diff --git a/__pycache__/app.cpython-36.pyc b/__pycache__/app.cpython-36.pyc
new file mode 100644
index 0000000..76f8aca
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diff --git a/__pycache__/mailer.cpython-36.pyc b/__pycache__/mailer.cpython-36.pyc
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diff --git a/app.py b/app.py
index 362d76d..0d789a9 100644
--- a/app.py
+++ b/app.py
@@ -1,3 +1,4 @@
+from typing import List, Dict, Tuple, Set, Any, Optional, Union
 #!/usr/bin/env python3
 """
 Palladium Z1 Monitor — LD逻辑板使用监控系统
@@ -10,7 +11,6 @@ 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
diff --git a/instance/palladium.db b/instance/palladium.db
new file mode 100644
index 0000000..75c4e21
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diff --git a/mailer.py b/mailer.py
index f817ff1..d25990d 100644
--- a/mailer.py
+++ b/mailer.py
@@ -1,3 +1,4 @@
+from typing import List, Dict, Tuple, Set, Any, Optional, Union
 """
 mailer.py — Palladium Z1 每日报告邮件发送
 
@@ -5,7 +6,6 @@ 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
@@ -60,7 +60,7 @@ def get_config() -> dict:
     }
 
 
-def config_errors(cfg: dict) -> list[str]:
+def config_errors(cfg: dict) -> List[str]:
     """检查配置是否完整可发送。返回缺失/错误项的列表 (空=OK)。"""
     errs = []
     if not cfg["enabled"]:
@@ -416,7 +416,7 @@ def _render_html(data: dict, base_url: str) -> str:
 # ═══════════════════════════════════════════════════════════════════════════
 #  发送
 # ═══════════════════════════════════════════════════════════════════════════
-def render_report(data: dict, cfg: dict) -> tuple[str, str, str]:
+def render_report(data: dict, cfg: dict) -> Tuple[str, str, str]:
     """返回 (subject, html, text)。"""
     latest = data["latest"]
     if latest:
@@ -430,7 +430,7 @@ def render_report(data: dict, cfg: dict) -> tuple[str, str, str]:
     return subject, html, text
 
 
-def _send_smtp(cfg: dict, subject: str, html: str, text: str) -> tuple[bool, str]:
+def _send_smtp(cfg: dict, subject: str, html: str, text: str) -> Tuple[bool, str]:
     """实际 SMTP 发送, 返回 (ok, error_msg)。"""
     msg = MIMEMultipart("alternative")
     msg["Subject"] = subject
@@ -469,7 +469,7 @@ def _send_smtp(cfg: dict, subject: str, html: str, text: str) -> tuple[bool, str
         return (False, f"{type(e).__name__}: {e}")
 
 
-def send_report(cfg: dict | None = None) -> dict:
+def send_report(cfg: Optional[Dict] = None) -> dict:
     """
     收集数据 → 渲染 → 发送。
     返回: {"ok": bool, "subject": str, "recipients": [...], "error": str, "preview_text": str}