Let the filter chips wrap in the desktop incident list

The list pane is 340-420px wide and its chip row scrolled sideways with the
scrollbar hidden. That works by swipe on a phone, but a mouse has nothing to
grab, so Archived (the last chip) could not be reached on a wide screen. In
the desktop layout the row now wraps instead, and the divider between the
status and team chips is hidden there, since it would sit mid-line.

Phones keep the sideways scroll: the rule is inside the min-width: 900px
block.

Claude-Session: https://claude.ai/code/session_01MMados3BD1oSjevHxbmVqU

internal/web/static/app.css

@@ -638,6 +638,10 @@ kbd {
   .view-queue .pane { overflow: auto; height: 100dvh; }
   .pane-list { border-right: 1px solid var(--border); }
   .pane-list .chips { position: sticky; top: 0; z-index: 2; background: var(--bg); padding-top: 16px; }
+  /* The pane is 340-420px wide and a mouse cannot scroll a row whose scrollbar
+     is hidden, so the chips wrap here instead: Archived stays reachable. */
+  .pane-list .chips { flex-wrap: wrap; overflow-x: visible; }
+  .pane-list .chip-sep { display: none; }
   .view-queue:not(.has-detail) .pane-detail { display: block; }
 
   /* On desktop the list stays visible next to the detail. */