fix(HEL-488): 盘中日K补上今天实时变化的一根

悬浮窗和详情页在 Tushare rt_k / iFinD 不可用时，改用免费实时行情或当日分时生成今日K，收盘后正式日K就绪再无缝替换。

Co-authored-by: Cursor <cursoragent@cursor.com>
Co-authored-by: multica-agent <github@multica.ai>

backend/data/realtime.py

@@ -19,6 +19,8 @@ class RealtimeAggregateError(RuntimeError):
 
 
 EASTMONEY_INDEX_URL = "https://push2.eastmoney.com/api/qt/ulist.np/get"
+EASTMONEY_STOCK_URL = "https://push2.eastmoney.com/api/qt/stock/get"
+EASTMONEY_STOCK_FIELDS = "f43,f44,f45,f46,f47,f48,f57,f58,f60,f86,f168"
 EASTMONEY_SECTOR_URL = "https://push2.eastmoney.com/api/qt/clist/get"
 EASTMONEY_A_SHARE_BOARDS = (
     "m:0+t:6",
@@ -283,6 +285,42 @@ class WebRealtimeAggregator:
             )
         return self._filter_quotes_by_date(quotes, expected_date)
 
+    def tencent_stock_quote(self, code: str, expected_date: str = "") -> dict[str, Any]:
+        symbol, _secid, ts_code = _a_share_identity(code)
+        raw, _cache_age = self._get_text(
+            f"{TENCENT_QUOTE_URL}{symbol}",
+            referer="https://gu.qq.com/",
+            encoding="gb18030",
+        )
+        quote = next(
+            (
+                item
+                for line in raw.splitlines()
+                if (item := _parse_tencent_stock_quote(line))
+            ),
+            None,
+        )
+        if not quote:
+            raise RealtimeAggregateError(f"Tencent stock quote unavailable for {ts_code}")
+        return _require_quote_date(quote, expected_date)
+
+    def eastmoney_stock_quote(self, code: str, expected_date: str = "") -> dict[str, Any]:
+        _symbol, secid, ts_code = _a_share_identity(code)
+        payload = self._get_json(
+            EASTMONEY_STOCK_URL,
+            {
+                "secid": secid,
+                "invt": "2",
+                "fltt": "2",
+                "fields": EASTMONEY_STOCK_FIELDS,
+            },
+            referer="https://quote.eastmoney.com/",
+        )
+        quote = _normalize_eastmoney_stock_quote(payload.get("data") or {}, ts_code)
+        if not quote:
+            raise RealtimeAggregateError(f"Eastmoney stock quote unavailable for {ts_code}")
+        return _require_quote_date(quote, expected_date)
+
     def tencent_indices(self) -> list[dict[str, Any]]:
         raw, cache_age = self._get_text(
             TENCENT_INDEX_URL,
@@ -553,6 +591,55 @@ def _diff_rows(data: dict[str, Any]) -> list[dict[str, Any]]:
     return [row for row in diff if isinstance(row, dict)]
 
 
+def _a_share_identity(code: str) -> tuple[str, str, str]:
+    raw = str(code or "").strip().upper()
+    symbol = raw.split(".")[0]
+    if not symbol.isdigit() or len(symbol) != 6:
+        raise RealtimeAggregateError("Invalid stock code")
+    if raw.endswith(".SH") or symbol.startswith(("5", "6", "9")):
+        return f"sh{symbol}", f"1.{symbol}", f"{symbol}.SH"
+    if raw.endswith(".BJ") or symbol.startswith(("4", "8")):
+        return f"bj{symbol}", f"0.{symbol}", f"{symbol}.BJ"
+    return f"sz{symbol}", f"0.{symbol}", f"{symbol}.SZ"
+
+
+def _require_quote_date(quote: dict[str, Any], expected_date: str) -> dict[str, Any]:
+    want = str(expected_date or "").replace("-", "")
+    got = str(quote.get("quote_date") or "")
+    if want and got != want:
+        raise RealtimeAggregateError(f"quote date {got or 'empty'} is not {want}")
+    return quote
+
+
+def _normalize_eastmoney_stock_quote(
+    row: dict[str, Any], ts_code: str
+) -> dict[str, Any] | None:
+    close = _number(row.get("f43"))
+    previous_close = _number(row.get("f60"))
+    if close <= 0 or previous_close <= 0:
+        return None
+    epoch = int(_number(row.get("f86")))
+    quote_date = ""
+    if epoch > 0:
+        quote_date = datetime.fromtimestamp(epoch).astimezone().strftime("%Y%m%d")
+    return {
+        "ts_code": ts_code,
+        "name": row.get("f58") or ts_code.split(".")[0],
+        "pre_close": previous_close,
+        "open": _number(row.get("f46")),
+        "high": _number(row.get("f44")),
+        "low": _number(row.get("f45")),
+        "close": close,
+        "vol": _number(row.get("f47")) * 100,
+        "amount": _number(row.get("f48")),
+        "num": 0,
+        "quote_date": quote_date,
+        "quote_time_epoch": epoch,
+        "turnover_rate": _number(row.get("f168")),
+        "source": "eastmoney_stock",
+    }
+
+
 def _parse_tencent_stock_quote(line: str) -> dict[str, Any] | None:
     if '="' not in line:
         return None

