feat(frontend): 添加交易看板，统一时区为CST

refactor(db): 移除所有SQLite相关代码，迁移至MySQL

api/main.py

@@ -0,0 +1,191 @@
+"""
+FastAPI 主应用 - 交易看板 API
+"""
+import os
+import sys
+from datetime import datetime
+from typing import Optional
+from zoneinfo import ZoneInfo
+
+from fastapi import FastAPI, Query, HTTPException
+from fastapi.staticfiles import StaticFiles
+from fastapi.responses import FileResponse
+from fastapi.middleware.cors import CORSMiddleware
+
+# 添加项目路径
+sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
+
+from api.models import TradeModel, PredictionModel
+from api.prediction_service import get_prediction_service
+
+# 创建 FastAPI 应用
+app = FastAPI(
+    title="Crypto Predictor Dashboard API",
+    description="BTC 预测交易看板 API",
+    version="1.0.0"
+)
+
+# 启用 CORS
+app.add_middleware(
+    CORSMiddleware,
+    allow_origins=["*"],
+    allow_credentials=True,
+    allow_methods=["*"],
+    allow_headers=["*"],
+)
+
+# 静态文件目录
+STATIC_DIR = os.path.join(os.path.dirname(os.path.abspath(__file__)), 'static')
+
+# 挂载静态文件
+app.mount("/static", StaticFiles(directory=STATIC_DIR), name="static")
+
+
+# ==================== 页面路由 ====================
+
+@app.get("/")
+async def index():
+    """返回主页"""
+    return FileResponse(os.path.join(STATIC_DIR, 'index.html'))
+
+
+# ==================== 交易 API ====================
+
+@app.get("/api/trades/current")
+async def get_current_trade():
+    """获取当前/最新交易"""
+    try:
+        trade = TradeModel.get_current_trade()
+        if trade:
+            return {"success": True, "data": trade}
+        return {"success": True, "data": None, "message": "暂无交易记录"}
+    except Exception as e:
+        raise HTTPException(status_code=500, detail=str(e))
+
+
+@app.get("/api/trades/history")
+async def get_trade_history(
+    page: int = Query(1, ge=1, description="页码"),
+    limit: int = Query(10, ge=1, le=100, description="每页条数"),
+    month: Optional[str] = Query(None, description="月份筛选 (YYYY-MM)"),
+    day: Optional[str] = Query(None, description="日期筛选 (YYYY-MM-DD)")
+):
+    """获取历史交易记录"""
+    try:
+        result = TradeModel.get_history(page=page, limit=limit, month=month, day=day)
+        return {"success": True, **result}
+    except Exception as e:
+        raise HTTPException(status_code=500, detail=str(e))
+
+
+# ==================== 准确率 API ====================
+
+@app.get("/api/accuracy/current")
+async def get_current_prediction():
+    """获取当前小时的预测"""
+    try:
+        service = get_prediction_service()
+        prediction = service.predict_current_hour()
+        return {"success": True, "data": prediction}
+    except Exception as e:
+        raise HTTPException(status_code=500, detail=str(e))
+
+
+@app.get("/api/accuracy/monthly")
+async def get_monthly_accuracy(
+    month: Optional[str] = Query(None, description="月份 (YYYY-MM)，默认当月")
+):
+    """获取月度准确率统计"""
+    try:
+        # 默认当月
+        if not month:
+            et_tz = ZoneInfo('America/New_York')
+            month = datetime.now(et_tz).strftime('%Y-%m')
+        
+        # 确保有数据
+        service = get_prediction_service()
+        service.ensure_predictions_for_month(month)
+        
+        # 获取统计
+        stats = PredictionModel.get_monthly_stats(month)
+        
+        return {
+            "success": True,
+            "month": month,
+            "data": stats
+        }
+    except Exception as e:
+        raise HTTPException(status_code=500, detail=str(e))
+
+
+@app.get("/api/accuracy/daily")
+async def get_daily_accuracy(
+    month: Optional[str] = Query(None, description="月份 (YYYY-MM)，默认当月"),
+    page: int = Query(1, ge=1, description="页码"),
+    limit: int = Query(10, ge=1, le=100, description="每页条数")
+):
+    """获取每日准确率统计"""
+    try:
+        # 默认当月
+        if not month:
+            et_tz = ZoneInfo('America/New_York')
+            month = datetime.now(et_tz).strftime('%Y-%m')
+        
+        # 确保有数据
+        service = get_prediction_service()
+        service.ensure_predictions_for_month(month)
+        
+        # 获取统计
+        result = PredictionModel.get_daily_stats(month=month, page=page, limit=limit)
+        
+        return {
+            "success": True,
+            "month": month,
+            **result
+        }
+    except Exception as e:
+        raise HTTPException(status_code=500, detail=str(e))
+
+
+@app.get("/api/accuracy/hourly/{date}")
+async def get_hourly_accuracy(date: str):
+    """获取指定日期的每小时准确率详情"""
+    try:
+        # 确保有数据
+        service = get_prediction_service()
+        service.ensure_predictions_for_date(date)
+        
+        # 获取详情
+        details = PredictionModel.get_hourly_details(date)
+        
+        return {
+            "success": True,
+            "date": date,
+            "data": details
+        }
+    except Exception as e:
+        raise HTTPException(status_code=500, detail=str(e))
+
+
+# ==================== 状态 API ====================
+
+@app.get("/api/status")
+async def get_status():
+    """获取服务状态"""
+    et_tz = ZoneInfo('America/New_York')
+    now_et = datetime.now(et_tz)
+    
+    return {
+        "success": True,
+        "status": "running",
+        "server_time": datetime.now().isoformat(),
+        "server_time_et": now_et.isoformat(),
+        "version": "1.0.0"
+    }
+
+
+# ==================== 启动入口 ====================
+
+if __name__ == "__main__":
+    import uvicorn
+    uvicorn.run(app, host="0.0.0.0", port=8000)