fix: audit log pagination + full-width table, board card button alignment, light sidebar dither

- Audit log: backend only returns a next cursor when the page is full, so the
  "Load more" button no longer needs two clicks (and hides at the last page).
  Table now spans the full screen width and long detail JSON wraps instead of
  overflowing.
- Bounty board: pin each card's action row to the bottom so "Request
  assignment" lines up across equal-height cards.
- Light theme: restore the Y2K dither texture on the sidebar nav panel.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

web/static/css/app.css

@@ -326,7 +326,6 @@ body[data-nav=side] .topnav .links {
   overflow-y: auto;
   z-index: 40;
 }
-:root[data-theme=light] body[data-nav=side] .topnav .links { background-image: none; }
 body[data-nav=side] .topnav .links a {
   border-bottom: none;
   border-left: 3px solid transparent;
@@ -503,6 +502,22 @@ table.list tbody tr:nth-child(even) { background: color-mix(in srgb, var(--surfa
 
 .grid { display: grid; gap: 18px; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); }
 .grid > .card { display: flex; flex-direction: column; } /* equal-height rows */
+/* pin the action row to the bottom so buttons line up across cards */
+.grid > .card > .spread:last-child { margin-top: auto; }
+
+/* Audit log: span the full screen width; long detail values wrap, never overflow */
+#tab-audit {
+  width: calc(100vw - 32px);
+  margin-left: calc(50% - 50vw + 16px);
+  margin-right: calc(50% - 50vw + 16px);
+}
+body[data-nav=side] #tab-audit {
+  width: calc(100vw - 214px - 32px);
+  margin-left: 0;
+  margin-right: 0;
+}
+#audit-table td, #audit-table th { white-space: normal; overflow-wrap: anywhere; vertical-align: top; }
+#audit-table td:last-child { font-family: var(--font-mono); font-size: 0.82rem; }
 
 /* ---- toolbar: filter rows boxed and baseline-aligned ---- */
 .toolbar {