Upgrade dashboard, builder, and agent resource controls.

Dark UI with hashrate graphs, inline setting help, percent-based threads/RAM, configurable process name and display modes, and LAN-aware run.bat startup banner.

server/web/src/pages/Pages.css

@@ -614,3 +614,81 @@
   margin-top: 0.5rem;
   margin-bottom: 0.5rem;
 }
+
+.page-subtitle {
+  color: var(--text-muted);
+  font-size: 0.875rem;
+  margin-top: 0.25rem;
+}
+
+.chart-row {
+  margin-bottom: 1.5rem;
+}
+
+.chart-wrap {
+  width: 100%;
+}
+
+.chart-title {
+  font-size: 0.9375rem;
+  margin-bottom: 0.75rem;
+  color: var(--text-secondary);
+}
+
+.chart-empty {
+  min-height: 260px;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  color: var(--text-muted);
+}
+
+.builder-layout-wide {
+  grid-template-columns: 320px 1fr;
+}
+
+@media (max-width: 1100px) {
+  .builder-layout-wide {
+    grid-template-columns: 1fr;
+  }
+}
+
+.cheat-sheet-panel {
+  align-self: start;
+  position: sticky;
+  top: 1rem;
+}
+
+.stat-card.accent-cyan { border-top: 3px solid var(--accent-cyan); }
+.stat-card.accent-green { border-top: 3px solid var(--accent-green); }
+.stat-card.accent-purple { border-top: 3px solid var(--accent-purple); }
+.stat-card.accent-yellow { border-top: 3px solid var(--accent-yellow); }
+
+.agent-card.detailed .agent-detail-lines {
+  display: grid;
+  grid-template-columns: 1fr;
+  gap: 0.5rem;
+  margin-top: 1rem;
+}
+
+.agent-detail-lines div {
+  display: flex;
+  justify-content: space-between;
+  gap: 1rem;
+  font-size: 0.8125rem;
+  padding: 0.35rem 0;
+  border-bottom: 1px solid rgba(42, 58, 92, 0.5);
+}
+
+.agent-detail-lines span {
+  color: var(--text-muted);
+}
+
+.agent-detail-lines strong {
+  color: var(--text-primary);
+  text-align: right;
+}
+
+.table-card {
+  overflow-x: auto;
+}