Use DBC_DISPLAY_NAME and don't clear frozenRef

Preserve frozenRef when clearing traces and add a configurable DBC display name.

Author: haoruizhou

pecan/src/pages/Trace.tsx

@@ -458,7 +458,6 @@ function Trace() {
 
   const handleClear = useCallback(() => {
     clearTrace();
-    frozenRef.current = [];
   }, [clearTrace]);
 
   // Handle Easter Egg Trigger

universal-telemetry-software/deploy/.env.macbook

@@ -4,6 +4,7 @@
 REMOTE_IP=10.71.1.10
 TIMESCALE_TABLE=WFR26test
 DBC_HOST_PATH=../../secret-dbc/WFR25.dbc
+DBC_DISPLAY_NAME=WFR25.dbc
 GRAFANA_ADMIN_PASSWORD=admin
 
 # Cloud Sync dashboard — http://localhost:8092

universal-telemetry-software/deploy/docker-compose.macbook-base.yml

@@ -41,6 +41,7 @@ services:
       - POSTGRES_DSN=postgresql://wfr:wfr_password@timescaledb:5432/wfr
       - TIMESCALE_TABLE=${TIMESCALE_TABLE:-WFR26test}_base
       - DBC_FILE_PATH=/app/active.dbc
+      - DBC_DISPLAY_NAME=${DBC_DISPLAY_NAME:-example.dbc}
     volumes:
       - ${DBC_HOST_PATH:-./example.dbc}:/app/active.dbc:ro
       - raw_can_data:/app/raw_can_logs

universal-telemetry-software/src/data.py

@@ -636,7 +636,7 @@ async def stats_publisher():
                     "ecu_synced": self._ecu_synced,
                     "ecu_sync_source": self._sync_source,
                     "timescale": timescale_status,
-                    "dbc_file": os.getenv("DBC_FILE_PATH", "unknown"),
+                    "dbc_file": os.getenv("DBC_DISPLAY_NAME") or os.path.basename(os.getenv("DBC_FILE_PATH", "unknown")),
                     "car_time_synced": self._car_time_synced,
                     "base_clock_bad": self._base_clock_bad,
                     "last_udp_time": self.last_udp_time,