Fix SoapySDR detection and HackRF ADS-B error message

- Try multiple SoapySDR utility names: SoapySDRUtil, soapy_sdr_util, soapysdr-util
- Improve error message for HackRF/LimeSDR ADS-B to mention readsb requirement

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

routes/adsb.py

@@ -336,7 +336,10 @@ def start_adsb():
         time.sleep(DUMP1090_START_WAIT)
 
         if app_module.adsb_process.poll() is not None:
-            return jsonify({'status': 'error', 'message': 'dump1090 failed to start. Check RTL-SDR device permissions or if another process is using it.'})
+            if sdr_type == SDRType.RTL_SDR:
+                return jsonify({'status': 'error', 'message': 'dump1090 failed to start. Check RTL-SDR device permissions or if another process is using it.'})
+            else:
+                return jsonify({'status': 'error', 'message': f'ADS-B decoder failed to start for {sdr_type.value}. Ensure readsb is installed with SoapySDR support and the device is connected.'})
 
         adsb_using_service = True
         thread = threading.Thread(target=parse_sbs_stream, args=(f'localhost:{ADSB_SBS_PORT}',), daemon=True)

utils/sdr/detection.py

@@ -144,6 +144,15 @@ def detect_rtlsdr_devices() -> list[SDRDevice]:
     return devices
 
 
+def _find_soapy_util() -> str | None:
+    """Find SoapySDR utility command (name varies by distribution)."""
+    # Try different command names used across distributions
+    for cmd in ['SoapySDRUtil', 'soapy_sdr_util', 'soapysdr-util']:
+        if _check_tool(cmd):
+            return cmd
+    return None
+
+
 def detect_soapy_devices(skip_types: Optional[set[SDRType]] = None) -> list[SDRDevice]:
     """
     Detect SDR devices via SoapySDR.
@@ -156,13 +165,14 @@ def detect_soapy_devices(skip_types: Optional[set[SDRType]] = None) -> list[SDRD
     devices: list[SDRDevice] = []
     skip_types = skip_types or set()
 
-    if not _check_tool('SoapySDRUtil'):
-        logger.debug("SoapySDRUtil not found, skipping SoapySDR detection")
+    soapy_cmd = _find_soapy_util()
+    if not soapy_cmd:
+        logger.debug("SoapySDR utility not found, skipping SoapySDR detection")
         return devices
 
     try:
         result = subprocess.run(
-            ['SoapySDRUtil', '--find'],
+            [soapy_cmd, '--find'],
             capture_output=True,
             text=True,
             timeout=10