feat(sessions): add detail page, Notification component, and session API improvements

- add SessionDetailPage with breadcrumbs, DescriptionList, status badge, masked token
- add Notification component (info/success/error/warning/note variants) for contextual messages
- use Notification for 404 errors on session and environment detail pages
- add GET /sessions/:id endpoint; sanitize token (head…tail) and strip cookies/localStorage
- change DELETE /sessions/:id to return 204 No Content so client redirect works correctly
- add onRowClick prop to Table for clickable rows; stop propagation on actions column
- update status badges: open=success (green), closed=error (red) on both list and detail

client/src/pages/Page.module.css

@@ -36,6 +36,17 @@
   font-size: var(--font-size-sm);
 }
 
+.codeInline {
+  font-family: var(--font-mono, ui-monospace, monospace);
+  font-size: 0.85em;
+  padding: 0.15em 0.45em;
+  background: var(--color-code-bg, color-mix(in srgb, var(--color-bg-raised) 60%, var(--color-secondary) 40%));
+  border: 1px solid var(--color-border);
+  border-radius: var(--radius-sm);
+  color: var(--color-secondary-fg);
+  word-break: break-all;
+}
+
 /* ── Environment cards ──────────────────────────────────────── */
 
 .envGrid {