feat: saved board views and richer board filters

The board now filters by text, type, priority and unassigned tickets as
well. Any combination can be saved as a named view, private or shared with
the project, and opened again with one click.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

libs/web/tracker/domain/src/lib/models/models.ts

@@ -70,6 +70,29 @@ export interface Epic {
   progress: ChildProgress;
 }
 
+/** What a saved view narrows the board to; empty: everything. */
+export interface SavedFilterCriteria {
+  types?: string[] | null;
+  areas?: string[] | null;
+  priorities?: IssuePriority[] | null;
+  assigneeId?: string | null;
+  unassigned?: boolean | null;
+  releaseId?: string | null;
+  labels?: string[] | null;
+  search?: string | null;
+}
+
+/** A named view of the board: private, or shared with the project. */
+export interface SavedFilter {
+  id: string;
+  projectId: string;
+  owner: UserRef;
+  name: string;
+  shared: boolean;
+  criteria: SavedFilterCriteria;
+  createdAt: string;
+}
+
 /** What boards and lists show. */
 export interface IssueSummary {
   id: string;