feat: add saved views — database table, CRUD API, migration

- New views table (id, name, filters jsonb, sort_key, is_public, creator_id)
- GET/POST/PATCH/DELETE /views endpoints
- Register views router in server

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

web/src/components/app-shell.tsx

@@ -13,8 +13,8 @@ import {
   PanelLeftIcon,
   CommandIcon,
 } from "lucide-react";
-import { getTickets, getQueues } from "@/lib/api";
-import type { Queue } from "@/lib/types";
+import { getTickets, getQueues, getViews } from "@/lib/api";
+import type { Queue, SavedView } from "@/lib/types";
 import { CommandPalette } from "@/components/command-palette";
 import { ThemeToggle } from "@/components/theme-toggle";
 import { cn } from "@/lib/utils";
@@ -86,6 +86,7 @@ function SidebarNav() {
     recent: 0,
   });
   const [queues, setQueues] = useState<(Queue & { count: number })[]>([]);
+  const [savedViews, setSavedViews] = useState<SavedView[]>([]);
 
   useEffect(() => {
     getTickets().then(({ data }) => {
@@ -115,6 +116,10 @@ function SidebarNav() {
         ).then(setQueues);
       }
     });
+
+    getViews().then(({ data }) => {
+      if (data) setSavedViews(data);
+    });
   }, []);
 
   const collapsed = useSidebarCollapsed();
@@ -198,6 +203,29 @@ function SidebarNav() {
           })}
         </div>
       )}
+
+      {savedViews.length > 0 && (
+        <div className="mt-4">
+          {!collapsed && (
+            <div className="px-2 py-1.5 text-[11px] font-semibold text-sidebar-foreground/45 uppercase">
+              Saved views
+            </div>
+          )}
+          {savedViews.map((view) => {
+            const active =
+              pathname === "/" && searchParams.get("view_id") === view.id;
+            return (
+              <SidebarNavItem
+                key={view.id}
+                href={`/?view_id=${view.id}`}
+                icon={ClockIcon}
+                label={view.name}
+                active={active}
+              />
+            );
+          })}
+        </div>
+      )}
     </>
   );
 }