fix(webui): render correct page at / (dashboard), use base template execution; footer centering, navbar layout via CSS

internal/httpapi/templates.go

@@ -43,5 +43,5 @@ func (s *Server) render(w http.ResponseWriter, name string, data map[string]any)
 		data["Title"] = strings.Title(base)
 	}
 	w.Header().Set("Content-Type", "text/html; charset=utf-8")
-	_ = tpl.ExecuteTemplate(w, name, data)
+	_ = tpl.ExecuteTemplate(w, base, data)
 }

internal/httpapi/templates/layout.tmpl

@@ -19,7 +19,7 @@
       </ul>
     </nav>
   </header>
-  {{ block "content" . }}{{ end }}
+  {{ template .Content . }}
   <footer><small>{{ .Version }} ({{ .Commit }})</small></footer>
 </body>
 </html>