Extract CSS/JS to static files, wrap header pills, add version footer

The palette lived in a :root block duplicated across all three
templates, so every reshade meant three edits — and drifted twice in
practice (the favicon hardcoded its own hex; stale danger-border rgba
literals survived two palette changes). Move tokens to a single
static/css/base.css, derive every dim/border tint from the four source
hues with color-mix, and point the favicon at one static/favicon.svg.

Also splits the 1558-line dashboard.html into template + static assets:
662 lines of CSS and 396 of JS were re-sent uninlined on every load
with no browser caching, which costs real time on the remote/cellular
access this app is built for. Templates drop to 501/42/107 lines.
Server-rendered config (timezone, script_root) now arrives via
<body data-*>; wiring URL_BASE to request.script_root also fixes /api/*
fetches for a future subpath mount, which the hardcoded "" would break.

Header service pills now wrap instead of scrolling — they were clipped
at narrow widths, and a hidden pill is a service whose status you
cannot see. Verified 0 clipped and no page overflow at 320/375/700/1280.

Footer gains a version and date so the running build is identifiable
without trusting the Unraid Docker tab's cached container IDs.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

static/css/settings.css

@@ -0,0 +1,138 @@
+/* Settings page — tokens and base reset come from base.css */
+
+header {
+  background: var(--surface);
+  border-bottom: 1px solid var(--border);
+  padding: 0.75rem 1.5rem;
+  display: flex;
+  align-items: center;
+  gap: 0.65rem;
+  position: sticky;
+  top: 0;
+  z-index: 100;
+}
+header h1 {
+  margin: 0;
+  font-size: var(--fs-lg);
+  font-weight: 600;
+  letter-spacing: -0.01em;
+}
+.back-btn {
+  margin-left: auto;
+  display: inline-flex;
+  align-items: center;
+  min-height: var(--tap);
+  padding: 0 0.9rem;
+  background: var(--surface-2);
+  border: 1px solid var(--border);
+  border-radius: var(--radius-sm);
+  color: var(--text-2);
+  font-size: var(--fs-sm);
+  text-decoration: none;
+  white-space: nowrap;
+  transition: color 0.2s, border-color 0.2s;
+}
+.back-btn:hover { color: var(--text); border-color: var(--border-lt); }
+
+main { padding: 1.5rem; max-width: 900px; margin: 0 auto; }
+
+.grid {
+  display: grid;
+  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
+  gap: var(--gap);
+}
+.full { grid-column: 1 / -1; }
+
+.card {
+  background: var(--surface);
+  border: 1px solid var(--border);
+  border-radius: var(--radius);
+}
+.card-header {
+  padding: 0.85rem 1.1rem;
+  border-bottom: 1px solid var(--border);
+}
+.card-header h2 {
+  margin: 0;
+  font-size: var(--fs-sm);
+  font-weight: 600;
+}
+.card-body { padding: 1.1rem; }
+
+.field { margin-bottom: 0.9rem; }
+label {
+  display: block;
+  font-size: var(--fs-xs);
+  font-weight: 600;
+  color: var(--text-2);
+  margin-bottom: 0.35rem;
+}
+input, select {
+  width: 100%;
+  min-height: var(--tap);
+  padding: 0 0.8rem;
+  background: var(--surface-2);
+  border: 1px solid var(--border);
+  border-radius: var(--radius-sm);
+  color: var(--text);
+  font-family: inherit;
+  font-size: 16px; /* prevents iOS zoom on focus */
+  outline: none;
+  transition: border-color 0.2s;
+}
+input:focus, select:focus { border-color: var(--accent); }
+input::placeholder { color: var(--text-3); }
+
+.hint {
+  font-size: var(--fs-xs);
+  color: var(--text-3);
+  margin-top: 0.35rem;
+}
+
+button.save {
+  width: 100%;
+  min-height: var(--tap);
+  background: var(--accent);
+  color: var(--bg);
+  border: none;
+  border-radius: var(--radius-sm);
+  font-family: inherit;
+  font-size: var(--fs-sm);
+  font-weight: 600;
+  cursor: pointer;
+  transition: opacity 0.15s;
+}
+button.save:hover:not(:disabled) { opacity: 0.88; }
+button.save:disabled { background: var(--border); color: var(--text-3); cursor: default; }
+
+.error-inline {
+  font-size: var(--fs-xs);
+  color: var(--danger);
+  display: none;
+  margin-top: 0.35rem;
+}
+
+.toast {
+  position: fixed;
+  bottom: 1.5rem;
+  right: 1.5rem;
+  background: var(--surface);
+  border: 1px solid var(--ok);
+  color: var(--ok);
+  padding: 0.7rem 1.1rem;
+  border-radius: var(--radius-sm);
+  font-size: var(--fs-sm);
+  font-weight: 500;
+  opacity: 0;
+  transition: opacity 0.3s;
+  pointer-events: none;
+  max-width: calc(100vw - 3rem);
+}
+.toast.error { border-color: var(--danger); color: var(--danger); }
+.toast.show { opacity: 1; }
+
+@media (max-width: 600px) {
+  header { padding: 0.7rem 1rem; }
+  main { padding: 1rem; }
+  .toast { left: 1rem; right: 1rem; bottom: 1rem; }
+}