frontend-foundation: GOAT front-end Phase 1 — auth, tag management, public tag page (22/22 spec scenarios pass)

frontend/templates/account-panel.html

@@ -0,0 +1,16 @@
+{{define "account-panel"}}
+<div id="account-panel">
+  {{if .AddError}}<p class="mt-4 rounded border border-red-200 bg-red-50 px-4 py-2 text-sm text-red-700">{{.AddError}}</p>{{end}}
+
+  <div class="mt-4 rounded-xl border border-stone-200 bg-white p-4 shadow-sm">
+    <form hx-post="/account/tags" hx-target="#account-panel" hx-swap="outerHTML" class="flex gap-2">
+      <input name="tag_code" type="text" placeholder="Enter tag code (e.g. TEST000001)" class="flex-1 rounded border border-stone-300 px-3 py-2 text-sm" required>
+      <button type="submit" class="rounded bg-stone-900 px-4 py-2 text-sm font-semibold text-white hover:bg-stone-700">Add tag</button>
+    </form>
+  </div>
+
+  <div id="tag-list">
+    {{template "tag-list" .Tags}}
+  </div>
+</div>
+{{end}}