feat: add community VFKD threshold profile as alternative to official spec profile

Users who prefer the more lenient community-derived thresholds from
vodafonekabelforum.de can switch to this profile in Settings > Appearance.
The default VFKD profile now uses the official Vodafone pNTP spec v1.06.

Author: itsDNNS

app/modules/thresholds_vfkd/manifest.json

@@ -1,7 +1,7 @@
 {
   "id": "docsight.thresholds_vfkd",
   "name": "VFKD Thresholds",
-  "description": "Signal thresholds based on Vodafone Kabel Deutschland (VFKD) community guidelines",
+  "description": "Signal thresholds based on the official Vodafone pNTP Interface Specification v1.06",
   "version": "1.0.0",
   "author": "itsDNNS",
   "minAppVersion": "2026.2",

app/modules/thresholds_vfkd_community/manifest.json

@@ -0,0 +1,12 @@
+{
+  "id": "docsight.thresholds_vfkd_community",
+  "name": "VFKD Thresholds (Community)",
+  "description": "Community-derived signal thresholds for Vodafone Kabel Deutschland, based on vodafonekabelforum.de guidelines. More lenient than the official spec.",
+  "version": "1.0.0",
+  "author": "itsDNNS",
+  "minAppVersion": "2026.2",
+  "type": "driver",
+  "contributes": {
+    "thresholds": "thresholds.json"
+  }
+}

app/modules/thresholds_vfkd_community/thresholds.json

@@ -0,0 +1,41 @@
+{
+  "_meta": {
+    "region": "Germany",
+    "operator": "Vodafone Kabel Deutschland",
+    "docsis_variant": "eurodocsis",
+    "source": "https://vodafonekabelforum.de/viewtopic.php?t=39941",
+    "notes": "Community-derived thresholds from the Vodafone Kabel Forum. More lenient than the official Vodafone pNTP spec. All power values in dBmV, SNR/MER in dB."
+  },
+
+  "downstream_power": {
+    "_default": "256QAM",
+    "64QAM":   { "good": [-9.9, 7.0],   "warning": [-11.9, 12.0], "critical": [-14.0, 14.0] },
+    "256QAM":  { "good": [-3.9, 13.0],  "warning": [-5.9, 18.0],  "critical": [-8.0, 20.0] },
+    "1024QAM": { "good": [-1.9, 15.0],  "warning": [-3.9, 20.0],  "critical": [-6.0, 22.0] },
+    "4096QAM": { "good": [-1.9, 15.0],  "warning": [-3.9, 20.0],  "critical": [-6.0, 22.0] }
+  },
+
+  "upstream_power": {
+    "_default": "sc_qam",
+    "sc_qam": { "good": [41.1, 47.0], "warning": [37.1, 51.0], "critical": [35.0, 53.0] },
+    "ofdma":  { "good": [44.1, 47.0], "warning": [40.1, 48.0], "critical": [38.0, 50.0] }
+  },
+
+  "snr": {
+    "_default": "256QAM",
+    "64QAM":   { "good_min": 27.0, "warning_min": 25.0, "critical_min": 24.0 },
+    "256QAM":  { "good_min": 33.0, "warning_min": 31.0, "critical_min": 30.0 },
+    "1024QAM": { "good_min": 39.0, "warning_min": 37.0, "critical_min": 36.0 },
+    "4096QAM": { "good_min": 40.0, "warning_min": 38.0, "critical_min": 36.0 }
+  },
+
+  "upstream_modulation": {
+    "critical_max_qam": 4,
+    "warning_max_qam": 16
+  },
+
+  "errors": {
+    "uncorrectable_pct": { "warning": 1.0, "critical": 3.0 },
+    "spike_expiry_hours": 48
+  }
+}

tests/test_analyzer.py

@@ -144,9 +144,9 @@ def test_snr_tolerated(self):
 
 class TestHealthMarginal:
     def test_ds_power_marginal(self):
-        """DS power 19 dBmV is marginal (between warn_max 18 and crit_max 20)."""
+        """DS power 15.5 dBmV is marginal (between warn_max 15 and crit_max 16)."""
         data = _make_data(
-            ds30=[_make_ds30(1, power=19.0, mse="-35")],
+            ds30=[_make_ds30(1, power=15.5, mse="-35")],
             us30=[_make_us30(1, power=44.0)],
         )
         result = analyze(data)
@@ -753,7 +753,7 @@ def test_error_threshold_percent(self):
     def test_fallback_when_empty(self):
         analyzer._thresholds = {}
         t = analyzer._get_ds_power_thresholds("256QAM")
-        assert t["good_min"] == -3.9  # fallback value
+        assert t["good_min"] == -4.0  # fallback value (Vodafone pNTP spec v1.06)
 
 
 class TestOFDMAUpstream: