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, 13 insertions, 0 deletions

diff --git a/ui/style_dark.qss b/ui/style_dark.qss
index cfb127d..06c70d9 100644
--- a/ui/style_dark.qss
+++ b/ui/style_dark.qss
@@ -125,6 +125,12 @@ QFrame#deviceCard:hover { border-color: #3b82f6; background-color: #1c2540; }
 
 QLabel#deviceIcon  { font-size: 18px; }
 QLabel#deviceName  { font-size: 13px; font-weight: 600; color: #e2e8f0; }
+QLineEdit#deviceName {
+    font-size: 13px; font-weight: 600; color: #e2e8f0;
+    background: transparent; border: 1px solid transparent; border-radius: 3px; padding: 0 2px;
+}
+QLineEdit#deviceName:hover  { border-color: #2a3558; }
+QLineEdit#deviceName:focus  { border-color: #3b82f6; background-color: #161d2e; }
 QLabel#deviceSub   { font-family: "IBM Plex Mono", monospace; font-size: 11px; color: #8b9dc3; }
 QLabel#deviceChannelCount { font-size: 11px; color: #3b82f6; }
 
@@ -222,6 +228,10 @@ QTableWidget#channelTable {
     color: #e2e8f0;
     font-size: 12px;
 }
+QTableWidget#channelTable::item:selected {
+    background-color: #3b82f6;
+    color: #0b0e13;
+}
 QHeaderView::section {
     background-color: #161d2e;
     color: #8b9dc3;
@@ -404,10 +414,13 @@ QPushButton#applyButton:hover { background-color: #1d4ed8; color: #eff6ff; }
 
 /* ── Control widgets ─────────────────────────────────────────────── */
 QFrame#controlWidget { background-color: #161d2e; border: 1px solid #2a3558; border-radius: 6px; }
+QFrame#controlWidget[stale="true"] { border: 1px solid #f59e0b; }
 QWidget#controlWidgetHeader { background-color: #0f1521; border-radius: 5px 5px 0 0; border-bottom: 1px solid #2a3558; }
 QLabel#controlWidgetIcon  { font-size: 14px; color: #3b82f6; padding-right: 4px; }
 QLabel#controlWidgetTitle { font-family: "IBM Plex Mono", monospace; font-size: 11px; font-weight: 700; letter-spacing: 1.5px; color: #8b9dc3; }
+QLabel#controlWidgetStale { color: #f59e0b; font-size: 12px; padding: 0 2px; }
 QWidget#controlWidgetBody { background-color: #161d2e; border-radius: 0 0 5px 5px; }
+QFrame#controlWidget[stale="true"] QWidget#controlWidgetBody { background-color: #1c1710; }
 
 QLabel#motorSpeedLbl { font-family: "IBM Plex Mono", monospace; font-size: 28px; font-weight: 700; color: #00d4ff; }
 QLabel#motorUnitLbl  { font-family: "IBM Plex Mono", monospace; font-size: 12px; color: #64748b; padding-top: 12px; }