feat: add support for series

editor/public/static/css/edit.css

@@ -337,6 +337,7 @@ button.improve {
     height: 100%;
     display: flex;
     flex-direction: column;
+    max-width: 30em;
 
     &:not(.show) {
         display: none;
@@ -369,4 +370,44 @@ button.improve {
             padding: 0.4em;
         }
     }
+}
+
+.sep {
+    border-bottom: solid black 1px;
+}
+
+#series-toolbar {
+    display: flex;
+    gap: 0.4em;
+    padding: 0.4em;
+    align-items: center;
+
+    &:not(.show) {
+        display: none;
+    }
+
+    button {
+        background: var(--img);
+        width: 2.4em;
+        height: 2.4em;
+        background-color: transparent;
+        border: none;
+        background-size: 80%;
+        background-position: center;
+        background-repeat: no-repeat;
+        cursor: pointer;
+        border-radius: 0.4em;
+
+        &:hover {
+            background-color: #f1f1f1;
+        }
+
+        &#prev-episode {
+            --img: url("/static/images/prev.svg");
+        }
+        
+        &#next-episode {
+            --img: url("/static/images/next.svg");
+        }
+    }
 }