Add clear-and-refetch for hub K-line cache.

Force refresh wipes the series in hub_kline.db before pulling from the exchange; add a Linux clear script and rename the UI button to 清库重拉.

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

manual_trading_hub/hub.py

@@ -675,6 +675,7 @@ def api_chart_ohlcv(
             bms = int(bms_raw)
         except ValueError:
             raise HTTPException(status_code=400, detail="before_ms 无效")
+    clear_db = force and not tail_refresh and bms is None
 
     def remote_fetch(**kwargs):
         tf_use = kwargs.get("timeframe") or timeframe
@@ -693,6 +694,7 @@ def api_chart_ohlcv(
         remote_fetch,
         force_refresh=force,
         tail_refresh=tail_refresh,
+        clear_db=clear_db,
         limit=lim,
         before_ms=bms,
     )

manual_trading_hub/static/chart.js

@@ -2648,6 +2648,7 @@
         (data.from_cache || 0) +
         " / 新拉 " +
         (data.fetched || 0) +
+        (data.cleared ? " · 清库 " + data.cleared : "") +
         " · 左拖加载更多 · 后台 " +
         (data.chart_poll_interval_sec || 5) +
         "s";

manual_trading_hub/static/index.html

@@ -98,7 +98,7 @@
           </select>
         </label>
         <button type="button" id="market-load" class="primary">加载</button>
-        <button type="button" id="market-refresh" class="ghost">强制刷新</button>
+        <button type="button" id="market-refresh" class="ghost" title="清空该币种本周期 K 线缓存并从交易所重新拉取">清库重拉</button>
         <span class="toolbar-spacer"></span>
         <span id="market-bar-countdown" class="toolbar-meta market-countdown"></span>
         <span id="market-updated" class="toolbar-meta"></span>
@@ -349,7 +349,7 @@
 
   <div id="toast"></div>
   <script src="https://unpkg.com/lightweight-charts@4.2.0/dist/lightweight-charts.standalone.production.js"></script>
-  <script src="/assets/chart.js?v=20260608-fetch-fix"></script>
+  <script src="/assets/chart.js?v=20260608-clear-refetch"></script>
   <script src="/assets/archive.js?v=20260607-hub-archive-v6"></script>
   <script src="/assets/ai_review_render.js?v=2"></script>
   <script src="/assets/app.js?v=20260607-hub-archive-v1"></script>