backend/features/market/service.py

@@ -15,6 +15,7 @@ from backend.bootstrap.config import (
 )
 from backend.data.providers.ifind_client import IfindError
 from backend.data.providers.tushare_client import TushareClient, TushareError
+from backend.data.realtime import RealtimeAggregateError
 from backend.features.market.backfill_history import (
     DEFAULT_RECENT_TRADING_DAYS,
     MAX_RANGE_TRADING_DAYS,
@@ -42,6 +43,7 @@ SEARCH_TYPE_LABELS = {
     "theme": "题材",
     "index": "指数",
 }
+TODAY_DAILY_UNAVAILABLE_NOTICE = "今日日K暂不可用，仍显示最近收盘K线。"
 THS_SEARCH_TYPES = {
     "I": ("sector", "行业板块"),
     "R": ("sector", "地域板块"),
@@ -814,26 +816,27 @@ class MarketServiceMixin:
                 "trade_date": f"{actual_date[:4]}-{actual_date[4:6]}-{actual_date[6:]}",
             }
         today = now.strftime("%Y%m%d")
+        latest_bar = (result.get("prices") or [{}])[-1] if result.get("prices") else {}
+        official_today = (
+            actual_date == today and not bool(latest_bar.get("realtime"))
+        )
+        after_close = now.time().replace(tzinfo=None) >= dt_time(15, 0)
         should_merge = (
             requested_date == today
             and actual_date <= today
             and now.weekday() < 5
             and now.time().replace(tzinfo=None) >= dt_time(9, 30)
+            and not (official_today and after_close)
         )
         if should_merge:
-            quote = self._ifind_realtime_stock_quote(code)
+            quote = self._resolve_today_daily_quote(code, today, result)
             if quote and self._valid_realtime_stock_quote(quote, today):
                 self._merge_realtime_stock_detail(result, quote, requested_date)
-            elif self.configured and actual_date < today:
-                client = self._tushare_client()
-                try:
-                    resolved_date, _ = client.resolve_trade_context(requested_date)
-                    if resolved_date == today:
-                        quote = client.realtime_stock_quote(tushare_code(code), requested_date)
-                        if self._valid_realtime_stock_quote(quote, today):
-                            self._merge_realtime_stock_detail(result, quote, requested_date)
-                except TushareError:
-                    pass
+            elif actual_date < today:
+                result["meta"] = {
+                    **(result.get("meta") or {}),
+                    "notice": TODAY_DAILY_UNAVAILABLE_NOTICE,
+                }
         return self._enrich_stock_detail(result)
 
     @staticmethod
@@ -948,6 +951,134 @@ class MarketServiceMixin:
             "quote_time": str(row.get("time") or ""),
         }
 
