Use Sina-only market K-lines and editable admin login synced to .env.

Market page uses Sina for quotes and bars with an auto-follow toggle and incremental chart updates while panning. Settings lets users change username and password, persisting to the database and .env.

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

kline_chart.py

@@ -268,7 +268,7 @@ def fetch_market_klines(
     force_remote: bool = False,
     *,
     trading_mode: Optional[str] = None,
-    prefer_ctp: bool = True,
+    prefer_ctp: bool = False,
 ) -> dict:
     chart_sym = ths_to_sina_chart_symbol(symbol)
     p = (period or "15m").lower()
@@ -303,11 +303,7 @@ def fetch_market_klines(
         except Exception as exc:
             logger.debug("ctp kline fetch failed %s %s: %s", symbol, p, exc)
 
-    need_sina = (
-        force_remote
-        or not ctp_bars
-        or len(ctp_bars) < MIN_CTP_KLINE_BARS
-    )
+    need_sina = force_remote or not prefer_ctp or not ctp_bars or len(ctp_bars) < MIN_CTP_KLINE_BARS
 
     if ctp_bars and len(ctp_bars) >= MIN_CTP_KLINE_BARS:
         bars = ctp_bars
@@ -325,10 +321,10 @@ def fetch_market_klines(
         except Exception as exc:
             logger.warning("kline cache read failed %s %s: %s", chart_sym, p, exc)
 
-    if not bars or len(ctp_bars) < MIN_CTP_KLINE_BARS:
+    if not bars or len(ctp_bars) < MIN_CTP_KLINE_BARS or not prefer_ctp:
         remote_bars = fetch_sina_klines(symbol, p)
         if remote_bars:
-            if ctp_bars and ctp_connected:
+            if prefer_ctp and ctp_bars and ctp_connected:
                 bars = _merge_kline_bars(remote_bars, ctp_bars)
                 source = "ctp+remote"
             else: