Support selectable demo exchanges and configurable analysis limits

Persist manual requests until exchange confirmation, preserve stop protection, and reconcile fills before settling plans. Tighten model stream, crawler, skill, research accounting, and frontend race handling, with regression coverage. Keep queued analyses pending until a fresh account snapshot is available.

backend/src/alphapulse/models/__init__.py

@@ -2,7 +2,7 @@ from alphapulse.core.db import Base
 from alphapulse.models.ai import AiProvider, ChatMessage, ChatSession, ContextVersion, SkillNode, SkillVersion
 from alphapulse.models.market import Kline, KlineSyncState, MarketSymbol
 from alphapulse.models.news import CrawlLog, CrawlRun, NewsItem, NewsRevision, RawBody, RawResponse, Source
-from alphapulse.models.trading import NewsSignal, TradingAccount, TradingAnalysis, TradingEvent, TradingFill, TradingOrder, TradingSymbol
+from alphapulse.models.trading import NewsSignal, TradingAccount, TradingAnalysis, TradingCredential, TradingEvent, TradingFill, TradingOrder, TradingSymbol
 
 __all__ = [
     "AiProvider",
@@ -25,6 +25,7 @@ __all__ = [
     "Source",
     "TradingAccount",
     "TradingAnalysis",
+    "TradingCredential",
     "TradingEvent",
     "TradingFill",
     "TradingOrder",

backend/src/alphapulse/models/trading.py

@@ -9,18 +9,29 @@ from alphapulse.core.db import Base
 
 
 class TradingAccount(Base):
-    """币安模拟盘账户：单行（id=1）。key 只以密文存储；启停和交易资金按币种设置，见 TradingSymbol"""
+    """模拟盘全局设置：单行（id=1），凭证按交易所单独保存"""
 
     __tablename__ = "trading_account"
     __table_args__ = (CheckConstraint("id = 1", name="trading_account_single_row"),)
 
     id: Mapped[int] = mapped_column(primary_key=True, default=1)
-    api_key_encrypted: Mapped[bytes | None] = mapped_column(LargeBinary)
-    api_secret_encrypted: Mapped[bytes | None] = mapped_column(LargeBinary)
-    api_key_hint: Mapped[str | None] = mapped_column(String(8))
+    exchange: Mapped[str] = mapped_column(String(16), default="binance", server_default="binance")
     # 交易分析用的模型配置；为空时用默认配置
     provider_id: Mapped[int | None] = mapped_column(ForeignKey("ai_providers.id", ondelete="SET NULL"))
     reasoning_effort: Mapped[str | None] = mapped_column(String(8))
+    daily_analysis_limit: Mapped[int] = mapped_column(Integer, default=60, server_default="60")
+    updated_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), server_default=func.now(), onupdate=func.now())
+
+
+class TradingCredential(Base):
+    """每家模拟盘独立保存凭证，切换交易所不覆盖另一家的 key"""
+
+    __tablename__ = "trading_credentials"
+
+    exchange: Mapped[str] = mapped_column(String(16), primary_key=True)
+    api_key_encrypted: Mapped[bytes | None] = mapped_column(LargeBinary)
+    api_secret_encrypted: Mapped[bytes | None] = mapped_column(LargeBinary)
+    api_key_hint: Mapped[str | None] = mapped_column(String(8))
     updated_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), server_default=func.now(), onupdate=func.now())
 
 
@@ -43,6 +54,8 @@ class TradingAnalysis(Base):
     """一次模型分析；action=plan 的行同时是一个交易计划，plan_* 等字段记录其生命周期"""
 
     __tablename__ = "trading_analyses"
+    exchange: Mapped[str] = mapped_column(String(16), index=True, default="binance", server_default="binance")
+
     __table_args__ = (Index("ix_trading_analyses_symbol_started", "symbol", "started_at"),)
 
     id: Mapped[int] = mapped_column(primary_key=True)
@@ -84,6 +97,8 @@ class TradingOrder(Base):
 
     __tablename__ = "trading_orders"
 
+    exchange: Mapped[str] = mapped_column(String(16), index=True, default="binance", server_default="binance")
+
     id: Mapped[int] = mapped_column(primary_key=True)
     analysis_id: Mapped[int | None] = mapped_column(ForeignKey("trading_analyses.id"), index=True)
     symbol: Mapped[str] = mapped_column(String(32), index=True)
@@ -102,7 +117,7 @@ class TradingOrder(Base):
     # submitting / new / partially_filled / filled / canceled / expired / rejected / finished / failed
     status: Mapped[str] = mapped_column(String(16), default="submitting")
     # orderId 或 algoId
-    exchange_id: Mapped[str | None] = mapped_column(String(32))
+    exchange_id: Mapped[str | None] = mapped_column(String(64))
     filled_qty: Mapped[Decimal] = mapped_column(Numeric, default=0)
     avg_price: Mapped[Decimal | None] = mapped_column(Numeric)
     error: Mapped[str | None] = mapped_column(Text)
@@ -114,6 +129,8 @@ class TradingEvent(Base):
     """只追加的时间线"""
 
     __tablename__ = "trading_events"
+    exchange: Mapped[str] = mapped_column(String(16), index=True, default="binance", server_default="binance")
+
     __table_args__ = (Index("ix_trading_events_symbol_id", "symbol", "id"),)
 
     id: Mapped[int] = mapped_column(BigInteger, primary_key=True)
@@ -129,14 +146,16 @@ class TradingEvent(Base):
 
 
 class TradingFill(Base):
-    """币安成交记录（userTrades），历史仓位由它还原；包括程序外的手动成交。trade id 只在单个 symbol 内唯一"""
+    """模拟盘成交记录，历史仓位由它还原；包括手动成交，按交易所和币种隔离 ID"""
 
     __tablename__ = "trading_fills"
+    exchange: Mapped[str] = mapped_column(String(16), primary_key=True, default="binance", server_default="binance")
+
     __table_args__ = (Index("ix_trading_fills_symbol_time", "symbol", "time"),)
 
     symbol: Mapped[str] = mapped_column(String(32), primary_key=True)
-    trade_id: Mapped[int] = mapped_column(BigInteger, primary_key=True)
-    order_id: Mapped[int] = mapped_column(BigInteger)
+    trade_id: Mapped[str] = mapped_column(String(64), primary_key=True)
+    order_id: Mapped[str] = mapped_column(String(64))
     # BUY / SELL；账户为单向持仓，买为正、卖为负即可还原仓位
     side: Mapped[str] = mapped_column(String(4))
     price: Mapped[Decimal] = mapped_column(Numeric)