+    def _resolve_today_daily_quote(
+        self, code: str, today: str, payload: dict[str, Any]
+    ) -> dict[str, Any] | None:
+        quote = self._ifind_realtime_stock_quote(code)
+        if quote and self._valid_realtime_stock_quote(quote, today):
+            return quote
+        if self.configured:
+            try:
+                client = self._tushare_client()
+                resolve = getattr(client, "resolve_trade_context", None)
+                resolved = today
+                if callable(resolve):
+                    resolved, _ = resolve(today)
+                if str(resolved or "") == today:
+                    quote = client.realtime_stock_quote(tushare_code(code), today)
+                    if self._valid_realtime_stock_quote(quote, today):
+                        return quote
+            except TushareError:
+                pass
+        quote = self._free_realtime_stock_quote(code, today)
+        if quote and self._valid_realtime_stock_quote(quote, today):
+            return quote
+        return self._intraday_realtime_stock_quote(code, today, payload)
+
+    def _free_realtime_stock_quote(self, code: str, today: str) -> dict[str, Any] | None:
+        aggregator = getattr(self, "realtime_aggregator", None)
+        if aggregator is None:
+            return None
+        ts_code = tushare_code(code)
+        for loader in (
+            getattr(aggregator, "tencent_stock_quote", None),
+            getattr(aggregator, "eastmoney_stock_quote", None),
+        ):
+            if not callable(loader):
+                continue
+            try:
+                row = loader(ts_code, expected_date=today)
+            except (RealtimeAggregateError, Exception):
+                continue
+            quote = self._quote_from_free_row(code, today, row)
+            if quote:
+                return quote
+        return None
+
+    def _quote_from_free_row(
+        self, code: str, today: str, row: dict[str, Any]
+    ) -> dict[str, Any] | None:
+        price = float(row.get("close") or 0)
+        previous_close = float(row.get("pre_close") or 0)
+        if price <= 0 or previous_close <= 0:
+            return None
+        try:
+            name, sector = self._stock_identity(code, today)
+        except Exception:
+            name, sector = "--", "其他"
+        epoch = int(row.get("quote_time_epoch") or 0)
+        if epoch > 0:
+            quote_time = datetime.fromtimestamp(epoch).astimezone().isoformat(timespec="seconds")
+        else:
+            quote_date = str(row.get("quote_date") or today)
+            quote_time = f"{quote_date[:4]}-{quote_date[4:6]}-{quote_date[6:]}"
+        return {
+            "name": str(row.get("name") or name or "--"),
+            "sector": sector,
+            "price": price,
+            "open": float(row.get("open") or 0),
+            "high": float(row.get("high") or 0),
+            "low": float(row.get("low") or 0),
+            "change": round((price / previous_close - 1) * 100, 4),
+            "volume": float(row.get("vol") or 0),
+            "amount_billion": float(row.get("amount") or 0) / 100_000_000,
+            "turnover_rate": float(row.get("turnover_rate") or 0),
+            "quote_time": quote_time,
+        }
+
+    def _intraday_realtime_stock_quote(
+        self, code: str, today: str, payload: dict[str, Any]
+    ) -> dict[str, Any] | None:
+        chart_data = getattr(self, "chart_data", None)
+        if chart_data is None:
+            return None
+        try:
+            chart = chart_data.stock_intraday(code)
+        except (AttributeError, ChartDataError, Exception):
+            return None
+        points = [
+            point
+            for point in list(chart.get("points") or [])
+            if str(point.get("date") or "").replace("-", "") == today
+        ]
+        if not points:
+            return None
+        opens = [float(point.get("open") or 0) for point in points if float(point.get("open") or 0) > 0]
+        highs = [float(point.get("high") or 0) for point in points if float(point.get("high") or 0) > 0]
+        lows = [float(point.get("low") or 0) for point in points if float(point.get("low") or 0) > 0]
+        closes = [float(point.get("close") or 0) for point in points if float(point.get("close") or 0) > 0]
+        if not opens or not highs or not lows or not closes:
+            return None
+        price = closes[-1]
+        previous_close = float(chart.get("previous_close") or 0)
+        if previous_close <= 0:
+            history = list(payload.get("prices") or [])
+            previous_close = float((history[-1] if history else {}).get("close") or 0)
+        if previous_close <= 0:
+            return None
+        volume = sum(float(point.get("volume") or 0) for point in points)
+        amount = sum(float(point.get("amount") or 0) for point in points)
+        if volume <= 0 and amount <= 0:
+            return None
+        try:
+            name, sector = self._stock_identity(code, today)
+        except Exception:
+            name, sector = "--", "其他"
+        return {
+            "name": name,
+            "sector": sector,
+            "price": price,
+            "open": opens[0],
+            "high": max(highs),
+            "low": min(lows),
+            "change": round((price / previous_close - 1) * 100, 4),
+            "volume": volume,
+            "volume_unit": "lots",
+            "amount_billion": amount / 100_000_000,
+            "turnover_rate": 0.0,
+            "quote_time": str(points[-1].get("date") or today),
+        }
+
     @staticmethod
     def _merge_realtime_stock_detail(
         payload: dict[str, Any], quote: dict[str, Any], trade_date: str
@@ -986,6 +1117,7 @@ class MarketServiceMixin:
             **(payload.get("meta") or {}),
             "trade_date": display_date,
             "realtime": True,
+            "notice": "",
             "updated_at": datetime.now().astimezone().isoformat(timespec="seconds"),
         }
 

