初始化 HyperNode-AI 控制面。

包含节点账本、每日清算，以及 Ubuntu 交互式部署脚本。

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

app/database.py

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+"""数据库引擎与会话。SQLite 仅用于本地启动，生产环境把 DATABASE_URL 指到 PostgreSQL。"""
+
+from __future__ import annotations
+
+from collections.abc import Iterator
+from contextlib import contextmanager
+from datetime import datetime, timezone
+
+from sqlalchemy import DateTime, create_engine
+from sqlalchemy.orm import DeclarativeBase, Session, sessionmaker
+from sqlalchemy.types import TypeDecorator
+
+from app.config import settings
+
+
+class UtcDateTime(TypeDecorator):
+    """统一读写 UTC，避免 SQLite 把时区信息丢掉后比较失败。"""
+
+    impl = DateTime
+    cache_ok = True
+
+    def process_bind_param(self, value, dialect):
+        if value is None:
+            return None
+        if value.tzinfo is None:
+            value = value.replace(tzinfo=timezone.utc)
+        return value.astimezone(timezone.utc)
+
+    def process_result_value(self, value, dialect):
+        if value is None:
+            return None
+        if isinstance(value, str):
+            text = value.replace("Z", "+00:00")
+            value = datetime.fromisoformat(text)
+        if value.tzinfo is None:
+            return value.replace(tzinfo=timezone.utc)
+        return value.astimezone(timezone.utc)
+
+
+class Base(DeclarativeBase):
+    pass
+
+
+connect_args = {"check_same_thread": False} if settings.database_url.startswith("sqlite") else {}
+engine = create_engine(settings.database_url, connect_args=connect_args, pool_pre_ping=True)
+SessionLocal = sessionmaker(bind=engine, autoflush=False, expire_on_commit=False)
+
+
+@contextmanager
+def session_scope() -> Iterator[Session]:
+    session = SessionLocal()
+    try:
+        yield session
+        session.commit()
+    except Exception:
+        session.rollback()
+        raise
+    finally:
+        session.close()
+
+
+def get_db() -> Iterator[Session]:
+    session = SessionLocal()
+    try:
+        yield session
+        session.commit()
+    except Exception:
+        session.rollback()
+        raise
+    finally:
+        session.close()