Make title column greedy when other columns are hidden

Removes inline max-width/nowrap from title td, moves to CSS with
width:99% so the title column absorbs all available space freed by
hiding other columns. max-width:0 trick ensures overflow ellipsis
still works correctly.

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

assets/css/dashboard.css

@@ -8,6 +8,16 @@
   margin-bottom: 1rem;
 }
 
+/* ── Title column: greedy — absorbs freed space when cols hidden ─ */
+#tickets-table th[data-col="title"],
+#tickets-table td.col-title {
+  width: 99%;
+  max-width: 0;          /* lets overflow:hidden + ellipsis work */
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+
 /* ── Column toggle panel ─────────────────────────────────────── */
 .col-toggle-panel {
   position: absolute;