feat: Add core mail service and proxy pool modules, and integrate them into the bot.

bot.py

@@ -265,15 +265,54 @@ async def cmd_proxytest(update: Update, context: ContextTypes.DEFAULT_TYPE):
         await update.message.reply_text("❌ 代理池为空（proxy.txt 不存在或无有效代理）")
         return
 
+    total = pp.count
     status_msg = await update.message.reply_text(
-        f"🔍 正在测试 {pp.count} 个代理...（可能需要一些时间）"
+        f"🔍 正在测试 {total} 个代理...\n"
+        f"{_progress_bar(0, total)}",
+        parse_mode="HTML",
     )
 
-    # 在线程中执行测试避免阻塞事件循环
     loop = asyncio.get_event_loop()
-    results = await loop.run_in_executor(None, pp.test_all)
 
-    # 构建结果报告
+    # 在后台线程中运行测试，通过回调更新进度
+    def _run_test():
+        ok_count = 0
+        fail_count = 0
+        last_update_time = 0
+
+        def on_progress(current, total, result):
+            nonlocal ok_count, fail_count, last_update_time
+            if result["ok"]:
+                ok_count += 1
+            else:
+                fail_count += 1
+
+            # 限制更新频率：最少 2 秒更新一次，或者最后一个时强制更新
+            now = time.time()
+            is_last = (current == total)
+            if not is_last and (now - last_update_time) < 2:
+                return
+            last_update_time = now
+
+            icon = "✅" if result["ok"] else "❌"
+            latency = f"{result['latency_ms']}ms" if result.get('latency_ms', -1) > 0 else "-"
+
+            text = (
+                f"🔍 <b>代理测试中...</b>\n"
+                f"{_progress_bar(current, total)}\n\n"
+                f"✅ 通过: {ok_count}  ❌ 失败: {fail_count}\n\n"
+                f"最新: {icon} <code>{result['proxy']}</code> {latency}"
+            )
+
+            asyncio.run_coroutine_threadsafe(
+                _edit_or_send(status_msg, text), loop
+            )
+
+        return pp.test_all(progress_callback=on_progress)
+
+    results = await loop.run_in_executor(None, _run_test)
+
+    # 构建最终结果报告
     ok_count = sum(1 for r in results if r["ok"])
     fail_count = len(results) - ok_count