refactor(L.8): migrate EntryListPanel and fix signal connections

Change entrySelected signal from double to TimePos. Fix boundaryMoved and boundaryDragFinished lambda signatures in PhonemeLabelerPageSetup to match TimePos signals.

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

Author: wolfgitpr

src/apps/PhonemeLabeler/gui/PhonemeLabelerPageSetup.cpp

@@ -238,7 +238,7 @@ void PhonemeLabelerPage::connectSignals() {
         updateAllBoundaryOverlays();
     });
     // Also repaint overlays when boundaries move (real-time during drag)
-    connect(m_document, &TextGridDocument::boundaryMoved, this, [this](int, int, double) {
+    connect(m_document, &TextGridDocument::boundaryMoved, this, [this](int, int, TimePos) {
         updateAllBoundaryOverlays();
         m_tierEditWidget->update();
         for (auto *child : m_tierEditWidget->findChildren<QWidget *>()) {
@@ -305,7 +305,7 @@ void PhonemeLabelerPage::connectSignals() {
     connect(m_spectrogramWidget, &SpectrogramWidget::boundaryDragStarted, this, onDragStarted);
 
     // Drag finished → clear drag highlight
-    auto onDragFinished = [this](int, int, double) {
+    auto onDragFinished = [this](int, int, TimePos) {
         m_boundaryOverlay->setDraggedBoundary(-1);
     };
     connect(m_waveformWidget, &WaveformWidget::boundaryDragFinished, this, onDragFinished);

src/apps/PhonemeLabeler/gui/ui/EntryListPanel.cpp

@@ -1,5 +1,6 @@
 #include "EntryListPanel.h"
 #include "TextGridDocument.h"
+#include <dstools/TimePos.h>
 #include <dstools/ViewportController.h>
 
 #include <QVBoxLayout>
@@ -67,27 +68,27 @@ void EntryListPanel::rebuildEntries() {
     int count = m_document->intervalCount(tier);
     for (int i = 0; i < count; ++i) {
         QString text = m_document->intervalText(tier, i);
-        double start = m_document->intervalStart(tier, i);
-        double end = m_document->intervalEnd(tier, i);
+        TimePos start = m_document->intervalStart(tier, i);
+        TimePos end = m_document->intervalEnd(tier, i);
 
         QString display;
         if (text.isEmpty()) {
             display = QString("[%1] (%2s - %3s)")
                 .arg(i)
-                .arg(start, 0, 'f', 3)
-                .arg(end, 0, 'f', 3);
+                .arg(usToSec(start), 0, 'f', 3)
+                .arg(usToSec(end), 0, 'f', 3);
         } else {
             display = QString("[%1] %2  (%3s - %4s)")
                 .arg(i)
                 .arg(text)
-                .arg(start, 0, 'f', 3)
-                .arg(end, 0, 'f', 3);
+                .arg(usToSec(start), 0, 'f', 3)
+                .arg(usToSec(end), 0, 'f', 3);
         }
 
         auto *item = new QListWidgetItem(display, m_listWidget);
         item->setData(IntervalIndexRole, i);     // interval index
-        item->setData(IntervalStartRole, start); // start time
-        item->setData(IntervalEndRole, end);     // end time
+        item->setData(IntervalStartRole, static_cast<qlonglong>(start)); // start time
+        item->setData(IntervalEndRole, static_cast<qlonglong>(end));     // end time
     }
 
     // Restore previous selection, or default to first entry
@@ -146,8 +147,8 @@ void EntryListPanel::onCurrentRowChanged(int row) {
     if (!item) return;
 
     int intervalIndex = item->data(IntervalIndexRole).toInt();
-    double start = item->data(IntervalStartRole).toDouble();
-    double end = item->data(IntervalEndRole).toDouble();
+    TimePos start = item->data(IntervalStartRole).toLongLong();
+    TimePos end = item->data(IntervalEndRole).toLongLong();
     int tier = m_document->activeTierIndex();
 
     centerEntryInViewport(intervalIndex);
@@ -165,8 +166,8 @@ void EntryListPanel::centerEntryInViewport(int intervalIndex) {
     if (tier < 0 || intervalIndex < 0 || intervalIndex >= m_document->intervalCount(tier))
         return;
 
-    double start = m_document->intervalStart(tier, intervalIndex);
-    double end = m_document->intervalEnd(tier, intervalIndex);
+    double start = usToSec(m_document->intervalStart(tier, intervalIndex));
+    double end = usToSec(m_document->intervalEnd(tier, intervalIndex));
     double entryCenter = (start + end) / 2.0;
 
     // Center the viewport on the entry

src/apps/PhonemeLabeler/gui/ui/EntryListPanel.h

@@ -4,6 +4,7 @@
 #include <QListWidget>
 
 #include <dstools/ViewportController.h>
+#include <dstools/TimePos.h>
 
 namespace dstools {
 namespace phonemelabeler {
@@ -36,7 +37,7 @@ class EntryListPanel : public QWidget {
 
 signals:
     /// Emitted when the user selects an entry (by click or scroll).
-    void entrySelected(int tierIndex, int intervalIndex, double startTime, double endTime);
+    void entrySelected(int tierIndex, int intervalIndex, TimePos startTime, TimePos endTime);
 
 protected:
     void wheelEvent(QWheelEvent *event) override;