fix(HEL-485): 盘中选择当天不再整页退回昨天

交易时段缺少盘后正式数据时继续展示当天盘中行情，只有开盘前、周末和历史日期才沿用最近收盘结果。

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

config/architecture-inventory.json

@@ -508,8 +508,8 @@
     },
     {
       "path": "backend/data/providers/tushare_dashboard.py",
-      "bytes": 28234,
-      "lines": 648
+      "bytes": 28327,
+      "lines": 654
     },
     {
       "path": "backend/data/providers/tushare_industries.py",
@@ -551,6 +551,11 @@
       "bytes": 15311,
       "lines": 387
     },
+    {
+      "path": "frontend/shared/dashboard.js",
+      "bytes": 15063,
+      "lines": 321
+    },
     {
       "path": "frontend/pages/pools/page.html",
       "bytes": 14942,
@@ -561,11 +566,6 @@
       "bytes": 14743,
       "lines": 342
     },
-    {
-      "path": "frontend/shared/dashboard.js",
-      "bytes": 14740,
-      "lines": 316
-    },
     {
       "path": "frontend/shared/admin.js",
       "bytes": 14410,
@@ -638,8 +638,8 @@
     },
     {
       "path": "backend/data/providers/tushare_daily.py",
-      "bytes": 6837,
-      "lines": 160
+      "bytes": 6949,
+      "lines": 168
     },
     {
       "path": "backend/application.py",
@@ -786,6 +786,11 @@
       "bytes": 2514,
       "lines": 63
     },
+    {
+      "path": "backend/data/providers/tushare_helpers.py",
+      "bytes": 2360,
+      "lines": 75
+    },
     {
       "path": "backend/jobs/service.py",
       "bytes": 2337,
@@ -811,11 +816,6 @@
       "bytes": 2165,
       "lines": 35
     },
-    {
-      "path": "backend/data/providers/tushare_helpers.py",
-      "bytes": 2083,
-      "lines": 64
-    },
     {
       "path": "frontend/pages/market/breadth.js",
       "bytes": 2071,
@@ -827,13 +827,13 @@
       "lines": 45
     },
     {
-      "path": "backend/features/system/routes.py",
-      "bytes": 1791,
-      "lines": 46
+      "path": "backend/jobs/refresh.py",
+      "bytes": 1808,
+      "lines": 48
     },
     {
-      "path": "backend/jobs/refresh.py",
-      "bytes": 1728,
+      "path": "backend/features/system/routes.py",
+      "bytes": 1791,
       "lines": 46
     },
     {