config/architecture-inventory.json

@@ -533,8 +533,8 @@
     },
     {
       "path": "frontend/pages/market/preview.js",
-      "bytes": 18178,
-      "lines": 446
+      "bytes": 18339,
+      "lines": 450
     },
     {
       "path": "backend/features/heaven/trend.py",
@@ -681,16 +681,16 @@
       "bytes": 6092,
       "lines": 138
     },
+    {
+      "path": "frontend/pages/market/stock-detail.js",
+      "bytes": 6041,
+      "lines": 134
+    },
     {
       "path": "frontend/pages/dragon-tiger/page.html",
       "bytes": 5754,
       "lines": 85
     },
-    {
-      "path": "frontend/pages/market/stock-detail.js",
-      "bytes": 5690,
-      "lines": 124
-    },
     {
       "path": "frontend/pages.config.js",
       "bytes": 5385,

frontend/pages/market/preview.js

@@ -367,7 +367,11 @@ function selectStockPreviewChart(chart) {
     }
   } else if ((payload.prices || []).length) {
     setText("stockPreviewDate", payload.meta?.trade_date || "最新行情");
-    setText("stockPreviewSource", `日 K 行情 · ${payload.prices.length} 个交易日`);
+    const notice = String(payload.meta?.notice || "").trim();
+    setText(
+      "stockPreviewSource",
+      notice ? `日 K 行情 · ${payload.prices.length} 个交易日 · ${notice}` : `日 K 行情 · ${payload.prices.length} 个交易日`,
+    );
     drawDailyPreviewChart(payload.prices);
   } else {
     setText("stockPreviewDate", payload.meta?.trade_date || "最新行情");

frontend/pages/market/stock-detail.js

@@ -52,7 +52,11 @@ async function openStock(code, fallback = null) {
     renderStockNotes(payload.notes || []);
     updateWatchButton();
     if (state.stockDetailChartMode === "daily") {
-      setText("chartSource", `日 K 行情 · ${payload.prices.length} 个交易日`);
+      const notice = String(payload.meta?.notice || "").trim();
+      setText(
+        "chartSource",
+        notice ? `日 K 行情 · ${payload.prices.length} 个交易日 · ${notice}` : `日 K 行情 · ${payload.prices.length} 个交易日`,
+      );
       requestAnimationFrame(() => drawPriceChart(payload.prices || []));
     }
   } catch (error) {
@@ -69,7 +73,13 @@ async function selectStockDetailChart(mode) {
   syncDetailChartButtons("stock", selected);
   if (selected === "daily") {
     const prices = state.stockDetail?.prices || [];
-    setText("chartSource", prices.length ? `日 K 行情 · ${prices.length} 个交易日` : "正在加载行情");
+    const notice = String(state.stockDetail?.meta?.notice || "").trim();
+    setText(
+      "chartSource",
+      prices.length
+        ? (notice ? `日 K 行情 · ${prices.length} 个交易日 · ${notice}` : `日 K 行情 · ${prices.length} 个交易日`)
+        : "正在加载行情",
+    );
     if (prices.length) requestAnimationFrame(() => drawPriceChart(prices));
     else clearPriceChart("正在加载日 K 数据");
     return;

tests/test_heaven_realtime.py

@@ -6,7 +6,7 @@ import unittest
 from datetime import datetime
 from unittest.mock import MagicMock, patch
 
