feat(dashboard): add upcoming EOL + admin operations widgets

Surface operational signal alongside inventory: upcoming-EOL banner and
KPI for everyone; admin-only repairs tempo, FM close time, open FMs by
host, and custody backlog. Service shapes payload by role.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

packages/shared/src/analytics.ts

@@ -27,11 +27,23 @@ export interface PartModelEolSummary {
   deployedCount: number;
 }
 
+export interface OperationsAnalytics {
+  repairs7d: number;
+  repairs30d: number;
+  newFms7d: number;
+  avgFmCloseHours30d: number | null;
+  repairsTrend30d: { date: string; count: number }[];
+  openFmsByHost: { hostId: string; hostName: string; count: number }[];
+  custodyBacklog: { userId: string; username: string; count: number }[];
+}
+
 export interface DashboardAnalytics {
   totalParts: number;
   byState: StateCount[];
   ageBuckets: AgeBucket[];
   topBins: BinCount[];
   deployedPastEol: PartModelEolSummary[];
+  upcomingEol: PartModelEolSummary[];
   openFms: number;
+  operations?: OperationsAnalytics;
 }