add set current date button to blog editor

admin/static/edit-blog.css

@@ -32,6 +32,11 @@ input[type="text"] {
     margin-top: 0;
 }
 
+#blogpost button#set-current-date {
+    margin: 0 .5em;
+    padding: .4em .8em;
+}
+
 #blogpost h2 {
     margin: 0;
     font-size: 2em;

admin/static/edit-blog.js

@@ -1,6 +1,7 @@
 const blogID = document.getElementById("blogpost").dataset.id;
 const titleInput = document.getElementById("title");
 const publishDateInput = document.getElementById("publish-date");
+const setCurrentDateBtn = document.getElementById("set-current-date");
 const descInput = document.getElementById("description");
 const mdInput = document.getElementById("markdown");
 const blueskyActorInput = document.getElementById("bluesky-actor");
@@ -11,6 +12,13 @@ const visInput = document.getElementById("visibility");
 const saveBtn = document.getElementById("save");
 const deleteBtn = document.getElementById("delete");
 
+setCurrentDateBtn.addEventListener("click", () => {
+    let now = new Date;
+    now.setMinutes(now.getMinutes() - now.getTimezoneOffset());
+    publishDateInput.value = now.toISOString().slice(0, 16);
+    saveBtn.disabled = false;
+});
+
 saveBtn.addEventListener("click", () => {
     fetch("/api/v1/blog/" + blogID, {
         method: "PUT",

admin/templates/html/edit-blog.html

@@ -28,6 +28,7 @@
 
         <label for="publish-date">Publish Date</label>
         <input type="datetime-local" name="publish-date" id="publish-date" value="{{.Post.TextPublishDate}}">
+        <button type="button" id="set-current-date">Current date</button>
 
         <label for="description">Description</label>
         <textarea