feat(license): wafer license gate, runtime warning, and first-launch wizard

- Gate READ/ERASE/DEBUG behind wafer license check; log hint to load .bin
- waferRuntimeExceeded() warns when onboard runtime > 350s
- LicenseModel: remove-license (soft hide, .bin stays on disk) via
  removed_licenses.txt; re-loading un-hides
- FirstLaunchWizard: 2-step popup (license + save dir) shown on first run
- Per-tab file memory in HomePage (map/graph/data don't bleed state)
- Merge test_device_controller_license into test_device_controller

src/pygui/ISC/Tabs/components/StreamControlPanel.qml

@@ -62,7 +62,22 @@ Rectangle {
 
             TabBar {
                 id: modeBar
+                // Guards the programmatic sync below from re-triggering
+                // onCurrentIndexChanged's setMode()/startStream() side effects.
+                property bool _syncing: false
                 currentIndex: 0
+                Component.onCompleted: {
+                    // WaferMapTab (and this panel) is destroyed/recreated by
+                    // its Loader on every tab switch, so this TabBar always
+                    // starts fresh at index 0 — but streamController.mode is
+                    // backend state that outlives the switch (streaming now
+                    // continues off-tab). Sync the visual index to the real
+                    // mode on creation instead of defaulting to "Review" and
+                    // silently disagreeing with a still-live stream.
+                    _syncing = true
+                    currentIndex = streamController.mode === "live" ? 1 : 0
+                    _syncing = false
+                }
                 spacing: 2
                 padding: 2
                 Layout.fillWidth: true
@@ -152,6 +167,7 @@ Rectangle {
             }
 
             onCurrentIndexChanged: {
+                    if (_syncing) return;
                     if (currentIndex === 1) {
                         if (deviceController.connectionStatus !== "Connected") {
                             currentIndex = 0;