add UBX-MON-VER support and surface device identification in CLI/GUI

Add the Ver message parser and a fixed UbxQuery (was unused and had a
broken semaphore/state bug) to poll MON-VER once on connect. The CLI
prints hw/sw version and extensions; the GUI polls it per receiver,
pre-fills the read-only ID field with a connection counter and
rewrites it from the MOD= extension once the device answers, and
propagates the resolved display name to the Sky and Plot tabs so they
no longer show the stale placeholder ID.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01XM4FNUjhu9x8df5Dp1hHvd

gui/connection_tab.py

@@ -1,4 +1,4 @@
-import sys, os
+import sys, os, itertools
 
 _root = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
 _gui  = os.path.dirname(os.path.abspath(__file__))
@@ -19,6 +19,8 @@ from backend.file_backend import source_id_from_path
 BAUD_RATES = ['4800', '9600', '19200', '38400', '57600', '115200',
               '230400', '460800', '921600']
 
+_connection_counter = itertools.count(1)
+
 
 class _StatusDot(QLabel):
     def __init__(self):
@@ -45,10 +47,11 @@ class ConnectionRow(QWidget):
         layout.setContentsMargins(4, 2, 4, 2)
         layout.setSpacing(6)
 
-        # ── Receiver ID ──────────────────────────────────────────────────────
+        # ── Receiver ID (read-only: pre-filled with a counter, rewritten from
+        #    MON-VER once the device answers, or derived from the file path) ──
         layout.addWidget(QLabel("ID:"))
         self._id_edit = QLineEdit()
-        self._id_edit.setPlaceholderText("receiver-id")
+        self._id_edit.setReadOnly(True)
         self._id_edit.setFixedWidth(110)
         layout.addWidget(self._id_edit)
 
@@ -125,6 +128,11 @@ class ConnectionRow(QWidget):
         layout.addWidget(self._stack)
         layout.addStretch()
 
+        # ── Device identification (read-only, from MON-VER on connect) ────────
+        self._version_label = QLabel("")
+        self._version_label.setStyleSheet("color: #888888; font-size: 11px;")
+        layout.addWidget(self._version_label)
+
         # ── Status / buttons ─────────────────────────────────────────────────
         self._dot = _StatusDot()
         layout.addWidget(self._dot)
@@ -141,6 +149,8 @@ class ConnectionRow(QWidget):
 
         if config:
             self.apply_config(config)
+        else:
+            self._id_edit.setText(f"conn-{next(_connection_counter)}")
 
     # ── File browse ──────────────────────────────────────────────────────────
 
@@ -199,10 +209,17 @@ class ConnectionRow(QWidget):
         self._connected = connected
         self._dot.set_connected(connected)
         self._conn_btn.setText("Disconnect" if connected else "Connect")
-        for w in [self._id_edit, self._type_combo, self._host_edit,
+        for w in [self._type_combo, self._host_edit,
                   self._port_spin, self._ser_combo, self._baud_combo,
                   self._file_edit, self._delay_spin]:
             w.setEnabled(not connected)
+        if not connected:
+            self._version_label.setText("")
+
+    def set_version_info(self, device_id: str, sw_version: str):
+        if device_id:
+            self._id_edit.setText(device_id)
+        self._version_label.setText(sw_version)
 
     # ── Slots ────────────────────────────────────────────────────────────────
 
@@ -287,6 +304,7 @@ class ConnectionTab(QWidget):
         outer.addLayout(bottom)
 
         model.connection_changed.connect(self._on_connection_changed)
+        model.version_update.connect(self._on_version_update)
 
     # ── History combo ─────────────────────────────────────────────────────────
 
@@ -332,3 +350,9 @@ class ConnectionTab(QWidget):
                 break
         if connected:
             self._refresh_history_combo()
+
+    def _on_version_update(self, rid: str, device_id: str, sw_version: str):
+        for row in self._rows:
+            if row.get_receiver_id() == rid:
+                row.set_version_info(device_id, sw_version)
+                break