feat: add resilient updates and access controls

internal/web/templates/domain_detail.html

@@ -32,7 +32,7 @@
         <form action="/targets/{{.ID}}/save" method="post" class="target-form" data-target-form data-ipv6-enabled="{{$.Settings.IPv6Enabled}}" data-update-ipv4="{{.UpdateIPv4}}" data-update-ipv6="{{.UpdateIPv6}}">
           <input type="hidden" name="csrf" value="{{$.CSRF}}">
           <div class="toggle-row"><label class="switch"><input type="checkbox" name="active" data-target-active {{if .Active}}checked{{end}}><span></span> DynDNS aktiv</label>{{if $.IsAdmin}}<label class="switch"><input type="checkbox" name="update_ipv4" {{if .UpdateIPv4}}checked{{end}}><span></span> IPv4 / A</label><label class="switch {{if not $.Settings.IPv6Enabled}}switch-disabled{{end}}"><input type="checkbox" name="update_ipv6" {{if and .UpdateIPv6 $.Settings.IPv6Enabled}}checked{{end}} {{if not $.Settings.IPv6Enabled}}disabled{{end}}><span></span> IPv6 / AAAA{{if not $.Settings.IPv6Enabled}} pausiert{{end}}</label>{{end}}</div>
-          <div class="form-grid" data-static-ip-fields {{if .Active}}hidden{{end}} aria-hidden="{{if .Active}}true{{else}}false{{end}}"><label>Feste IPv4 <input name="static_ipv4" data-static-ipv4 value="{{.StaticIPv4}}" inputmode="decimal" placeholder="203.0.113.10" {{if .Active}}disabled{{else if .UpdateIPv4}}required{{else}}disabled{{end}}><small>Pflichtfeld, wenn IPv4 aktiv und DynDNS aus ist.</small></label><label class="{{if not $.Settings.IPv6Enabled}}switch-disabled{{end}}">Feste IPv6 <input name="static_ipv6" data-static-ipv6 value="{{.StaticIPv6}}" inputmode="text" placeholder="2001:db8::10" {{if or .Active (not $.Settings.IPv6Enabled)}}disabled{{else if .UpdateIPv6}}required{{else}}disabled{{end}}><small>Pflichtfeld, wenn IPv6 aktiv und DynDNS aus ist.</small></label></div>
+          <div class="form-grid" data-static-ip-fields {{if .Active}}hidden{{end}} aria-hidden="{{if .Active}}true{{else}}false{{end}}"><label>Feste IPv4 <input name="static_ipv4" data-static-ipv4 data-current-ipv4-placeholder value="{{.StaticIPv4}}" inputmode="decimal" placeholder="{{if $.Settings.LastIPv4}}{{$.Settings.LastIPv4}}{{else}}203.0.113.10{{end}}" {{if .Active}}disabled{{else if .UpdateIPv4}}required{{else}}disabled{{end}}><small>Pflichtfeld, wenn IPv4 aktiv und DynDNS aus ist; grau steht die zuletzt ermittelte aktuelle IPv4.</small></label><label class="{{if not $.Settings.IPv6Enabled}}switch-disabled{{end}}">Feste IPv6 <input name="static_ipv6" data-static-ipv6 value="{{.StaticIPv6}}" inputmode="text" placeholder="2001:db8::10" {{if or .Active (not $.Settings.IPv6Enabled)}}disabled{{else if .UpdateIPv6}}required{{else}}disabled{{end}}><small>Pflichtfeld, wenn IPv6 aktiv und DynDNS aus ist.</small></label></div>
           <p class="target-requirement" data-target-requirement hidden>Trage für jede aktive IP-Familie eine feste Adresse ein oder aktiviere DynDNS.</p>
           <div class="form-grid"><label>Beschreibung <input name="description" value="{{.Description}}" maxlength="512" placeholder="Interne Beschreibung"></label><label>TTL <select name="ttl" required>{{if not (supportedTTL $target.TTL)}}<option value="{{$target.TTL}}" selected>{{$target.TTL}} Sekunden (bestehend)</option>{{end}}{{range ttlOptions}}<option value="{{.}}" {{if eq . $target.TTL}}selected{{end}}>{{.}} Sekunden</option>{{end}}</select></label></div>
           <div class="form-actions"><button class="button button-primary" type="submit">Speichern</button></div>
@@ -106,7 +106,7 @@
 {{if or .IsAdmin .CanCreateTargets}}
 <section class="action-grid admin-actions-grid">
   <article class="panel"><div class="panel-heading"><div><span class="section-label">Record anlegen</span><h2>Neue Subdomain</h2></div></div>
-    <form action="/targets" method="post" class="stacked-form" data-target-form data-ipv6-enabled="{{.Settings.IPv6Enabled}}" data-update-ipv4="true" data-update-ipv6="false"><input type="hidden" name="csrf" value="{{.CSRF}}"><input type="hidden" name="zone_id" value="{{.Zone.ID}}"><label>{{if .IsAdmin}}Name oder Root-Record{{else}}Subdomain{{end}} <input name="record_name" required placeholder="{{if .IsAdmin}}home oder @{{else}}home{{end}}"><small>Die Zone {{.Zone.Name}} wird automatisch ergänzt.</small></label><div class="toggle-row"><label class="switch"><input type="checkbox" name="active" data-target-active checked><span></span> DynDNS aktivieren</label><label class="switch"><input type="checkbox" name="update_ipv4" checked><span></span> IPv4</label><label class="switch {{if not .Settings.IPv6Enabled}}switch-disabled{{end}}"><input type="checkbox" name="update_ipv6" {{if not .Settings.IPv6Enabled}}disabled{{end}}><span></span> IPv6{{if not .Settings.IPv6Enabled}} pausiert{{end}}</label></div><div class="form-grid" data-static-ip-fields hidden aria-hidden="true"><label>Feste IPv4 <input name="static_ipv4" data-static-ipv4 inputmode="decimal" placeholder="203.0.113.10" disabled><small>Pflichtfeld, wenn IPv4 aktiv und DynDNS aus ist.</small></label><label class="{{if not .Settings.IPv6Enabled}}switch-disabled{{end}}">Feste IPv6 <input name="static_ipv6" data-static-ipv6 inputmode="text" placeholder="2001:db8::10" disabled><small>Pflichtfeld, wenn IPv6 aktiv und DynDNS aus ist.</small></label></div><p class="target-requirement" data-target-requirement hidden>Trage für jede aktive IP-Familie eine feste Adresse ein oder aktiviere DynDNS.</p><div class="form-grid"><label>Beschreibung <input name="description" maxlength="512" placeholder="Interne Beschreibung"></label><label>TTL <select name="ttl" required>{{range ttlOptions}}<option value="{{.}}" {{if eq . 60}}selected{{end}}>{{.}} Sekunden</option>{{end}}</select></label></div><button class="button button-primary" type="submit">Record anlegen</button></form>
+    <form action="/targets" method="post" class="stacked-form" data-target-form data-ipv6-enabled="{{.Settings.IPv6Enabled}}" data-update-ipv4="true" data-update-ipv6="false"><input type="hidden" name="csrf" value="{{.CSRF}}"><input type="hidden" name="zone_id" value="{{.Zone.ID}}"><label>{{if .IsAdmin}}Name oder Root-Record{{else}}Subdomain{{end}} <input name="record_name" required placeholder="{{if .IsAdmin}}home oder @{{else}}home{{end}}"><small>Die Zone {{.Zone.Name}} wird automatisch ergänzt.</small></label><div class="toggle-row"><label class="switch"><input type="checkbox" name="active" data-target-active checked><span></span> DynDNS aktivieren</label><label class="switch"><input type="checkbox" name="update_ipv4" checked><span></span> IPv4</label><label class="switch {{if not .Settings.IPv6Enabled}}switch-disabled{{end}}"><input type="checkbox" name="update_ipv6" {{if not .Settings.IPv6Enabled}}disabled{{end}}><span></span> IPv6{{if not .Settings.IPv6Enabled}} pausiert{{end}}</label></div><div class="form-grid" data-static-ip-fields hidden aria-hidden="true"><label>Feste IPv4 <input name="static_ipv4" data-static-ipv4 data-current-ipv4-placeholder inputmode="decimal" placeholder="{{if .Settings.LastIPv4}}{{.Settings.LastIPv4}}{{else}}203.0.113.10{{end}}" disabled><small>Pflichtfeld, wenn IPv4 aktiv und DynDNS aus ist; grau steht die zuletzt ermittelte aktuelle IPv4.</small></label><label class="{{if not .Settings.IPv6Enabled}}switch-disabled{{end}}">Feste IPv6 <input name="static_ipv6" data-static-ipv6 inputmode="text" placeholder="2001:db8::10" disabled><small>Pflichtfeld, wenn IPv6 aktiv und DynDNS aus ist.</small></label></div><p class="target-requirement" data-target-requirement hidden>Trage für jede aktive IP-Familie eine feste Adresse ein oder aktiviere DynDNS.</p><div class="form-grid"><label>Beschreibung <input name="description" maxlength="512" placeholder="Interne Beschreibung"></label><label>TTL <select name="ttl" required>{{range ttlOptions}}<option value="{{.}}" {{if eq . 60}}selected{{end}}>{{.}} Sekunden</option>{{end}}</select></label></div><button class="button button-primary" type="submit">Record anlegen</button></form>
   </article>
   {{if .IsAdmin}}
   <article class="panel"><div class="panel-heading"><div><span class="section-label">Statischer Record</span><h2>Neuen CNAME anlegen</h2></div></div>