feat(ui): CheckpointsTable component (replaces row list)

Full-width table with Version / JAR / Deployed-by / Deployed / Strategy /
Outcome columns, pagination cap (jarRetentionCount, default 10), pruned-JAR
archived state, empty state, and row-click onSelect handler. 8/8 tests pass.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

ui/src/pages/AppsTab/AppDeploymentPage/AppDeploymentPage.module.css

@@ -309,3 +309,69 @@
   gap: 8px;
   align-items: center;
 }
+
+/* CheckpointsTable */
+.checkpointsTable {
+  margin-top: 8px;
+}
+.checkpointsTable table {
+  width: 100%;
+  border-collapse: collapse;
+  font-size: 13px;
+}
+.checkpointsTable th {
+  text-align: left;
+  padding: 10px 12px;
+  font-weight: 600;
+  font-size: 11px;
+  text-transform: uppercase;
+  letter-spacing: 0.04em;
+  color: var(--text-muted);
+  background: var(--bg-inset);
+  border-bottom: 1px solid var(--border);
+}
+.checkpointsTable td {
+  padding: 12px;
+  border-top: 1px solid var(--border);
+  vertical-align: top;
+}
+.checkpointsTable tbody tr {
+  cursor: pointer;
+}
+.checkpointsTable tbody tr:hover {
+  background: var(--bg-inset);
+}
+.jarCell { font-family: monospace; font-size: 12px; }
+.jarName { font-family: monospace; }
+.jarStrike { text-decoration: line-through; }
+.archivedHint { font-size: 11px; color: var(--amber, #f59e0b); }
+.isoSubline { font-size: 11px; color: var(--text-muted); }
+.muted { color: var(--text-muted); }
+.strategyPill,
+.outcomePill {
+  display: inline-block;
+  padding: 2px 8px;
+  border-radius: 3px;
+  font-size: 11px;
+  background: var(--bg-inset);
+}
+/* outcome status colors */
+.outcome-STOPPED { color: var(--text-muted); }
+.outcome-DEGRADED {
+  background: var(--amber-bg, rgba(245, 158, 11, 0.18));
+  color: var(--amber, #f59e0b);
+}
+.chevron { color: var(--text-muted); font-size: 14px; text-align: right; }
+.showOlderBtn {
+  width: 100%;
+  padding: 10px;
+  background: transparent;
+  border: 0;
+  color: var(--text-muted);
+  cursor: pointer;
+  font-size: 12px;
+}
+.showOlderBtn:hover {
+  background: var(--bg-inset);
+  color: var(--text-primary);
+}