修复数据采集和清理的bug，新增持仓排名功能，日线数据分页

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

ft-app/app/routers/contracts.py

@@ -1,13 +1,15 @@
+import math
 from datetime import date, timedelta
-from fastapi import APIRouter, Depends, Request
+from fastapi import APIRouter, Depends, Request, Query
 from fastapi.responses import HTMLResponse
 from sqlalchemy.orm import Session
 from app.database import get_db
-from app.models import DailyBar, Contract
+from app.models import DailyBar, Contract, PositionRanking
 
 router = APIRouter(prefix="/contracts", tags=["contracts"])
 
 WEEKDAY_ZH = {0: "周一", 1: "周二", 2: "周三", 3: "周四", 4: "周五", 5: "周六", 6: "周日"}
+PAGE_SIZE = 7
 
 
 def get_active_contracts(db: Session) -> list[str]:
@@ -47,7 +49,13 @@ def contract_index(request: Request, db: Session = Depends(get_db)):
 
 
 @router.get("/{contract}", response_class=HTMLResponse)
-def contract_detail(request: Request, contract: str, db: Session = Depends(get_db)):
+def contract_detail(
+    request: Request,
+    contract: str,
+    pos_date: str | None = None,
+    page: int = Query(1, ge=1),
+    db: Session = Depends(get_db),
+):
     active_contracts = get_active_contracts(db)
     bars = (
         db.query(DailyBar)
@@ -56,9 +64,17 @@ def contract_detail(request: Request, contract: str, db: Session = Depends(get_d
         .all()
     )
 
+    total = len(bars)
+    total_pages = max(1, math.ceil(total / PAGE_SIZE))
+    page = min(page, total_pages)
+    start = (page - 1) * PAGE_SIZE
+    page_bars = bars[start:start + PAGE_SIZE]
+
     rows = []
-    for bar in bars:
+    for i, bar in enumerate(page_bars):
+        global_idx = start + i
         rows.append({
+            "global_idx": global_idx,
             "date": bar.date.strftime("%Y/%-m/%-d"),
             "weekday": WEEKDAY_ZH.get(bar.date.weekday(), ""),
             "open": int(bar.open) if bar.open else "-",
@@ -72,6 +88,45 @@ def contract_detail(request: Request, contract: str, db: Session = Depends(get_d
 
     latest = bars[0] if bars else None
 
+    # Dates that have position data (for date picker)
+    pos_dates = [
+        r[0] for r in
+        db.query(PositionRanking.date)
+        .filter(PositionRanking.contract_code == contract.upper())
+        .distinct()
+        .order_by(PositionRanking.date.desc())
+        .all()
+    ]
+
+    # Determine which date to show position rankings for
+    if pos_date:
+        try:
+            selected_date = date.fromisoformat(pos_date)
+        except ValueError:
+            selected_date = pos_dates[0] if pos_dates else None
+    else:
+        selected_date = pos_dates[0] if pos_dates else None
+
+    # Position rankings for the selected date
+    pos_data = {"volume": [], "long": [], "short": []}
+    if selected_date:
+        rankings = (
+            db.query(PositionRanking)
+            .filter(
+                PositionRanking.contract_code == contract.upper(),
+                PositionRanking.date == selected_date,
+            )
+            .order_by(PositionRanking.data_type, PositionRanking.rank)
+            .all()
+        )
+        for r in rankings:
+            pos_data[r.data_type].append({
+                "rank": r.rank,
+                "institution": r.institution,
+                "value": r.value,
+                "change": r.change,
+            })
+
     # Predict next trading day amplitude: mean of latest 5 diffs
     # Compute next trading date
     next_date = latest.date + timedelta(days=1) if latest else None
@@ -91,9 +146,17 @@ def contract_detail(request: Request, contract: str, db: Session = Depends(get_d
             contracts=active_contracts,
             rows=rows,
             latest=latest,
+            pos_dates=pos_dates,
+            selected_pos_date=selected_date,
+            pos_data=pos_data,
             next_amp=next_amp,
             next_date=next_date.strftime("%Y/%-m/%-d") if next_date else None,
             next_weekday=WEEKDAY_ZH.get(next_date.weekday(), "") if next_date else "",
             row_count=len(rows),
+            total_rows=total,
+            page=page,
+            total_pages=total_pages,
+            pos_date=pos_date or "",
+            WEEKDAY_ZH=WEEKDAY_ZH,
         )
     )