feat: add dashboard CSS styles

cmd/web-ui/static/style.css

@@ -935,3 +935,228 @@ tr.clickable:hover td:first-child {
   color: var(--text-dim);
   border: 1px solid var(--border);
 }
+
+/* ── Dashboard ────────────────────────────────────────────── */
+.dashboard-summary {
+  display: grid;
+  grid-template-columns: repeat(4, 1fr);
+  gap: 1rem;
+  margin-bottom: 1.5rem;
+}
+
+@media (max-width: 900px) {
+  .dashboard-summary {
+    grid-template-columns: repeat(2, 1fr);
+  }
+}
+
+@media (max-width: 500px) {
+  .dashboard-summary {
+    grid-template-columns: 1fr;
+  }
+}
+
+.summary-card {
+  background: var(--surface);
+  border: 1px solid var(--border);
+  border-radius: var(--radius-lg);
+  padding: 1.125rem 1.25rem;
+  transition: border-color 0.2s;
+}
+
+.summary-card:hover {
+  border-color: rgba(34, 211, 238, 0.18);
+}
+
+.summary-card-label {
+  font-size: 0.68rem;
+  font-weight: 700;
+  color: var(--text-dim);
+  text-transform: uppercase;
+  letter-spacing: 0.1em;
+  margin-bottom: 0.5rem;
+}
+
+.summary-card-value {
+  font-family: var(--font-display);
+  font-size: 2rem;
+  font-weight: 800;
+  color: var(--text-bright);
+  letter-spacing: -0.02em;
+  line-height: 1;
+}
+
+.summary-card-value.has-errors {
+  color: var(--error);
+}
+
+.summary-card-sub {
+  font-size: 0.72rem;
+  color: var(--text-dim);
+  margin-top: 0.35rem;
+  font-family: var(--font-mono);
+}
+
+.charts-row {
+  display: grid;
+  grid-template-columns: 1fr 320px;
+  gap: 1.25rem;
+  margin-bottom: 1.5rem;
+}
+
+@media (max-width: 900px) {
+  .charts-row {
+    grid-template-columns: 1fr;
+  }
+}
+
+.chart-panel {
+  background: var(--surface);
+  border: 1px solid var(--border);
+  border-radius: var(--radius-lg);
+  padding: 1.25rem;
+  min-height: 280px;
+}
+
+.chart-header {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  margin-bottom: 1rem;
+}
+
+.chart-title {
+  font-family: var(--font-display);
+  font-size: 0.88rem;
+  font-weight: 700;
+  color: var(--text-bright);
+  letter-spacing: 0.01em;
+}
+
+.window-selector {
+  display: flex;
+  gap: 0;
+  border: 1px solid var(--border);
+  border-radius: var(--radius);
+  overflow: hidden;
+}
+
+.window-btn {
+  background: transparent;
+  border: none;
+  color: var(--text-dim);
+  font-family: var(--font-mono);
+  font-size: 0.7rem;
+  font-weight: 600;
+  padding: 0.3rem 0.65rem;
+  cursor: pointer;
+  letter-spacing: 0.04em;
+  transition: background 0.15s, color 0.15s;
+  border-right: 1px solid var(--border);
+}
+
+.window-btn:last-child {
+  border-right: none;
+}
+
+.window-btn:hover {
+  color: var(--text-bright);
+  background: var(--surface-2);
+}
+
+.window-btn.active {
+  color: var(--accent);
+  background: var(--accent-dim);
+}
+
+.chart-container {
+  width: 100%;
+  min-height: 200px;
+}
+
+.fw-bars {
+  display: flex;
+  flex-direction: column;
+  gap: 0.75rem;
+  margin-top: 0.25rem;
+}
+
+.fw-bar-row {
+  display: flex;
+  flex-direction: column;
+  gap: 0.3rem;
+}
+
+.fw-bar-label {
+  display: flex;
+  justify-content: space-between;
+  align-items: center;
+}
+
+.fw-bar-name {
+  font-family: var(--font-mono);
+  font-size: 0.78rem;
+  color: var(--text);
+}
+
+.fw-bar-count {
+  font-family: var(--font-mono);
+  font-size: 0.72rem;
+  color: var(--text-dim);
+}
+
+.fw-bar-track {
+  height: 6px;
+  background: var(--surface-2);
+  border-radius: 3px;
+  overflow: hidden;
+}
+
+.fw-bar-fill {
+  height: 100%;
+  border-radius: 3px;
+  transition: width 0.4s ease;
+}
+
+.fw-bar-fill.openclaw { background: var(--accent); }
+.fw-bar-fill.claude-code { background: var(--success); }
+.fw-bar-fill.opencode { background: var(--purple); }
+.fw-bar-fill.unknown { background: var(--text-dim); }
+
+.bottom-panels {
+  display: grid;
+  grid-template-columns: 1fr 320px;
+  gap: 1.25rem;
+}
+
+@media (max-width: 900px) {
+  .bottom-panels {
+    grid-template-columns: 1fr;
+  }
+}
+
+.feed-panel {
+  background: var(--surface);
+  border: 1px solid var(--border);
+  border-radius: var(--radius-lg);
+  padding: 1.25rem;
+  max-height: 480px;
+  overflow-y: auto;
+}
+
+.feed-panel .timeline-event {
+  padding: 0.625rem 0.875rem;
+  border-radius: var(--radius);
+  margin-bottom: 0.375rem;
+  border: 1px solid var(--border-soft);
+  background: transparent;
+}
+
+.tools-panel {
+  background: var(--surface);
+  border: 1px solid var(--border);
+  border-radius: var(--radius-lg);
+  padding: 1.25rem;
+}
+
+.uplot .u-legend { display: none; }