From 187f37f8e772071dc5f6cb65a434b44648ca020d Mon Sep 17 00:00:00 2001
From: Hermes <hermes@local>
Date: Wed, 8 Jul 2026 12:13:31 +0800
Subject: [PATCH] fix: add 'from __future__ import annotations' for Python
 <3.10
MIME-Version: 1.0
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PEP 585 内建泛型 (tuple[str, str], dict[str, int]) 在 Python 3.9 之前不支持。
PEP 563 让所有 type hint 变成字符串, 兼容 Python 3.7+。

错误: 'type' object is not subscriptable
影响: app.py:1184 start_email_scheduler() -> import mailer -> mailer.py:417
修复: mailer.py / app.py 顶部加 from __future__ import annotations
---
 palladium-monitor/app.py    | 2 ++
 palladium-monitor/mailer.py | 2 ++
 2 files changed, 4 insertions(+)

diff --git a/palladium-monitor/app.py b/palladium-monitor/app.py
index e20dadd..362d76d 100644
--- a/palladium-monitor/app.py
+++ b/palladium-monitor/app.py
@@ -10,6 +10,8 @@ Palladium Z1 Monitor — LD逻辑板使用监控系统
   2. API 推送 — 在 Palladium 主机运行 collect.py 远程推送
 """
 
+from __future__ import annotations  # PEP 563: 兼容 Python 3.7+ (避免 PEP 585 泛型语法)
+
 import os
 import re
 import io
diff --git a/palladium-monitor/mailer.py b/palladium-monitor/mailer.py
index b0c7c65..f817ff1 100644
--- a/palladium-monitor/mailer.py
+++ b/palladium-monitor/mailer.py
@@ -5,6 +5,8 @@ mailer.py — Palladium Z1 每日报告邮件发送
 所有配置都从环境变量读 (生产建议用 systemd EnvironmentFile 或 .env)。
 """
 
+from __future__ import annotations  # PEP 563: 让所有 type hint 变字符串, 兼容 Python 3.7+
+
 import os
 import smtplib
 import socket