Add Trace DASP preference to print protocol transactions to terminal

New checkbox in Preferences (default off). When enabled, every DASP
send (>>>) and receive (<<<) prints message type, seq/ack numbers,
payload size, and remote address to stdout.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

app_state.py

@@ -8,7 +8,7 @@ so later rebinding would only ever be seen by the module that did it.
 import configparser
 import os
 
-VERSION = "0.0.0.075"
+VERSION = "0.0.0.076"
 PROPERTIES_FILE = os.path.join(os.path.dirname(os.path.abspath(__file__)), "editor.properties")
 DEFAULT_GRID_SIZE = 10
 DEFAULT_ADD_TIMESTAMP = True
@@ -111,6 +111,7 @@ def load_preferences():
     box_width = DEFAULT_BOX_WIDTH
     left_pane_width = DEFAULT_LEFT_PANE_WIDTH
     sedona_home = ""
+    trace_dasp = False
 
     if os.path.exists(PROPERTIES_FILE):
         try:
@@ -122,6 +123,7 @@ def load_preferences():
                 "Editor", "left_pane_width", fallback=DEFAULT_LEFT_PANE_WIDTH
             )
             sedona_home = config.get("Editor", "sedona.home", fallback="").strip()
+            trace_dasp = config.getboolean("Editor", "trace_dasp", fallback=False)
         except Exception:
             pass
     else:
@@ -142,7 +144,7 @@ def load_preferences():
     left_pane_width = max(
         MIN_ALLOWED_LEFT_PANE_WIDTH, min(MAX_ALLOWED_LEFT_PANE_WIDTH, left_pane_width)
     )
-    return sedona_home, grid_size, add_timestamp, box_width, left_pane_width
+    return sedona_home, grid_size, add_timestamp, box_width, left_pane_width, trace_dasp
 
 
 def save_preferences():
@@ -153,7 +155,8 @@ def save_preferences():
         "grid_size": str(GRID_SIZE),
         "add_timestamp": str(ADD_TIMESTAMP),
         "box_width": str(BOX_WIDTH),
-        "left_pane_width": str(LEFT_PANE_WIDTH)
+        "left_pane_width": str(LEFT_PANE_WIDTH),
+        "trace_dasp": str(TRACE_DASP),
     }
     with open(PROPERTIES_FILE, "w") as configfile:
         config.write(configfile)
@@ -217,4 +220,4 @@ def base_window_title_live():
     return f"Sedona Live Editor [v{VERSION}] — {device_host}:{device_port}"
 
 
-SEDONA_HOME, GRID_SIZE, ADD_TIMESTAMP, BOX_WIDTH, LEFT_PANE_WIDTH = load_preferences()
+SEDONA_HOME, GRID_SIZE, ADD_TIMESTAMP, BOX_WIDTH, LEFT_PANE_WIDTH, TRACE_DASP = load_preferences()