feat: dashboard weighs quality and splits work by a list field

The insights reading adds quality (open bugs per priority, bugs created
and closed per week for 8 weeks, QA returns and passes per area over 90
days, bugs reported in the 14 days after each of the last three
releases) and, for each list custom field, open tickets per option. The
dashboard shows both; the field to split by can be picked.

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

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

@@ -1,3 +1,4 @@
+import { IssuePriority } from './enums';
 import { UserRef } from './models';
 
 /** A ticket the dashboard names, with the number that put it there. */
@@ -102,6 +103,29 @@ export interface BacklogHealth {
   staleDays: number;
 }
 
+/** Bugs (types drawn with the bug icon) and QA. */
+export interface Quality {
+  openBugsByPriority: { priority: IssuePriority; count: number }[];
+  /** The last 8 weeks (Monday), oldest first. */
+  bugWeeks: { week: string; created: number; closed: number }[];
+  /** QA's verdicts per area, the last 90 days (area null: none). */
+  qaByArea: { area: string | null; returned: number; passed: number }[];
+  /** Bugs reported in the 14 days after each of the last releases. */
+  escaped: {
+    releaseId: string;
+    name: string;
+    releasedAt: string;
+    bugs: number;
+  }[];
+}
+
+/** Open tickets per option of a list custom field. */
+export interface FieldBreakdown {
+  fieldId: string;
+  counts: { value: string; count: number }[];
+  none: number;
+}
+
 /** The dashboard's reading of a project beyond the counts. */
 export interface ProjectInsights {
   generatedAt: string;
@@ -114,4 +138,6 @@ export interface ProjectInsights {
   changes: ChangesSince | null;
   team: TeamLoad[];
   backlog: BacklogHealth;
+  quality: Quality;
+  fields: FieldBreakdown[];
 }