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/assets/style.css

@@ -43,6 +43,38 @@ header {
 main {
     padding: 0 .5rem;
 
+    .refresh, .loading {
+        font-style: italic;
+        font-size: .9rem;
+    }
+    .htmx-request .refresh {
+        display: none;
+    }
+
+    .loading {
+        display: none;
+    }
+    .htmx-request .loading {
+        display: inline;
+    }
+
+    .user_messages {
+        display: flex;
+        flex-flow: column;
+        justify-content: center;
+    }
+    .user_message {
+        margin: .25rem auto;
+        border: solid 1px navy;
+        border-radius: .5rem;
+        background-color: rgba(255, 255, 255, .75);
+        padding: .25rem;
+    }
+
+    .user_messages + h1 {
+        margin-top: .25rem;
+    }
+
     .item_heading {
         margin-bottom: 0;
     }
@@ -78,7 +110,7 @@ input[type=url],
 input[type=text],
 input[type=email],
 input[type=password] {
-    width: 50%;
+    width: 40%;
     font-size: 1rem;
     padding: .25rem;
     border-radius: .25rem;