-from backend.data.realtime import WebRealtimeAggregator
+from backend.data.realtime import RealtimeAggregateError, WebRealtimeAggregator
 from backend.features.heaven.engine import _market_line_scores, build_manual_market_hexagram
 from server import DashboardService
 from backend.data.providers.tushare_client import (
@@ -415,6 +415,50 @@ class RealtimeAggregatorTests(unittest.TestCase):
         self.assertEqual(quotes[0]["vol"], 1000)
         self.assertEqual(quotes[0]["quote_date"], "20260720")
 
+    @patch.object(WebRealtimeAggregator, "_get_text")
+    def test_tencent_stock_quote_keeps_expected_date(self, get_text: MagicMock):
+        fields = [""] * 38
+        fields[1] = "浦发银行"
+        fields[2] = "600000"
+        fields[3] = "11.20"
+        fields[4] = "11.00"
+        fields[5] = "11.10"
+        fields[6] = "1234"
+        fields[30] = "20260720103000"
+        fields[33] = "11.30"
+        fields[34] = "11.00"
+        fields[37] = "1380"
+        get_text.return_value = (f'v_sh600000="{"~".join(fields)}";', 0)
+
+        quote = WebRealtimeAggregator().tencent_stock_quote("600000", "20260720")
+
+        self.assertEqual(quote["ts_code"], "600000.SH")
+        self.assertEqual(quote["quote_date"], "20260720")
+        self.assertEqual(quote["vol"], 123400)
+        self.assertAlmostEqual(quote["amount"], 13_800_000)
+
+    @patch.object(WebRealtimeAggregator, "_get_json")
+    def test_eastmoney_stock_quote_rejects_stale_date(self, get_json: MagicMock):
+        epoch = datetime(2026, 7, 19, 15, 0).timestamp()
+        get_json.return_value = {
+            "rc": 0,
+            "data": {
+                "f43": 11.2,
+                "f44": 11.3,
+                "f45": 11.0,
+                "f46": 11.1,
+                "f47": 10,
+                "f48": 50000000,
+                "f57": "300750",
+                "f58": "宁德时代",
+                "f60": 11.0,
+                "f86": epoch,
+            },
+        }
+
+        with self.assertRaises(RealtimeAggregateError):
+            WebRealtimeAggregator().eastmoney_stock_quote("300750.SZ", "20260720")
+
 
 if __name__ == "__main__":
     unittest.main()

tests/test_stock_detail_realtime.py

@@ -5,6 +5,10 @@ import unittest
 from datetime import datetime, timedelta
 from unittest.mock import patch
 
+from backend.data.providers.tushare_client import TushareError
+from backend.data.realtime import RealtimeAggregateError
+from backend.features.market.charts import ChartDataError
+from backend.features.market.service import TODAY_DAILY_UNAVAILABLE_NOTICE
 from server import DashboardService
 
 
@@ -17,6 +21,10 @@ class DetailDatabaseStub:
     def list_notes(user_id, code=""):
         return []
 
+    @staticmethod
+    def get_snapshot(trade_date):
+        return {}
+
 
 class RealtimeClientStub:
     quote_calls = 0
@@ -61,6 +69,122 @@ class FixedPreopenDatetime(datetime):
         return cls.fixed_now
 
