fix: remove value history cooldown hack, dismiss popup on clear

The cooldown suppressed tracking for ~1s but the popup persisted showing
stale "1h ago" values because applyDocument skips popup dismissal.
Replaced with explicit dismissHistoryPopup() after clear+refresh so the
popup is gone immediately. Value tracking resumes on the next async cycle
with a clean baseline (m_refreshGen++ discards in-flight reads,
m_prevPages.clear() prevents phantom diffs).

src/controller.cpp

@@ -602,8 +602,7 @@ void RcxController::refresh() {
         else if (m_doc->provider && m_doc->provider->isValid() && m_doc->provider->isLive())
             prov = m_doc->provider.get();
 
-        if (m_valueTrackCooldown > 0) --m_valueTrackCooldown;
-        if (m_trackValues && prov && m_valueTrackCooldown <= 0) {
+        if (m_trackValues && prov) {
             for (auto& lm : m_lastResult.meta) {
                 if (lm.nodeIdx < 0 || lm.nodeIdx >= m_doc->tree.nodes.size()) continue;
                 if (isSyntheticLine(lm) || lm.isContinuation) continue;
@@ -1711,8 +1710,9 @@ void RcxController::showContextMenu(RcxEditor* editor, int line, int nodeIdx,
                 m_refreshGen++;           // discard in-flight async reads
                 m_prevPages.clear();      // clean baseline for next read cycle
                 m_changedOffsets.clear();  // no phantom change indicators
-                m_valueTrackCooldown = 5; // suppress tracking for ~1s
                 refresh();
+                for (auto* editor : m_editors)
+                    editor->dismissHistoryPopup();
             });
         }
         menu.addSeparator();
@@ -1935,8 +1935,9 @@ void RcxController::showContextMenu(RcxEditor* editor, int line, int nodeIdx,
                 m_refreshGen++;           // discard in-flight async reads
                 m_prevPages.clear();      // clean baseline for next read cycle
                 m_changedOffsets.clear();  // no phantom change indicators
-                m_valueTrackCooldown = 5; // suppress tracking for ~1s
                 refresh();
+                for (auto* editor : m_editors)
+                    editor->dismissHistoryPopup();
             });
         }
         menu.addSeparator();

src/controller.h

@@ -183,7 +183,6 @@ private:
     QSet<int64_t>   m_changedOffsets;
     QHash<uint64_t, ValueHistory> m_valueHistory;
     bool            m_trackValues = true;
-    int             m_valueTrackCooldown = 0;
     uint64_t        m_refreshGen = 0;
     uint64_t        m_readGen = 0;
     bool            m_readInFlight = false;

src/editor.cpp

@@ -1387,6 +1387,11 @@ void RcxEditor::showFindBar() {
     m_findPos = 0;
 }
 
+void RcxEditor::dismissHistoryPopup() {
+    if (m_historyPopup)
+        static_cast<ValueHistoryPopup*>(m_historyPopup)->dismiss();
+}
+
 void RcxEditor::hideFindBar() {
     m_findBarContainer->setVisible(false);
     long docLen = m_sci->SendScintilla(QsciScintillaBase::SCI_GETLENGTH);

src/editor.h

@@ -34,6 +34,7 @@ public:
     int currentNodeIndex() const;
     void scrollToNodeId(uint64_t nodeId);
     void showFindBar();
+    void dismissHistoryPopup();
 
     // ── Column span computation ──
     static ColumnSpan typeSpan(const LineMeta& lm, int typeW = kColType);