同步进度增加详细天数反馈，优化日期范围避免重复请求无数据的历史日期

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

ft-app/app/collector.py

@@ -52,6 +52,7 @@ def sync_contract_bars_bg(contract_code: str) -> bool:
             with _lock:
                 _progress["total"] = len(bars)
 
+            total_bars = len(bars)
             inserted = 0
             min_date = None
             for i, bar in enumerate(bars):
@@ -71,6 +72,7 @@ def sync_contract_bars_bg(contract_code: str) -> bool:
                         min_date = bar["date"]
                 with _lock:
                     _progress["done"] = i + 1
+                    _progress["label"] = f"同步行情 {code} · {i + 1}/{total_bars} 条"
 
             if inserted > 0:
                 db.flush()
@@ -102,10 +104,19 @@ def sync_positions_bg(contract_code: str) -> bool:
                 .filter(DailyBar.contract == code)
                 .order_by(DailyBar.date).all()
             ]
-            missing = [d for d in bar_dates if d not in existing_dates]
+            # Only sync dates within or after existing position date range;
+            # akshare may not have data for very old dates
+            if existing_dates:
+                min_pos = min(existing_dates)
+                missing = [d for d in bar_dates if d not in existing_dates and d >= min_pos]
+            else:
+                missing = [d for d in bar_dates if d not in existing_dates]
+            total_missing = len(missing)
 
             with _lock:
-                _progress["total"] = len(missing)
+                _progress["total"] = total_missing
+                if total_missing == 0:
+                    _progress["label"] = f"同步持仓 {code} · 已是最新"
 
             inserted = 0
             for i, d in enumerate(missing):
@@ -120,8 +131,7 @@ def sync_positions_bg(contract_code: str) -> bool:
                 db.flush()
                 with _lock:
                     _progress["done"] = i + 1
-
-            db.commit()
+                    _progress["label"] = f"同步持仓 {code} · {i + 1}/{total_missing} 天"
         finally:
             db.close()