Unified Cylinders card on dive details

lib/core/constants/dive_detail_sections.dart

@@ -37,7 +37,7 @@ enum DiveDetailSectionId {
       tide => 'Tide',
       surfaceGps => 'Surface GPS',
       weights => 'Weights',
-      tanks => 'Tanks',
+      tanks => 'Cylinders',
       buddies => 'Buddies',
       signatures => 'Signatures',
       equipment => 'Equipment',
@@ -55,14 +55,14 @@ enum DiveDetailSectionId {
   String get description {
     return switch (this) {
       decoO2 => 'NDL, ceiling, tissue heat map, O2 toxicity',
-      sacSegments => 'Phase/time segmentation, cylinder breakdown',
+      sacSegments => 'Phase/time SAC segmentation',
       details => 'Type, location, trip, dive center, interval',
       environment => 'Air/water temp, visibility, current',
       altitude => 'Altitude value, category, deco requirement',
       tide => 'Tide cycle graph and timing',
       surfaceGps => 'GPS entry/exit points and surface drift',
       weights => 'Weight breakdown, total weight',
-      tanks => 'Tank list, gas mixes, pressures, per-tank SAC',
+      tanks => 'Cylinder list, gas mixes, pressures, MOD/MND, per-tank SAC',
       buddies => 'Buddy list with roles',
       signatures => 'Buddy/instructor signature display and capture',
       equipment => 'Equipment used in dive',

lib/features/dive_log/presentation/providers/gas_analysis_providers.dart

@@ -131,6 +131,3 @@ final isMultiTankDiveProvider = FutureProvider.family<bool, String>((
 
 /// Expanded state for the Gas Analysis section in dive details
 final gasAnalysisSectionExpandedProvider = StateProvider<bool>((ref) => false);
-
-/// Expanded state for the Cylinder SAC subsection
-final cylinderSacExpandedProvider = StateProvider<bool>((ref) => true);