Implemented an initial version of AqiDistributionChart.

lib/pages/analytics/models/air_quality_data_model.dart

@@ -0,0 +1,31 @@
+import 'package:flutter/material.dart';
+import 'package:syncrow_web/utils/color_manager.dart';
+
+class AirQualityDataModel {
+  const AirQualityDataModel({
+    required this.date,
+    this.aqi,
+    this.pm25,
+    this.pm10,
+    this.hcho,
+    this.tvoc,
+    this.co2,
+  });
+
+  final DateTime date;
+  final double? aqi;
+  final double? pm25;
+  final double? pm10;
+  final double? hcho;
+  final double? tvoc;
+  final double? co2;
+
+  static const Map<String, Color> metricColors = {
+    'aqi': ColorsManager.goodGreen,
+    'pm25': ColorsManager.moderateYellow,
+    'pm10': ColorsManager.poorOrange,
+    'hcho': ColorsManager.unhealthyRed,
+    'tvoc': ColorsManager.severePink,
+    'co2': ColorsManager.hazardousPurple,
+  };
+}