base dashboard and login

web/templates/pages/error.html

@@ -0,0 +1,9 @@
+{{template "base" .}}
+{{define "content"}}
+<div style="display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:60vh;text-align:center">
+  <div style="font-family:'JetBrains Mono',monospace;font-size:64px;font-weight:600;color:var(--threat);line-height:1;margin-bottom:16px">{{.Code}}</div>
+  <div class="page-title" style="margin-bottom:8px">{{.Message}}</div>
+  <div class="page-sub" style="margin-bottom:24px">Something went wrong. Try going back or returning to the dashboard.</div>
+  <a href="/" class="btn-primary">Dashboard</a>
+</div>
+{{end}}