Fix Redirect Hosts empty-state flash and implicit-submit save crash

- Redirect Hosts' "Create your first redirect" panel now hides during
  the loading window on refresh, matching Hosted Sites/Proxy Hosts
  instead of staying visible the whole time (or briefly showing the
  wrong empty state when redirects do exist)
- Fix a crash when any dialog (Hosted Site, Proxy Host, User, Password,
  or the shared settings dialog) is submitted implicitly, e.g. by
  pressing Enter in a field instead of clicking the button.
  event.submitter is null in that case, which threw on
  `button.disabled = true` before the save request was ever sent,
  silently dropping the whole save with no visible error. Added a
  resolveSubmitter() fallback that finds the dialog's real submit
  button when event.submitter is null.
- Bump version to 0.11.32

src/public/index.html

@@ -144,7 +144,7 @@
         <section data-admin-panel="security" class="hidden settings-panel"><h2>Security, health & updates</h2><div class="role-callout"><strong>Configuration safety</strong><span>Site Gateway validates generated Caddy configuration before every reload and retains the active configuration when validation fails.</span><strong>Container updates</strong><span>Updates are installed by pulling a new pinned image. Create a backup before changing versions.</span></div><section class="support-panel"><div><p class="eyebrow">Troubleshooting & support</p><h3>Gateway diagnostics</h3><p class="muted">Run checks and download a redacted report when you need to investigate a gateway issue.</p></div><div class="row-actions"><button id="download-support" class="button secondary admin-only">Download support report</button></div><p class="muted support-note">The report includes version, configuration health, certificate readiness, upstream checks, and recent events. Passwords, private keys, session secrets, cookies, and certificate contents are excluded.</p></section><form id="health-settings-form" class="settings-form"><label>Renewing-soon warning<input name="warningDays" type="number" min="8" max="120" value="30"><small>Days remaining before a certificate is highlighted.</small></label><label>Critical warning<input name="criticalDays" type="number" min="1" max="119" value="7"><small>Must be lower than the renewing-soon threshold.</small></label><label>Stale health data<input name="staleMinutes" type="number" min="2" max="1440" value="10"><small>Minutes before a displayed check is considered old.</small></label><div class="dialog-actions"><button class="button primary">Save health settings</button></div></form></section>
         <section data-admin-panel="danger" class="hidden settings-panel danger-zone"><h2>Danger Zone</h2><p class="muted">These actions can permanently remove Site Gateway data. Review each warning carefully before continuing.</p><div class="danger-card"><p class="eyebrow">Restore defaults</p><h3>Reset gateway preferences</h3><p>Restore default site behavior, backup scheduling, certificate thresholds, and interface preferences. Your users, routes, certificates, logs, and backups remain intact.</p><button id="restore-defaults" class="button secondary">Restore default settings</button></div><div class="danger-card destructive"><p class="eyebrow">Permanent action</p><h3>Factory reset</h3><p>Deletes all Site Gateway data under <code>/data</code>, including users, routes, certificates, logs, backups, and settings. Docker-mounted files outside <code>/data</code> are not affected. The container restarts at first-install setup.</p><form id="factory-reset-form" class="danger-form"><label>Administrator username<input name="username" autocomplete="username" required></label><label>Administrator password<input name="password" type="password" autocomplete="current-password" required></label><label>Type <strong>FACTORY RESET</strong> to confirm<input name="confirmation" required autocomplete="off"></label><p id="factory-reset-error" class="error"></p><div class="danger-actions"><button class="button secondary" type="button" id="factory-reset-cancel">Cancel</button><button class="button danger" type="submit">Erase all data and reset</button></div></form></div></section>
       </section>
-      <section id="redirects-view" class="feature-view hidden"><div id="redirect-list" class="site-grid"></div><section id="redirect-empty" class="empty"><div class="empty-icon">↪</div><h2>Create your first redirect</h2><p>Send an old domain to a new destination while preserving its path if you choose.</p><button class="button primary create-trigger">Create a redirect host</button></section></section>
+      <section id="redirects-view" class="feature-view hidden"><div id="redirect-list" class="site-grid"></div><section id="redirect-empty" class="empty hidden"><div class="empty-icon">↪</div><h2>Create your first redirect</h2><p>Send an old domain to a new destination while preserving its path if you choose.</p><button class="button primary create-trigger">Create a redirect host</button></section></section>
       <section id="access-view" class="feature-view hidden"><div id="access-list" class="data-list"></div></section>
       <section id="documentation-view" class="feature-view hidden docs"><div class="docs-intro"><p class="eyebrow">Site Gateway manual</p><h2>Simple routing for homelabs and small teams</h2><p>A complete guide to publishing sites, routing applications, securing domains, and recovering safely. Start with the defaults, then use the advanced controls when you understand the trade-offs.</p><div class="docs-search-panel"><label class="doc-search"><span>Search the complete manual</span><input id="doc-search" type="search" placeholder="Search “upstream TLS”, “Plex”, “CIDR”, “backup”, or any field name"></label><small>Searches purpose, fields, examples, troubleshooting, and expert notes.</small></div></div><div class="docs-layout"><aside class="docs-nav" aria-label="Documentation sections"><p class="eyebrow">Contents</p><button data-doc-jump="introduction">Introduction</button><button data-doc-jump="dashboard">Dashboard</button><button data-doc-jump="hosted">Hosted Sites</button><button data-doc-jump="proxy">Proxy Hosts</button><button data-doc-jump="redirect">Redirect Hosts</button><button data-doc-jump="certificate">Certificates</button><button data-doc-jump="logs">Logs</button><button data-doc-jump="access">Access Lists</button><button data-doc-jump="administration">Administration</button><button data-doc-jump="backup">Backup & Restore</button><button data-doc-jump="danger">Danger Zone</button><button data-doc-jump="common">Common Controls</button></aside><div id="docs-content">
         <article data-doc="introduction why built philosophy caddy novice expert"><p class="eyebrow">Introduction</p><h2>Why Site Gateway exists</h2><p>Reverse proxies often expose powerful settings without explaining what they change. Site Gateway provides a visual, Caddy-powered control plane for static sites, proxy routes, redirects, HTTPS, health checks, access control, and recovery.</p><h3>Novice path</h3><p>Create one route, test it locally, then add a domain and TLS. Keep defaults until you have a reason to change them.</p><h3>Expert note</h3><p>Configuration is stored in SQLite under <code>/data</code> and generated Caddy configuration is validated before reload.</p><h3>Example</h3><p>Publish a ZIP on a direct port first, then add <code>www.example.com</code> after DNS and port forwarding are ready.</p></article>