Unify Signals/Channels around auto-naming, plot-by-channel, and shared vars

Devices: auto-name from OS-reported port description (Device Manager /
udev string) instead of a generic label; default Serial #Channels 1;
consistent simulate-mode checkbox across backends; inline device rename.

Channels: calibration/filters move out of Signals into a Channel
"Operation" (adds Scale/Offset alongside the existing math kinds);
single-physical-source Channels get an embedded Filters block; new
Channels auto-name/auto-ID from their source and reject duplicate
names/IDs on apply; "Create Channel" button on each Signal row; renamed
"Sources" -> "Signals" in the Channels UI; Signals' READ/WRITE dir badge
(was silently-broken IN/OUT) now reflects the real writable flag.

Plot: default layout is one pane per Channel (not per device, not raw
Signals) titled by channel name; "+ Add Channel" is a checkbox dialog
instead of an inline dropdown; traces get up/down reorder; live unit
changes (e.g. a Mark-10 gauge switching lb/kgF/N/ozF) propagate to an
open pane's axis label without clobbering a manually-typed one.

Control Panel: hardware assignment now picks from the same writable-
Signals list instead of a separate device/channel combo with a
hardcoded Arduino pin list; stale visual indicator when a control's
target device/channel disconnects or disappears; documented the `vars`
bridge (Control Panel On Action Script <-> Channel scripts) in both
directions' help text and script templates.

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

1 files changed, 17 insertions, 3 deletions

diff --git a/ui/windows/devices_window.py b/ui/windows/devices_window.py
index eec65c8..ae88c6b 100644
--- a/ui/windows/devices_window.py
+++ b/ui/windows/devices_window.py
@@ -41,6 +41,7 @@ _STATUS_TEXT = {
 class DeviceRow(QFrame):
     configure_clicked = pyqtSignal(str)
     remove_clicked    = pyqtSignal(str)
+    name_changed      = pyqtSignal(str)
 
     def __init__(self, device):
         super().__init__()
@@ -66,11 +67,14 @@ class DeviceRow(QFrame):
 
         info_col = QVBoxLayout()
         info_col.setSpacing(1)
-        name = QLabel(self.device.info.name)
-        name.setObjectName("deviceName")
+        self._name_edit = QLineEdit(self.device.info.name)
+        self._name_edit.setObjectName("deviceName")
+        self._name_edit.setFrame(False)
+        self._name_edit.setToolTip("Click to rename")
+        self._name_edit.editingFinished.connect(self._on_name_edited)
         id_lbl = QLabel(f"{self.device.info.device_id}  ·  {self.device.info.device_type}")
         id_lbl.setObjectName("deviceSub")
-        info_col.addWidget(name)
+        info_col.addWidget(self._name_edit)
         info_col.addWidget(id_lbl)
         lay.addLayout(info_col, 1)
 
@@ -103,6 +107,16 @@ class DeviceRow(QFrame):
         self._status_lbl.setText(_STATUS_TEXT.get(self.device.status, "?"))
         self._set_status_style()
 
+    def _on_name_edited(self):
+        new_name = self._name_edit.text().strip()
+        if not new_name:
+            self._name_edit.setText(self.device.info.name)
+            return
+        if new_name == self.device.info.name:
+            return
+        self.device.info.name = new_name
+        self.name_changed.emit(self.device.info.device_id)
+
     def _set_dot_color(self):
         c = _DOT_COLOR.get(self.device.status, "#475569")
         self._dot.setStyleSheet(f"color:{c}; font-size:10px;")