 
+class FixedLunchDatetime(datetime):
+    fixed_now = datetime(2026, 7, 31, 11, 45).astimezone()
+
+    @classmethod
+    def now(cls, tz=None):
+        return cls.fixed_now
+
+
+class FixedAfterCloseDatetime(datetime):
+    fixed_now = datetime(2026, 7, 31, 15, 30).astimezone()
+
+    @classmethod
+    def now(cls, tz=None):
+        return cls.fixed_now
+
+
+class DeniedRealtimeClientStub:
+    quote_calls = 0
+
+    def __init__(self, token):
+        self.token = token
+
+    @staticmethod
+    def resolve_trade_context(requested_date):
+        return requested_date, requested_date
+
+    @classmethod
+    def realtime_stock_quote(cls, ts_code, reference_date=""):
+        cls.quote_calls += 1
+        raise TushareError("没有接口访问权限")
+
+
+class FreeQuoteAggregator:
+    def __init__(self, quote=None, fail=False):
+        self.quote = quote
+        self.fail = fail
+        self.tencent_calls = 0
+        self.eastmoney_calls = 0
+
+    def tencent_stock_quote(self, code, expected_date=""):
+        self.tencent_calls += 1
+        if self.fail:
+            raise RealtimeAggregateError("tencent down")
+        if self.quote and self.quote.get("source") == "eastmoney_stock":
+            raise RealtimeAggregateError("tencent empty")
+        if self.quote:
+            return self.quote
+        raise RealtimeAggregateError("tencent empty")
+
+    def eastmoney_stock_quote(self, code, expected_date=""):
+        self.eastmoney_calls += 1
+        if self.fail:
+            raise RealtimeAggregateError("eastmoney down")
+        if self.quote and self.quote.get("source") == "eastmoney_stock":
+            return self.quote
+        raise RealtimeAggregateError("eastmoney empty")
+
+
+class IntradayChartStub:
+    def __init__(self, points, previous_close=10.0, trade_date="2026-07-31"):
+        self.points = points
+        self.previous_close = previous_close
+        self.trade_date = trade_date
+
+    def stock_daily(self, code, end_date, limit=90):
+        raise ChartDataError("iFinD daily unavailable")
+
+    def stock_intraday(self, code):
+        return {
+            "trade_date": self.trade_date,
+            "previous_close": self.previous_close,
+            "points": self.points,
+        }
+
+
+def _history_payload(code="002141"):
+    yesterday = (FixedMarketDatetime.fixed_now - timedelta(days=1)).strftime("%Y-%m-%d")
+    return {
+        "meta": {"trade_date": yesterday, "source": "tushare"},
+        "stock": {"code": code, "name": "旧名称", "price": 10, "change": 7.1},
+        "prices": [
+            {
+                "trade_date": yesterday,
+                "open": 9.5,
+                "high": 10.1,
+                "low": 9.4,
+                "close": 10,
+                "change": 7.1,
+                "volume": 100,
+                "amount_billion": 1.1,
+            }
+        ],
+        "moneyflow": {},
+    }
+
+
+def _free_quote(source="tencent_qt", **overrides):
+    quote = {
+        "ts_code": "002141.SZ",
+        "name": "贤程科技",
+        "pre_close": 10.0,
+        "open": 10.2,
+        "high": 10.8,
+        "low": 10.1,
+        "close": 10.6,
+        "vol": 250000,
+        "amount": 26_500_000,
+        "quote_date": "20260731",
+        "quote_time_epoch": int(datetime(2026, 7, 31, 10, 31).timestamp()),
+        "source": source,
+        "turnover_rate": 2.5,
+    }
+    quote.update(overrides)
+    return quote
+
+
 class StockDetailRealtimeTests(unittest.TestCase):
     def setUp(self):
         self.service = DashboardService.__new__(DashboardService)
@@ -68,7 +192,11 @@ class StockDetailRealtimeTests(unittest.TestCase):
         self.service.database = DetailDatabaseStub()
         self.service._request_context = threading.local()
         self.service._request_context.user_id = 1
+        self.service.ifind = None
+        self.service.realtime_aggregator = None
+        self.service.chart_data = None
         RealtimeClientStub.quote_calls = 0
+        DeniedRealtimeClientStub.quote_calls = 0
 
     def test_today_detail_merges_rt_quote_without_mutating_daily_cache(self):
         today = FixedMarketDatetime.fixed_now.strftime("%Y%m%d")
@@ -162,6 +290,183 @@ class StockDetailRealtimeTests(unittest.TestCase):
         self.assertEqual(result["stock"]["change"], 1.2)
         self.assertEqual(RealtimeClientStub.quote_calls, 0)
 
