feat(ui): decouple QML page modules and update tab layouts

Extract ReadoutPanel, WaferMapView, and TransportBar into reusable components and bind tabs to the new session controllers.

src/pygui/ISC/Tabs/DataTab.qml

@@ -1,6 +1,7 @@
 import QtQuick
 import QtQuick.Controls
 import QtQuick.Layouts
+import QtQuick.TableView
 import ISC
 
 // ===== Data Tab =====
@@ -74,6 +75,29 @@ Item {
             }
         }
 
+        // --- Toolbar ---
+        RowLayout {
+            Layout.fillWidth: true
+            spacing: 8
+
+            Button {
+                text: "Open in Excel"
+                icon.source: "icon/excel.svg"
+                onClicked: deviceController.openCsvFile()
+            }
+
+            Button {
+                text: "Compare"
+                onClicked: compareDialog.open()
+            }
+
+            Button {
+                text: "Split"
+                onClicked: splitDialog.open()
+            }
+
+            Item { Layout.fillWidth: true}
+        }
         // --- Table container ---
         Rectangle {
             Layout.fillWidth: true