher = None
 
 
 async def download_torrent_file(url: str) -> bytes: