[CHORE] fix some code smell and increasing coverage

lib/config/styles.dart

@@ -2,7 +2,6 @@ import 'package:flutter/material.dart';
 
 final Color greenPrimary = Color(0xff3A903A);
 final Color redPrimary = Color(0xffC60000);
-final Color bluePrimary = Color(0xff537AC6);
 
 final double smallSpace = 4.0;
 final double regularSpace = 8.0;

lib/page/filter & fasilitas/fasilitas.dart

@@ -89,7 +89,7 @@ class _FasilitasState extends State<Fasilitas> {
                     disabledTextColor: Colors.black,
                     padding: EdgeInsets.all(8),
                     shape: RoundedRectangleBorder(
-                        borderRadius: BorderRadius.circular(10),
+                        borderRadius: regularBorderRadius,
                         side: BorderSide(color: Colors.transparent)),
                     splashColor: Colors.lightGreen,
                     onPressed: () {
@@ -125,7 +125,7 @@ class _FasilitasState extends State<Fasilitas> {
                         disabledTextColor: Colors.black,
                         padding: EdgeInsets.all(8),
                         shape: RoundedRectangleBorder(
-                            borderRadius: BorderRadius.circular(10),
+                            borderRadius: regularBorderRadius,
                             side: BorderSide(color: Colors.transparent)),
                         splashColor: Colors.lightGreen,
                         onPressed: () {
@@ -194,13 +194,13 @@ class _FasilitasState extends State<Fasilitas> {
                                       ],
                                     )),
                                 Icon(Icons.thumb_down,
-                                    color: Colors.red[800], size: 20),
+                                    color: redPrimary, size: 20),
                                 Text(
                                   '1 tidak suka',
                                   style: TextStyle(
                                     fontSize: 12,
                                     fontWeight: FontWeight.w600,
-                                    color: Colors.red[800],
+                                    color: redPrimary,
                                   ),
                                 ),
                               ],