feat: add interactive folder selection for CSV saves and stabilize cross-platform dependency locking

src/pygui/ISC/HomePage.qml

@@ -24,8 +24,15 @@ Rectangle {
     property int selectedTabIndex: 0
     property int selectedSideActionIndex: -1   // nothing active on startup
 
+    property bool memoryRead: false
+    property bool waferDetected: false
+
     Connections {
         target: deviceController
+        function onDetectResult(result){ 
+            //result is a waferInfo dict on success, None on failure
+            root.waferDetected = (result != null && result!= undefined)
+        }
         function onParsedDataReady(result) {
             if (result.success && result.csv_path) {
                 // Load the freshly read CSV into the player
@@ -36,8 +43,23 @@ Rectangle {
             }
         }
     }
+   Connections {
+       target: deviceController
+       function onReadResult(result) {
+           // result has "success" key on success, "error" key on failure
+           root.memoryRead = (result !== null &&
+                              result !== undefined &&
+                              result.success === true)
 
-    // ===== Main Two-Column Layout =====
+           if (root.memoryRead) {
+               console.log(`[P1.1] Memory read complete: ${result.bytes} bytes`)
+           } else {
+               console.log(`[P1.1] Read failed: ${result.error || "unknown"}`)
+           }
+       }
+   }
+
+    // ===== Main Two-Column Layout ======
     RowLayout {
         anchors.fill: parent
         spacing: 0
@@ -66,6 +88,16 @@ Rectangle {
                     Button {
                         id: control
                         text: modelData
+                        enabled: {
+                            switch (index) {
+                                case 0: return true              // DETECT WAFER
+                                case 1: return root.waferDetected // READ MEMORY
+                                case 2: return root.memoryRead    // OPEN CSV IN EXCEL
+                                case 3: return root.waferDetected // ERASE MEMORY
+                                case 4: return root.memoryRead    // IMPORT DATA
+                                default: return true              // STORED DATA
+                            }
+                        }
                         property bool isActive: index === root.selectedSideActionIndex
                         Layout.fillWidth: true
                         Layout.preferredHeight: Math.max(Theme.sideButtonMinHeight, sideRail.computedButtonHeight)
@@ -74,6 +106,7 @@ Rectangle {
                             root.selectedSideActionIndex = index
                             root.selectedTabIndex = 0          // always jump to Status tab
                             if (index === 0) {
+                                root.memoryRead = false
                                 streamController.setMode("review")
                                 streamController.stopStream()
                                 deviceController.detectWafer()

src/pygui/ISC/Tabs/StatusTab.qml

@@ -1,6 +1,7 @@
 import QtQuick
 import QtQuick.Layouts
 import QtQuick.Controls
+import QtQuick.Dialogs
 import ISC
 
 // ===== Status Tab =====
@@ -29,6 +30,28 @@ ColumnLayout {
     property string csvPath: ""
     property bool dataParsed: false
 
+    function cleanFolderUrl(url) {
+        return decodeURIComponent(String(url).replace(/^file:\/\//, ""))
+    }
+
+    function currentFamilyCode() {
+        var info = deviceController.lastWaferInfo
+        return info && info.length > 0 ? (info[0] || "") : ""
+    }
+
+    function parseAndSavePendingRead() {
+        deviceController.parseAndSaveData(root.currentFamilyCode(), deviceController.selectedPort || "")
+    }
+
+    FolderDialog {
+        id: saveDirDialog
+        title: "Choose CSV Save Folder"
+        onAccepted: {
+            deviceController.setSaveDataDir(root.cleanFolderUrl(selectedFolder))
+            root.parseAndSavePendingRead()
+        }
+    }
+
     // ===== Empty state — nothing shown until detect fires =====
     Item {
         Layout.fillWidth: true
@@ -345,6 +368,9 @@ ColumnLayout {
             root.dataRows   = 0
             root.dataCols   = 0
             root.csvPath    = ""
+
+            if (result && result.success === true)
+                saveDirDialog.open()
         }
     }
 

src/pygui/backend/controllers/device_controller.py

@@ -303,7 +303,8 @@ class DeviceController(QObject):
         """Read wafer memory in a background thread.
 
         Uses the family code and port from the last detect.
-        Emits readResult on completion, then auto-chains to parseAndSaveData.
+        Emits readResult on completion; QML prompts for the save directory
+        before calling parseAndSaveData.
         """
         if self._operation_in_progress:
             self._append_log("Already busy — ignoring read request")
@@ -350,9 +351,7 @@ class DeviceController(QObject):
             self._raw_bytes = data
             self.readResult.emit({"success": True, "bytes": len(data)})
             self._set_operation_progress(False)
-            # Auto-chain: read → parse → save (matches C# behavior).
-            # Parse runs on main thread — it's CPU-bound but bounded (~1s).
-            self.parseAndSaveData(family_code, port)
+            self._append_log("Memory read complete - choose save directory to save CSV")
             self._save_status()
             return
         self._connection_status = "Disconnected"
@@ -489,6 +488,7 @@ class DeviceController(QObject):
             return
 
         self._append_log(f"Saved CSV: {csv_path}")
+        self._last_csv_path = csv_path
 
         # Load data into the QAbstractTableModel
         self._data_model.load_data(temp_data, cols)