fix(jira-knowledge): replace popup with inline help toggle for macOS reliability

QFrame+Qt.Popup and QDialog popups are unreliable on macOS inside
QDialog parents — they may appear behind the parent or not receive
clicks. Replace with a simple inline QLabel that toggles visibility
when the ? button is clicked. This is the most reliable approach
across all platforms.

- Add self._inline_help QLabel below the mapping input (hidden by default)
- _toggle_inline_help() simply shows/hides the label
- Styled with dark background, blue border, matching the app theme
- No external popup windows needed

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

ui/connectors_panel.py

@@ -129,15 +129,14 @@ class JiraConnectDialog(QDialog):
                 color: white;
             }
         """)
-        # Click-based popover: build help content once, show on click
+        # Click-based inline help: toggle a QLabel below the input
         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)
+        self.help_icon.clicked.connect(self._toggle_inline_help)
         label_row = QHBoxLayout()
         label_row.setSpacing(4)
         label_row.addWidget(mapping_label)
@@ -147,6 +146,18 @@ class JiraConnectDialog(QDialog):
         label_widget.setLayout(label_row)
         mapping_form.addRow(label_widget, self.project_mapping)
 
+        # Inline help panel (hidden by default, toggled by ? button)
+        self._inline_help = QLabel(self._help_text)
+        self._inline_help.setObjectName("hint")
+        self._inline_help.setWordWrap(True)
+        self._inline_help.setTextFormat(Qt.RichText)
+        self._inline_help.setStyleSheet(
+            "background: #1E2A3A; border: 1px solid #5B9BD5; border-radius: 6px;"
+            " padding: 8px 10px; color: #E0E0E0; font-size: 12px;"
+        )
+        self._inline_help.hide()
+        mapping_form.addRow("", self._inline_help)
+
         # Validation hint for common mistakes (e.g., entering ABC-123 instead of ABC)
         self.mapping_validation = QLabel()
         self.mapping_validation.setObjectName("hint")
@@ -188,62 +199,12 @@ 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.close()
-            self._help_popup = None
-            return
-
-        # Use a small QDialog (not QFrame+Qt.Popup) — more reliable on macOS
-        popup = QDialog(self)
-        popup.setWindowFlags(Qt.Tool | Qt.FramelessWindowHint)
-        popup.setAttribute(Qt.WA_TranslucentBackground, False)
-        popup.setStyleSheet("""
-            QDialog {
-                background: #2D2D2D;
-                border: 1px solid #5B9BD5;
-                border-radius: 8px;
-            }
-        """)
-        popup_layout = QVBoxLayout(popup)
-        popup_layout.setContentsMargins(14, 12, 14, 12)
-
-        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)
-
-        # Close button row
-        close_row = QHBoxLayout()
-        close_row.addStretch(1)
-        close_btn = QPushButton("✕")
-        close_btn.setFixedSize(24, 24)
-        close_btn.setStyleSheet("""
-            QPushButton {
-                border: none; background: transparent; color: #999;
-                font-size: 14px; font-weight: bold;
-            }
-            QPushButton:hover { color: #fff; }
-        """)
-        close_btn.clicked.connect(popup.close)
-        close_row.addWidget(close_btn)
-        popup_layout.addLayout(close_row)
-
-        # Position below the help button
-        btn_global = self.help_icon.mapToGlobal(
-            QPoint(0, self.help_icon.height() + 4)
-        )
-        popup.move(btn_global)
-        popup.show()
-        popup.raise_()
-        popup.activateWindow()
-        self._help_popup = popup
+    def _toggle_inline_help(self) -> None:
+        """Toggle the inline help panel below the mapping input."""
+        if self._inline_help.isHidden():
+            self._inline_help.show()
+        else:
+            self._inline_help.hide()
 
     def _on_paste(self, text: str) -> None:
         """Auto-fill Base URL from a pasted Jira link."""