Fix rtl_433 bias-t flag and add TSCM enhancements

- Fix bias-t option in rtl_433 for RTL-SDR and HackRF:
  - rtl_433's -T flag is for timeout, not bias-t
  - RTL-SDR: Use :biast=1 suffix on device string
  - HackRF: Use bias_t=1 in SoapySDR device string
- Add "Listen (FM/AM)" buttons to TSCM RF signal details
  - Switches to Listening Post mode and tunes to frequency
- Fix device detail header padding to prevent protocol badge
  overlapping with close button

utils/sdr/rtlsdr.py

@@ -129,11 +129,22 @@ class RTLSDRCommandBuilder(CommandBuilder):
         Build rtl_433 command for ISM band sensor decoding.
 
         Outputs JSON for easy parsing. Supports local devices and rtl_tcp connections.
+
+        Note: rtl_433's -T flag is for timeout, NOT bias-t.
+        Bias-t is enabled via the device string suffix :biast=1
         """
         rtl_433_path = get_tool_path('rtl_433') or 'rtl_433'
+
+        # Build device argument with optional bias-t suffix
+        # rtl_433 uses :biast=1 suffix on device string, not -T flag
+        # (-T is timeout in rtl_433)
+        device_arg = self._get_device_arg(device)
+        if bias_t:
+            device_arg = f'{device_arg}:biast=1'
+
         cmd = [
             rtl_433_path,
-            '-d', self._get_device_arg(device),
+            '-d', device_arg,
             '-f', f'{frequency_mhz}M',
             '-F', 'json'
         ]
@@ -144,9 +155,6 @@ class RTLSDRCommandBuilder(CommandBuilder):
         if ppm is not None and ppm != 0:
             cmd.extend(['-p', str(ppm)])
 
-        if bias_t:
-            cmd.extend(['-T'])
-
         return cmd
 
     def get_capabilities(self) -> SDRCapabilities: