chore: commit all changes and remove large IQ captures from tracking

Add .gitignore entry for data/subghz/captures/ to prevent large
IQ recording files from being committed.

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

tests/test_rtl_fm_modulation.py

@@ -0,0 +1,38 @@
+"""Tests for rtl_fm modulation token mapping."""
+
+from routes.listening_post import _rtl_fm_demod_mode as listening_post_rtl_mode
+from utils.sdr.base import SDRDevice, SDRType
+from utils.sdr.rtlsdr import RTLSDRCommandBuilder, _rtl_fm_demod_mode as builder_rtl_mode
+
+
+def _dummy_rtlsdr_device() -> SDRDevice:
+    return SDRDevice(
+        sdr_type=SDRType.RTL_SDR,
+        index=0,
+        name='RTL-SDR',
+        serial='00000001',
+        driver='rtlsdr',
+        capabilities=RTLSDRCommandBuilder.CAPABILITIES,
+    )
+
+
+def test_rtl_fm_modulation_maps_wfm_to_wbfm() -> None:
+    assert listening_post_rtl_mode('wfm') == 'wbfm'
+    assert builder_rtl_mode('wfm') == 'wbfm'
+
+
+def test_rtl_fm_modulation_keeps_other_modes() -> None:
+    assert listening_post_rtl_mode('fm') == 'fm'
+    assert builder_rtl_mode('am') == 'am'
+
+
+def test_rtlsdr_builder_uses_wbfm_token_for_wfm() -> None:
+    builder = RTLSDRCommandBuilder()
+    cmd = builder.build_fm_demod_command(
+        device=_dummy_rtlsdr_device(),
+        frequency_mhz=98.1,
+        modulation='wfm',
+    )
+    mode_index = cmd.index('-M')
+    assert cmd[mode_index + 1] == 'wbfm'
+