Add burst job scheduling, enhance timeline lane management, and improve tooltip functionality

data/static/css/styles.css

@@ -364,7 +364,7 @@ footer {
     min-height: 32px;
     height: calc(var(--lane-count) * var(--lane-height) + 6px);
     padding: 3px 0;
-    overflow: hidden;
+    overflow: visible;
 }
 .gridline {
     position: absolute;
@@ -399,7 +399,6 @@ footer {
     padding: 0 6px;
     display: flex;
     align-items: center;
-    overflow: hidden;
     color: #0f172a;
     font-size: 11px;
     font-weight: 600;
@@ -412,6 +411,8 @@ footer {
     white-space: nowrap;
     overflow: hidden;
     text-overflow: ellipsis;
+    flex: 1;
+    min-width: 0;
 }
 .job-bar-completed { background: rgba(74, 222, 128, 0.85); }
 .job-bar-running   { background: rgba(250, 204, 21, 0.85); }
@@ -491,6 +492,12 @@ footer {
     text-overflow: ellipsis;
 }
 
+.metric-table-scroll {
+    /* Let the table scroll horizontally inside a narrow card instead of
+       spilling out. The card itself stays put. */
+    overflow-x: auto;
+    margin: 0 -4px;
+}
 .metric-table {
     width: 100%;
     border-collapse: collapse;
@@ -500,6 +507,7 @@ footer {
     padding: 6px 6px;
     text-align: right;
     color: #cbd5e1;
+    white-space: nowrap;
 }
 .metric-table thead th {
     color: #94a3b8;
@@ -613,7 +621,7 @@ a.job-bar:hover { filter: brightness(1.1); box-shadow: 0 0 0 1px rgba(255,255,25
     border-radius: 6px;
     height: 56px;
     margin-bottom: 6px;
-    overflow: hidden;
+    overflow: visible;
 }
 .history-dot {
     position: absolute;
@@ -664,3 +672,35 @@ a.job-bar:hover { filter: brightness(1.1); box-shadow: 0 0 0 1px rgba(255,255,25
 }
 .nested-item { display: block; font-size: 13px; }
 .nested-key { color: #94a3b8; margin-right: 6px; }
+
+/* ── Instant CSS tooltip (replaces native title= delay) ── */
+/* Note: do NOT add `position: relative` here — it would override the
+   `position: absolute` on .job-bar / .history-dot. The pseudo-element below
+   positions relative to whichever ancestor is already positioned. */
+[data-tip]::after {
+    content: attr(data-tip);
+    position: absolute;
+    bottom: calc(100% + 6px);
+    left: 50%;
+    transform: translateX(-50%);
+    background: #0f1117;
+    color: #e2e8f0;
+    border: 1px solid #2d2d3a;
+    border-radius: 6px;
+    padding: 6px 9px;
+    font-size: 12px;
+    font-weight: 500;
+    white-space: nowrap;
+    pointer-events: none;
+    opacity: 0;
+    visibility: hidden;
+    z-index: 50;
+    box-shadow: 0 4px 14px rgba(0, 0, 0, 0.5);
+    letter-spacing: 0.01em;
+}
+[data-tip]:hover::after,
+[data-tip]:focus-visible::after {
+    opacity: 1;
+    visibility: visible;
+    transition-delay: 0s;
+}