Add DMR digital voice, WebSDR, and listening post enhancements

- DMR/P25 digital voice decoder mode with DSD-FME integration
- WebSDR mode with KiwiSDR audio proxy and websocket-client support
- Listening post waterfall/spectrogram visualization and audio streaming
- Dockerfile updates for mbelib and DSD-FME build dependencies
- New tests for DMR, WebSDR, KiwiSDR, waterfall, and signal guess API
- Chart.js date adapter for time-scale axes

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

tests/test_dmr.py

@@ -0,0 +1,145 @@
+"""Tests for the DMR / Digital Voice decoding module."""
+
+from unittest.mock import patch, MagicMock
+import pytest
+from routes.dmr import parse_dsd_output
+
+
+# ============================================
+# parse_dsd_output() tests
+# ============================================
+
+def test_parse_sync_dmr():
+    """Should parse DMR sync line."""
+    result = parse_dsd_output('Sync: +DMR (data)')
+    assert result is not None
+    assert result['type'] == 'sync'
+    assert 'DMR' in result['protocol']
+
+
+def test_parse_sync_p25():
+    """Should parse P25 sync line."""
+    result = parse_dsd_output('Sync: +P25 Phase 1')
+    assert result is not None
+    assert result['type'] == 'sync'
+    assert 'P25' in result['protocol']
+
+
+def test_parse_talkgroup_and_source():
+    """Should parse talkgroup and source ID."""
+    result = parse_dsd_output('TG: 12345  Src: 67890')
+    assert result is not None
+    assert result['type'] == 'call'
+    assert result['talkgroup'] == 12345
+    assert result['source_id'] == 67890
+
+
+def test_parse_slot():
+    """Should parse slot info."""
+    result = parse_dsd_output('Slot 1')
+    assert result is not None
+    assert result['type'] == 'slot'
+    assert result['slot'] == 1
+
+
+def test_parse_voice():
+    """Should parse voice frame info."""
+    result = parse_dsd_output('Voice Frame 1')
+    assert result is not None
+    assert result['type'] == 'voice'
+
+
+def test_parse_nac():
+    """Should parse P25 NAC."""
+    result = parse_dsd_output('NAC: 293')
+    assert result is not None
+    assert result['type'] == 'nac'
+    assert result['nac'] == '293'
+
+
+def test_parse_empty_line():
+    """Empty lines should return None."""
+    assert parse_dsd_output('') is None
+    assert parse_dsd_output('   ') is None
+
+
+def test_parse_unrecognized():
+    """Unrecognized lines should return None."""
+    assert parse_dsd_output('some random text') is None
+
+
+# ============================================
+# Endpoint tests
+# ============================================
+
+@pytest.fixture
+def auth_client(client):
+    """Client with logged-in session."""
+    with client.session_transaction() as sess:
+        sess['logged_in'] = True
+    return client
+
+
+def test_dmr_tools(auth_client):
+    """Tools endpoint should return availability info."""
+    resp = auth_client.get('/dmr/tools')
+    assert resp.status_code == 200
+    data = resp.get_json()
+    assert 'dsd' in data
+    assert 'rtl_fm' in data
+    assert 'protocols' in data
+
+
+def test_dmr_status(auth_client):
+    """Status endpoint should work."""
+    resp = auth_client.get('/dmr/status')
+    assert resp.status_code == 200
+    data = resp.get_json()
+    assert 'running' in data
+
+
+def test_dmr_start_no_dsd(auth_client):
+    """Start should fail gracefully when dsd is not installed."""
+    with patch('routes.dmr.find_dsd', return_value=None):
+        resp = auth_client.post('/dmr/start', json={
+            'frequency': 462.5625,
+            'protocol': 'auto',
+        })
+        assert resp.status_code == 503
+        data = resp.get_json()
+        assert 'dsd' in data['message']
+
+
+def test_dmr_start_no_rtl_fm(auth_client):
+    """Start should fail when rtl_fm is missing."""
+    with patch('routes.dmr.find_dsd', return_value='/usr/bin/dsd'), \
+         patch('routes.dmr.find_rtl_fm', return_value=None):
+        resp = auth_client.post('/dmr/start', json={
+            'frequency': 462.5625,
+        })
+        assert resp.status_code == 503
+
+
+def test_dmr_start_invalid_protocol(auth_client):
+    """Start should reject invalid protocol."""
+    with patch('routes.dmr.find_dsd', return_value='/usr/bin/dsd'), \
+         patch('routes.dmr.find_rtl_fm', return_value='/usr/bin/rtl_fm'):
+        resp = auth_client.post('/dmr/start', json={
+            'frequency': 462.5625,
+            'protocol': 'invalid',
+        })
+        assert resp.status_code == 400
+
+
+def test_dmr_stop(auth_client):
+    """Stop should succeed."""
+    resp = auth_client.post('/dmr/stop')
+    assert resp.status_code == 200
+    data = resp.get_json()
+    assert data['status'] == 'stopped'
+
+
+def test_dmr_stream_mimetype(auth_client):
+    """Stream should return event-stream content type."""
+    resp = auth_client.get('/dmr/stream')
+    assert resp.content_type.startswith('text/event-stream')