fix(dashboard): point View link at the live leginfo bill page

The /bill/<session>/<ABn> path now 404s for every bill and hardcoded
'AB', so Senate bills were broken too. Build the link from the canonical
bill_id via the working faces/billNavClient.xhtml?bill_id= endpoint,
which returns 200 for both Assembly and Senate bills. Drop the now-dead
billNum() helper it was the only caller of.

scraper/dashboard/static/app.js

@@ -90,8 +90,10 @@
                 (state.showReason ? " show" : "") + '">'
                 + "Floated: " + parts.join("; ") + "</div>";
         }
-        var url = "https://leginfo.legislature.ca.gov/bill/" +
-            (ev.session || "2025-2026") + "/AB" + billNum(ev);
+        var url = ev.bill_id
+             ? "https://leginfo.legislature.ca.gov/faces/billNavClient.xhtml?bill_id="
+             + encodeURIComponent(ev.bill_id)
+             : "";
         return '<div class="' + cls + '" data-bill="' +
              esc(ev.bill_id) + '">'
              + '<span class="num">' + chip(ev.chamber_origin) +
@@ -112,10 +114,6 @@
              + "</div>";
     }
 
-    function billNum(ev) {
-        var m = (ev.bill_number || "").match(/(\d+)/);
-        return m ? m[1] : "";
-    }
     function esc(s) {
         return String(s == null ? "" : s)
             .replace(/&/g, "&amp;").replace(/</g, "&lt;")