Seed from go-template-repo, renamed to simplexcalc

The template's files at a77fd30, without its history or LICENSE, after
script/rename simplexcalc.

Model: opus-5-5

templates/index.html

@@ -0,0 +1,49 @@
+{{define "title"}}widgets{{end}}
+
+{{define "content"}}
+<h1>{{.AppName}}</h1>
+
+<p>
+    This page is rendered from an embedded template. The stylesheet, the
+    partials in the navigation and footer, and the schema behind the
+    table below all ship inside the binary.
+</p>
+
+<h2>widgets ({{.WidgetCount}})</h2>
+
+<form method="POST" action="/widgets">
+    {{.CSRFField}}
+    <label>
+        name
+        <input type="text" name="name" required maxlength="200" />
+    </label>
+    <label>
+        size
+        <input type="text" name="size" placeholder="4KiB" />
+    </label>
+    <button type="submit">create</button>
+</form>
+
+{{if .Widgets}}
+<table>
+    <thead>
+        <tr>
+            <th>name</th>
+            <th>size</th>
+            <th>created</th>
+        </tr>
+    </thead>
+    <tbody>
+        {{range .Widgets}}
+        <tr>
+            <td>{{.Name}}</td>
+            <td>{{bytes .SizeBytes}}</td>
+            <td>{{since .CreatedAt}}</td>
+        </tr>
+        {{end}}
+    </tbody>
+</table>
+{{else}}
+<p class="empty">No widgets yet.</p>
+{{end}}
+{{end}}