Redesign page search input area

+ redefine global search input colors
+ redesign settings page
+ move settings text to a strings module
+ add title and description to now playing settings

src/assets/scss/_variables.scss

@@ -25,7 +25,7 @@ $gray2: rgb(99, 99, 102);
 $gray3: rgb(72, 72, 74);
 $gray4: rgb(58, 58, 60);
 $gray5: rgb(44, 44, 46);
-$body: $gray;
+$body: rgba(0, 0, 0, 0.95);
 
 $red: #ff453a;
 $blue: #0a84ff;