Add no purge, manual delete options (#12)

- Add htmx, hx attributes
- Only add/update items since last check
- Move messages to session to persist across redirects
- Polish styles a bit (still WIP)

src/public/index.php

@@ -32,13 +32,17 @@ $query->bindValue(':userId', $_SESSION[Key::USER_ID]);
 $result = $query->execute();
 $item   = $result ? $result->fetchArray(SQLITE3_ASSOC) : false;
 
-page_head('Welcome'); ?>
-<h1>Your Unread Items &nbsp; <a href=/?refresh><small><small><em>(Refresh All Feeds)</em></small></small></a></h1>
+page_head('Your Unread Items'); ?>
+<h1>
+    Your Unread Items &nbsp;
+    <a class=refresh href=/?refresh hx-get=/?refresh hx-indicator="closest h1">(Refresh All Feeds)</a>
+    <span class=loading>Refreshing&hellip;</span>
+</h1>
 <article><?php
 if ($item) {
     while ($item) { ?>
-        <p><a href=/item?id=<?=$item['id']?>><?=strip_tags($item['item_title'])?></a><br>
-            <?=htmlentities($item['feed_title'])?><br><small><em><?=date_time($item['as_of'])?></em></small><?php
+        <p><a href=/item?id=<?=$item['id']?> hx-get=/item?id=<?=$item['id']?>><?=strip_tags($item['item_title'])?></a>
+            <br><?=htmlentities($item['feed_title'])?><br><small><em><?=date_time($item['as_of'])?></em></small><?php
         $item = $result->fetchArray(SQLITE3_ASSOC);
     }
 } else { ?>