feat(part-models): detail page with fleet insights

Adds /part-models/:id mirroring host/part detail pattern: KPIs for
units, spend, avg price, failure counts, and FMs implicating the
model, a state-breakdown bar chart, and the parts-of-this-model
table. New GET /part-models/:id/insights aggregates via part.groupBy
+ aggregate and repair/fm counts.

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

apps/web/src/lib/api/part-models.ts

@@ -1,5 +1,6 @@
 import type {
   CreatePartModelRequest,
+  PartModelInsights,
   UpdatePartModelRequest,
 } from '@vector/shared';
 import { api } from './client.js';
@@ -40,3 +41,8 @@ export async function updatePartModel(
 export async function deletePartModel(id: string): Promise<void> {
   await api.delete(`/part-models/${id}`);
 }
+
+export async function getPartModelInsights(id: string): Promise<PartModelInsights> {
+  const res = await api.get<PartModelInsights>(`/part-models/${id}/insights`);
+  return res.data;
+}

apps/web/src/lib/api/parts.ts

@@ -15,6 +15,7 @@ export type PartListFilters = {
   state?: string;
   manufacturerId?: string;
   categoryId?: string;
+  partModelId?: string;
   binId?: string;
   tagId?: string;
   eolOnly?: boolean;

apps/web/src/lib/queryKeys.ts

@@ -73,6 +73,7 @@ export const queryKeys = {
     list: (filters?: Record<string, unknown>) =>
       [...queryKeys.partModels.all, 'list', filters ?? {}] as const,
     detail: (id: string) => [...queryKeys.partModels.all, 'detail', id] as const,
+    insights: (id: string) => [...queryKeys.partModels.all, 'insights', id] as const,
   },
   tags: {
     all: ['tags'] as const,