+    def test_today_detail_falls_back_to_tencent_quote_when_rt_k_denied(self):
+        today = FixedMarketDatetime.fixed_now.strftime("%Y%m%d")
+        aggregator = FreeQuoteAggregator(_free_quote())
+        self.service.realtime_aggregator = aggregator
+        DeniedRealtimeClientStub.quote_calls = 0
+
+        with patch("backend.features.market.service.datetime", FixedMarketDatetime), patch(
+            "backend.features.market.service.TushareClient", DeniedRealtimeClientStub
+        ):
+            result = self.service._prepare_stock_detail(_history_payload(), "002141", today)
+
+        bar = result["prices"][-1]
+        self.assertEqual(bar["trade_date"], "2026-07-31")
+        self.assertTrue(bar["realtime"])
+        self.assertEqual(bar["open"], 10.2)
+        self.assertEqual(bar["high"], 10.8)
+        self.assertEqual(bar["low"], 10.1)
+        self.assertEqual(bar["close"], 10.6)
+        self.assertAlmostEqual(bar["change"], 6.0, places=4)
+        self.assertEqual(bar["volume"], 2500)
+        self.assertAlmostEqual(bar["amount_billion"], 0.265)
+        self.assertEqual(len(result["prices"]), 2)
+        self.assertEqual(result["meta"]["notice"], "")
+        self.assertEqual(aggregator.tencent_calls, 1)
+        self.assertEqual(DeniedRealtimeClientStub.quote_calls, 1)
+
+    def test_today_detail_falls_back_to_eastmoney_then_intraday(self):
+        today = FixedMarketDatetime.fixed_now.strftime("%Y%m%d")
+        aggregator = FreeQuoteAggregator(
+            _free_quote("eastmoney_stock", ts_code="600000.SH", name="浦发银行"),
+        )
+        self.service.realtime_aggregator = aggregator
+        DeniedRealtimeClientStub.quote_calls = 0
+
+        with patch("backend.features.market.service.datetime", FixedMarketDatetime), patch(
+            "backend.features.market.service.TushareClient", DeniedRealtimeClientStub
+        ):
+            result = self.service._prepare_stock_detail(_history_payload("600000"), "600000", today)
+
+        self.assertEqual(result["prices"][-1]["trade_date"], "2026-07-31")
+        self.assertEqual(result["prices"][-1]["close"], 10.6)
+        self.assertEqual(aggregator.tencent_calls, 1)
+        self.assertEqual(aggregator.eastmoney_calls, 1)
+
+        aggregator = FreeQuoteAggregator(fail=True)
+        self.service.realtime_aggregator = aggregator
+        self.service.chart_data = IntradayChartStub(
+            [
+                {
+                    "date": "2026-07-31",
+                    "time": "09:30",
+                    "open": 10.1,
+                    "high": 10.2,
+                    "low": 10.0,
+                    "close": 10.15,
+                    "volume": 120,
+                    "amount": 121800,
+                },
+                {
+                    "date": "2026-07-31",
+                    "time": "10:05",
+                    "open": 10.15,
+                    "high": 10.5,
+                    "low": 9.9,
+                    "close": 10.4,
+                    "volume": 80,
+                    "amount": 83200,
+                },
+            ]
+        )
+        with patch("backend.features.market.service.datetime", FixedMarketDatetime), patch(
+            "backend.features.market.service.TushareClient", DeniedRealtimeClientStub
+        ):
+            result = self.service._prepare_stock_detail(_history_payload("300750"), "300750", today)
+
+        bar = result["prices"][-1]
+        self.assertEqual(bar["trade_date"], "2026-07-31")
+        self.assertEqual(bar["open"], 10.1)
+        self.assertEqual(bar["high"], 10.5)
+        self.assertEqual(bar["low"], 9.9)
+        self.assertEqual(bar["close"], 10.4)
+        self.assertAlmostEqual(bar["change"], 4.0, places=4)
+        self.assertEqual(bar["volume"], 200)
+        self.assertTrue(bar["realtime"])
+
+    def test_today_detail_keeps_history_when_free_sources_fail(self):
+        today = FixedMarketDatetime.fixed_now.strftime("%Y%m%d")
+        self.service.realtime_aggregator = FreeQuoteAggregator(fail=True)
+        self.service.chart_data = IntradayChartStub([], trade_date="2026-07-30")
+        DeniedRealtimeClientStub.quote_calls = 0
+
