feat: add system settings page for admin username and password

Co-authored-by: Cursor <cursoragent@cursor.com>

packages/config/env_file.py

@@ -0,0 +1,60 @@
+"""读写 .env（保留其它键；不记录密钥到日志）。"""
+
+from __future__ import annotations
+
+import os
+import re
+from pathlib import Path
+
+_KEY_RE = re.compile(r"^[A-Za-z_][A-Za-z0-9_]*$")
+
+
+def read_env_value(path: Path, key: str) -> str | None:
+    if not path.is_file():
+        return None
+    for line in path.read_text(encoding="utf-8").splitlines():
+        s = line.strip()
+        if not s or s.startswith("#") or "=" not in s:
+            continue
+        k, v = s.split("=", 1)
+        if k.strip() == key:
+            return v.strip()
+    return None
+
+
+def update_env_file(path: Path, updates: dict[str, str]) -> None:
+    """更新或追加键值；已有键覆盖。"""
+    for key in updates:
+        if not _KEY_RE.fullmatch(key):
+            raise ValueError(f"invalid env key: {key!r}")
+
+    lines: list[str] = []
+    if path.is_file():
+        lines = path.read_text(encoding="utf-8").splitlines()
+
+    seen: set[str] = set()
+    out: list[str] = []
+    for line in lines:
+        raw = line
+        s = line.strip()
+        if s and not s.startswith("#") and "=" in s:
+            k, _ = s.split("=", 1)
+            key = k.strip()
+            if key in updates:
+                out.append(f"{key}={updates[key]}")
+                seen.add(key)
+                continue
+        out.append(raw)
+
+    for key, val in updates.items():
+        if key not in seen:
+            out.append(f"{key}={val}")
+
+    path.parent.mkdir(parents=True, exist_ok=True)
+    text = "\n".join(out)
+    if text and not text.endswith("\n"):
+        text += "\n"
+    path.write_text(text, encoding="utf-8")
+
+    for key, val in updates.items():
+        os.environ[key] = val

packages/config/settings.py

@@ -20,7 +20,9 @@ class Settings(BaseSettings):
     mi_port: int = Field(default=5170, alias="MI_PORT")
     tz: str = Field(default="Asia/Shanghai", alias="TZ")
     auth_secret: str = Field(default="change-me", alias="AUTH_SECRET")
+    admin_username: str = Field(default="admin", alias="ADMIN_USERNAME")
     admin_password: str = Field(default="admin123", alias="ADMIN_PASSWORD")
+    env_file: str = Field(default=".env", alias="ENV_FILE")
 
     # OKX
     okx_api_key: str = Field(default="", alias="OKX_API_KEY")
@@ -56,6 +58,15 @@ class Settings(BaseSettings):
     def db_path(self) -> Path:
         return Path(self.mi_db_path)
 
+    @property
+    def env_file_path(self) -> Path:
+        return Path(self.env_file)
+
+
+def reload_settings() -> Settings:
+    get_settings.cache_clear()
+    return get_settings()
+
 
 @lru_cache
 def get_settings() -> Settings: