Add stats trading calendar and fix CTP position avg/sync.

Calendar shows daily closed trade count and PnL with emotion-day highlighting; day click loads review-first trade list. Use exchange-only entry average and improve vnpy position sync after CTP reconnect.

app.py

@@ -13,7 +13,7 @@ import sqlite3
 import time
 import threading
 import requests
-from datetime import datetime, timedelta
+from datetime import date, datetime, timedelta
 from typing import Optional
 from functools import wraps
 from zoneinfo import ZoneInfo
@@ -45,7 +45,14 @@ from fee_specs import (
     purge_non_ctp_fee_rates,
 )
 from nav_settings import NAV_TOGGLES, get_nav_items, nav_enabled, save_nav_items
-from stats_engine import STATS_VIEWS, build_all_stats, load_stats_cache, refresh_stats_cache
+from stats_engine import (
+    STATS_VIEWS,
+    build_all_stats,
+    get_calendar_day,
+    get_calendar_month,
+    load_stats_cache,
+    refresh_stats_cache,
+)
 from kline_store import ensure_kline_tables
 from kline_stream import kline_hub, sse_format
 from kline_chart import generate_review_kline_chart, fetch_market_klines, MARKET_PERIODS
@@ -1635,6 +1642,40 @@ def api_stats_refresh():
     return jsonify(data)
 
 
+@app.route("/api/stats/calendar")
+@login_required
+def api_stats_calendar():
+    now = datetime.now(TZ)
+    year = request.args.get("year", type=int) or now.year
+    month = request.args.get("month", type=int) or now.month
+    if month < 1 or month > 12:
+        return jsonify({"error": "invalid month"}), 400
+    conn = get_db()
+    try:
+        data = get_calendar_month(conn, year, month)
+    finally:
+        conn.close()
+    return jsonify(data)
+
+
+@app.route("/api/stats/calendar/day")
+@login_required
+def api_stats_calendar_day():
+    day = (request.args.get("date") or "").strip()
+    if not day:
+        return jsonify({"error": "date required"}), 400
+    try:
+        date.fromisoformat(day)
+    except ValueError:
+        return jsonify({"error": "invalid date"}), 400
+    conn = get_db()
+    try:
+        data = get_calendar_day(conn, day)
+    finally:
+        conn.close()
+    return jsonify(data)
+
+
 _dashboard_sync_tick = {"n": 0}