fix(jira-knowledge): replace hover tooltip with click-based popup for help button

Native Qt tooltips on macOS are unreliable (delayed or invisible). Replace
with a QFrame popup that appears on click, positioned below the ? button,
and closes when clicking elsewhere (Qt.Popup flag handles ESC and outside-click).

- Store help text in self._help_text instead of setToolTip()
- Add _toggle_help_popup() method: creates/destroys floating QFrame
- Update test to check _help_text attribute instead of toolTip()

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

tests/ui/test_jira_knowledge_help_ux.py

@@ -51,15 +51,16 @@ def test_help_icon_exists(dialog):
 
 
 def test_help_icon_has_tooltip(dialog):
-    """Help icon must have a non-empty tooltip with both Project ID and Jira Key explanations."""
+    """Help icon must store help text with both Project ID and Jira Key explanations."""
     from PySide6.QtWidgets import QToolButton
     dlg = dialog
     help_icons = dlg.findChildren(QToolButton)
     assert help_icons, "No help button found"
-    tooltip = help_icons[0].toolTip()
-    assert tooltip, "Help button has no tooltip"
-    assert "Project ID" in tooltip, "Tooltip missing Project ID explanation"
-    assert "Jira Key" in tooltip, "Tooltip missing Jira Key explanation"
+    # Help text is stored in _help_text for click-based popup
+    help_text = getattr(dlg, '_help_text', '') or help_icons[0].toolTip()
+    assert help_text, "Help button has no help content"
+    assert "Project ID" in help_text, "Help content missing Project ID explanation"
+    assert "Jira Key" in help_text, "Help content missing Jira Key explanation"
 
 
 # ---- Help text content ----------------------------------------------------

ui/connectors_panel.py

@@ -11,12 +11,12 @@ setup dialog; OneDrive/SharePoint: neither, they only toggle).
 """
 from __future__ import annotations
 
-from PySide6.QtCore import Qt
+from PySide6.QtCore import Qt, QPoint
 from PySide6.QtGui import QFont
 from PySide6.QtWidgets import (
     QCheckBox, QDialog, QFormLayout, QFrame, QGroupBox, QHBoxLayout, QLabel,
-    QLineEdit, QMessageBox, QPushButton, QScrollArea, QToolButton, QToolTip,
-    QVBoxLayout, QWidget,
+    QLineEdit, QMessageBox, QPushButton, QScrollArea, QToolButton,
+    QVBoxLayout, QWidget, QApplication,
 )
 
 from ..core.ext_connectors import CATEGORIES as EXT_CATEGORIES
@@ -109,12 +109,6 @@ class JiraConnectDialog(QDialog):
         mapping_label = QLabel(tr("connectors.jira_kb_mapping_label"))
         self.help_icon = QToolButton()
         self.help_icon.setText("?")
-        self.help_icon.setToolTip(
-            "<b>" + tr("connectors.jira_kb_project_id_title") + "</b><br>"
-            + tr("connectors.jira_kb_project_id_help")
-            + "<br><br><b>" + tr("connectors.jira_kb_jira_key_title") + "</b><br>"
-            + tr("connectors.jira_kb_jira_key_help")
-        )
         self.help_icon.setStyleSheet("""
             QToolButton {
                 border: 1px solid #5B9BD5;
@@ -135,9 +129,15 @@ class JiraConnectDialog(QDialog):
                 color: white;
             }
         """)
-        # Native Qt tooltip: hover to show, no click handler needed.
-        # AutoRaise=False keeps the button always visible (not faded out).
-        self.help_icon.setAutoRaise(False)
+        # Click-based popover: build help content once, show on click
+        self._help_text = (
+            "<b>" + tr("connectors.jira_kb_project_id_title") + "</b><br>"
+            + tr("connectors.jira_kb_project_id_help")
+            + "<br><br><b>" + tr("connectors.jira_kb_jira_key_title") + "</b><br>"
+            + tr("connectors.jira_kb_jira_key_help")
+        )
+        self._help_popup = None
+        self.help_icon.clicked.connect(self._toggle_help_popup)
         label_row = QHBoxLayout()
         label_row.setSpacing(4)
         label_row.addWidget(mapping_label)
@@ -188,6 +188,43 @@ class JiraConnectDialog(QDialog):
         self.kb_enabled.toggled.connect(self._update_sync_state)
         self._update_sync_state(self.kb_enabled.isChecked())
 
+    def _toggle_help_popup(self) -> None:
+        """Show/hide a floating help popup when the ? button is clicked."""
+        if self._help_popup is not None and self._help_popup.isVisible():
+            self._help_popup.hide()
+            self._help_popup.deleteLater()
+            self._help_popup = None
+            return
+
+        popup = QFrame(self)
+        popup.setWindowFlags(Qt.Popup | Qt.FramelessWindowHint)
+        popup.setAttribute(Qt.WA_DeleteOnClose, False)
+        popup.setStyleSheet("""
+            QFrame {
+                background: #2D2D2D;
+                border: 1px solid #5B9BD5;
+                border-radius: 8px;
+                padding: 12px;
+            }
+        """)
+        popup_layout = QVBoxLayout(popup)
+        popup_layout.setContentsMargins(12, 10, 12, 10)
+
+        content = QLabel(self._help_text)
+        content.setWordWrap(True)
+        content.setMaximumWidth(380)
+        content.setStyleSheet("color: #E0E0E0; font-size: 12px; background: transparent; border: none;")
+        content.setTextFormat(Qt.RichText)
+        content.setOpenExternalLinks(True)
+        popup_layout.addWidget(content)
+
+        # Position below the help button
+        btn_global = self.help_icon.mapToGlobal(QPoint(0, self.help_icon.height()))
+        popup.move(btn_global)
+        popup.show()
+        popup.raise_()
+        self._help_popup = popup
+
     def _on_paste(self, text: str) -> None:
         """Auto-fill Base URL from a pasted Jira link."""
         import re