Persist dock layout to profiles; dedupe port names; Channels-tab Create button

- Fix duplicated device names ("FT231X USB UART - FT231X USB UART (...)")
  — pyserial on Linux often reports the same udev model string twice for
  cheap FTDI/CH340-style adapters. Collapse it at the list_ports() source
  so every consumer (device auto-name, port picker) benefits.

- Save Control Panel / Namespace dock area, floating geometry, visibility,
  size and order to .labui profiles via QMainWindow.saveState()/
  restoreState(), round-tripped through the existing Profile.settings
  passthrough (self._settings) — no profile schema change needed.

- Channels tab: replace the per-row Signal ⊕ button (and its pinned/
  frozen-column overlay) with a single "Create Channel" button below the
  Namespace panel. Select one or more Signal/Channel rows (multi-select
  now supported) and click it — selected rows become the new Channel's
  sources, or an empty Channel is created if nothing's selected. Fixes a
  bug in the process: the multi/zero-source path defaulted to
  kind="expression" with no expression text, which fails to compile and
  silently dropped the channel; use kind="none" instead, which the user
  then edits in the Channels pane.

  NamespacePanel itself (ui/namespace_panel.py) goes back to a plain
  read-only reference widget — the create-channel button and its logic
  live entirely in ConfigWindow (config_window.py), so the shared
  dockable Namespace panel on the main window is unaffected.

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

1 files changed, 13 insertions, 1 deletions

diff --git a/api_layers/arduino_layer.py b/api_layers/arduino_layer.py
index 07520d6..cd7cb92 100644
--- a/api_layers/arduino_layer.py
+++ b/api_layers/arduino_layer.py
@@ -81,6 +81,18 @@ except ImportError:
     _SERIAL_AVAILABLE = False
 
 
+def _dedupe_description(desc: str) -> str:
+    """pyserial on Linux often reports a USB-serial adapter's description as
+    "X - X" (same udev model string used for both halves when there's no
+    separate manufacturer/interface field — common on cheap FTDI/CH340
+    clones), which then reads as a literal duplicate everywhere this
+    description gets shown (device name, port picker). Collapse it."""
+    parts = desc.split(" - ")
+    if len(parts) == 2 and parts[0].strip() == parts[1].strip():
+        return parts[0].strip()
+    return desc
+
+
 class ArduinoLayer:
 
     DEFAULT_ANALOG_PINS  = ["A0", "A1", "A2", "A3", "A4", "A5"]
@@ -552,7 +564,7 @@ class ArduinoLayer:
             return []
         try:
             return [
-                (p.device, p.description or "")
+                (p.device, _dedupe_description(p.description or ""))
                 for p in serial.tools.list_ports.comports()
             ]
         except Exception as e: