data_model: add NavIC (GNSS id 7) to names, shorts, and colors

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

gui/data_model.py

@@ -16,9 +16,9 @@ from ubx.ubx import frame_create
 
 GNSS_NAMES = {
     0: 'GPS', 1: 'SBAS', 2: 'Galileo', 3: 'BeiDou',
-    4: 'IMES', 5: 'QZSS', 6: 'GLONASS',
+    4: 'IMES', 5: 'QZSS', 6: 'GLONASS', 7: 'NavIC'
 }
-GNSS_SHORT = {0: 'G', 1: 'S', 2: 'E', 3: 'C', 4: 'I', 5: 'J', 6: 'R'}
+GNSS_SHORT = {0: 'G', 1: 'S', 2: 'E', 3: 'C', 4: 'I', 5: 'J', 6: 'R', 7: 'N'}
 GNSS_COLORS = {
     0: '#2196F3',   # GPS – blue
     1: '#9E9E9E',   # SBAS – gray
@@ -27,6 +27,8 @@ GNSS_COLORS = {
     4: '#607D8B',   # IMES – blue-gray
     5: '#9C27B0',   # QZSS – purple
     6: '#F44336',   # GLONASS – red
+    7: '#F4A0A0',   # NavIC – rose
+
 }
 
 LRU_PATH = os.path.expanduser('~/.nmea_client_gui.json')