FEAT: darkmode (#155)

* darkmode fixes

* fix: darkmode: empty beats in active/ hovered state

* fix: color for empty beats

* fix: navbar background color

* Update src/assets/vars.scss

Co-authored-by: Adam Stachowicz <saibamenppl@gmail.com>

* Update src/assets/app.scss

Co-authored-by: Adam Stachowicz <saibamenppl@gmail.com>

* wip, split dark theme style by .dark and store light theme to normal

* add back missing css

* working switch theme button and tuning dark theme

* finish dark theme

Co-authored-by: Adam Stachowicz <saibamenppl@gmail.com>
Co-authored-by: LouisLam <louislam@users.noreply.github.com>

src/pages/Dashboard.vue

@@ -89,7 +89,7 @@ export default {
 }
 </script>
 
-<style scoped lang="scss">
+<style lang="scss" scoped>
 @import "../assets/vars.scss";
 
 .container-fluid {
@@ -133,4 +133,18 @@ export default {
     padding-right: 5px !important;
 }
 
+.dark {
+    .list {
+        .item {
+            &:hover {
+                background-color: $dark-bg2;
+            }
+
+            &.active {
+                background-color: $dark-bg2;
+            }
+        }
+    }
+}
+
 </style>