migrate app from svelte

templates/components/picture.html

@@ -0,0 +1,29 @@
+{% macro picture(src, caption, alt_text="a picture of my cute dog") -%}
+
+<style>
+    .picture {
+        margin: 0px;
+        margin-bottom: 10px;
+    }
+
+    .picture img {
+        max-width: 100%;
+        width: auto;
+        border: 1px solid #eeeeeea0;
+        border-radius: 4px;
+        box-shadow: 0px 0px 8px #12181b;
+    }
+
+    .picture p {
+        margin: 0;
+        margin-top: 5px;
+    }
+</style>
+
+<div class="main-panel picture">
+	<img src={{src}} alt={{alt_text}} style="height: calc(100% - ({{(caption|length / 28) | round(0, 'ceil') | int * 32}} px)">
+    {% if caption %}
+      <p>{{caption}}</p>
+    {% endif %}
+</div>
+{%- endmacro %}