feat: reports page with formatted daily report cards

frontend/src/style.css

@@ -189,3 +189,102 @@ pre {
   text-transform: uppercase;
   letter-spacing: 0.05em;
 }
+
+.report-intro {
+  color: #9aa4b2;
+  margin-top: -0.5rem;
+}
+
+.reports-table .report-row {
+  cursor: pointer;
+}
+
+.reports-table .report-row:hover,
+.reports-table .report-row:focus {
+  background: #1a2332;
+  outline: none;
+}
+
+.report-summary-cell {
+  max-width: 420px;
+}
+
+.report-card {
+  background: #1a2332;
+  border: 1px solid #2a3441;
+  border-radius: 8px;
+  padding: 1.25rem;
+  margin-bottom: 1rem;
+}
+
+.report-stats {
+  display: grid;
+  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
+  gap: 0.75rem;
+  margin-bottom: 1.25rem;
+}
+
+.report-stat {
+  background: #0f1419;
+  border: 1px solid #2a3441;
+  border-radius: 8px;
+  padding: 0.75rem;
+  text-align: center;
+}
+
+.report-stat-value {
+  font-size: 1.5rem;
+  font-weight: 700;
+  color: #fff;
+}
+
+.report-stat-label {
+  font-size: 0.8rem;
+  color: #9aa4b2;
+  margin-top: 0.25rem;
+}
+
+.report-body-html {
+  line-height: 1.55;
+  font-size: 0.95rem;
+}
+
+.report-body-html .agent-report {
+  white-space: normal;
+}
+
+.report-body-plain {
+  white-space: pre-wrap;
+  word-break: break-word;
+  margin: 0;
+  font-family: inherit;
+  font-size: 0.9rem;
+  background: #0f1419;
+  padding: 1rem;
+  border-radius: 6px;
+  border: 1px solid #2a3441;
+}
+
+.report-empty,
+.report-fallback {
+  color: #9aa4b2;
+}
+
+.report-summary-line {
+  color: #9aa4b2;
+  margin-bottom: 0.75rem;
+}
+
+.report-meta {
+  margin-bottom: 1rem;
+}
+
+.raw-details {
+  margin-top: 1rem;
+}
+
+.raw-details summary {
+  cursor: pointer;
+  color: #9aa4b2;
+  margin-bottom: 0.5rem;
+}