+        with patch("backend.features.market.service.datetime", FixedMarketDatetime), patch(
+            "backend.features.market.service.TushareClient", DeniedRealtimeClientStub
+        ):
+            result = self.service._prepare_stock_detail(_history_payload(), "002141", today)
+
+        self.assertEqual(result["prices"][-1]["trade_date"], "2026-07-30")
+        self.assertFalse(result["meta"].get("realtime", False))
+        self.assertEqual(result["meta"]["notice"], TODAY_DAILY_UNAVAILABLE_NOTICE)
+        self.assertEqual(len(result["prices"]), 1)
+
+    def test_lunch_keeps_morning_realtime_bar(self):
+        today = FixedLunchDatetime.fixed_now.strftime("%Y%m%d")
+        self.service.realtime_aggregator = FreeQuoteAggregator(
+            _free_quote(quote_time_epoch=int(datetime(2026, 7, 31, 11, 30).timestamp()))
+        )
+        DeniedRealtimeClientStub.quote_calls = 0
+        with patch("backend.features.market.service.datetime", FixedLunchDatetime), patch(
+            "backend.features.market.service.TushareClient", DeniedRealtimeClientStub
+        ):
+            result = self.service._prepare_stock_detail(_history_payload(), "002141", today)
+
+        self.assertEqual(result["prices"][-1]["trade_date"], "2026-07-31")
+        self.assertTrue(result["meta"]["realtime"])
+
+    def test_after_close_keeps_forming_bar_until_official_ready(self):
+        today = FixedAfterCloseDatetime.fixed_now.strftime("%Y%m%d")
+        self.service.realtime_aggregator = FreeQuoteAggregator(_free_quote())
+        DeniedRealtimeClientStub.quote_calls = 0
+        with patch("backend.features.market.service.datetime", FixedAfterCloseDatetime), patch(
+            "backend.features.market.service.TushareClient", DeniedRealtimeClientStub
+        ):
+            forming = self.service._prepare_stock_detail(_history_payload(), "002141", today)
+        self.assertEqual(forming["prices"][-1]["trade_date"], "2026-07-31")
+        self.assertTrue(forming["prices"][-1]["realtime"])
+
+        official = _history_payload()
+        official["prices"].append(
+            {
+                "trade_date": "2026-07-31",
+                "open": 10.15,
+                "high": 10.9,
+                "low": 10.05,
+                "close": 10.7,
+                "change": 7.0,
+                "volume": 1800,
+                "amount_billion": 0.3,
+            }
+        )
+        RealtimeClientStub.quote_calls = 0
+        with patch("backend.features.market.service.datetime", FixedAfterCloseDatetime), patch(
+            "backend.features.market.service.TushareClient", RealtimeClientStub
+        ):
+            replaced = self.service._prepare_stock_detail(official, "002141", today)
+
+        self.assertEqual(replaced["prices"][-1]["close"], 10.7)
+        self.assertFalse(replaced["prices"][-1].get("realtime", False))
+        self.assertEqual(len(replaced["prices"]), 2)
+        self.assertEqual(RealtimeClientStub.quote_calls, 0)
+
+    def test_same_date_bar_is_replaced_not_duplicated(self):
+        today = FixedMarketDatetime.fixed_now.strftime("%Y%m%d")
+        payload = _history_payload()
+        payload["prices"].append(
+            {
+                "trade_date": "2026-07-31",
+                "open": 10.0,
+                "high": 10.1,
+                "low": 9.9,
+                "close": 10.05,
+                "change": 0.5,
+                "volume": 10,
+                "amount_billion": 0.01,
+                "realtime": True,
+            }
+        )
+        self.service.realtime_aggregator = FreeQuoteAggregator(_free_quote())
+        DeniedRealtimeClientStub.quote_calls = 0
+        with patch("backend.features.market.service.datetime", FixedMarketDatetime), patch(
+            "backend.features.market.service.TushareClient", DeniedRealtimeClientStub
+        ):
+            result = self.service._prepare_stock_detail(payload, "002141", today)
+
+        self.assertEqual(len(result["prices"]), 2)
+        self.assertEqual(result["prices"][-1]["close"], 10.6)
+        self.assertEqual(result["prices"][-1]["trade_date"], "2026-07-31")
+
 
 if __name__ == "__main__":
     unittest.main()