行情K线：分类主力选择、图表指标与布局稳定

Co-authored-by: Cursor <cursoragent@cursor.com>

app.py

@@ -17,7 +17,7 @@ from flask import (
 )
 from werkzeug.security import check_password_hash, generate_password_hash
 
-from symbols import search_symbols, ths_to_codes
+from symbols import search_symbols, ths_to_codes, list_main_contracts_grouped
 from contract_specs import calc_position_metrics
 from fee_specs import (
     calc_fee_breakdown,
@@ -381,10 +381,17 @@ def build_market_quote_payload(
     codes = ths_to_codes(symbol)
     if codes:
         name = codes.get("name", symbol)
+    prev_close = None
+    if sina_code:
+        from market import fetch_raw_for_volume
+        raw = fetch_raw_for_volume(sina_code)
+        if raw and raw.get("prev_close") is not None:
+            prev_close = raw["prev_close"]
     return {
         "symbol": symbol,
         "name": name,
         "price": price,
+        "prev_close": prev_close,
     }
 
 
@@ -639,6 +646,12 @@ def api_symbol_search():
     return jsonify(search_symbols(q))
 
 
+@app.route("/api/symbols/mains")
+@login_required
+def api_symbols_mains():
+    return jsonify(list_main_contracts_grouped())
+
+
 @app.route("/api/key_prices")
 @login_required
 def api_key_prices():