fix: remove lingering FM references from insights services

tx.fm.count calls + fmsImplicating fields were missed in the main FM
removal pass. Drops the field from Category/Manufacturer/PartModel
insights types, services, tests, and detail-page stat cards.

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

apps/web/src/pages/CategoryDetail.tsx

@@ -270,9 +270,9 @@ export default function CategoryDetail() {
         </div>
       </div>
 
-      <div className="grid gap-4 sm:grid-cols-2 lg:grid-cols-3 xl:grid-cols-6">
+      <div className="grid gap-4 sm:grid-cols-2 lg:grid-cols-3 xl:grid-cols-5">
         {insightsQuery.isPending || !insights ? (
-          Array.from({ length: 6 }).map((_, i) => <Skeleton key={i} className="h-20" />)
+          Array.from({ length: 5 }).map((_, i) => <Skeleton key={i} className="h-20" />)
         ) : (
           <>
             <StatCard label="MPNs" value={insights.totalPartModels.toLocaleString()} />
@@ -300,10 +300,6 @@ export default function CategoryDetail() {
                   : undefined
               }
             />
-            <StatCard
-              label="FMs implicated"
-              value={insights.failures.fmsImplicating.toLocaleString()}
-            />
           </>
         )}
       </div>

apps/web/src/pages/ManufacturerDetail.tsx

@@ -256,9 +256,9 @@ export default function ManufacturerDetail() {
         </div>
       </div>
 
-      <div className="grid gap-4 sm:grid-cols-2 lg:grid-cols-3 xl:grid-cols-6">
+      <div className="grid gap-4 sm:grid-cols-2 lg:grid-cols-3 xl:grid-cols-5">
         {insightsQuery.isPending || !insights ? (
-          Array.from({ length: 6 }).map((_, i) => <Skeleton key={i} className="h-20" />)
+          Array.from({ length: 5 }).map((_, i) => <Skeleton key={i} className="h-20" />)
         ) : (
           <>
             <StatCard label="MPNs" value={insights.totalPartModels.toLocaleString()} />
@@ -286,10 +286,6 @@ export default function ManufacturerDetail() {
                   : undefined
               }
             />
-            <StatCard
-              label="FMs implicated"
-              value={insights.failures.fmsImplicating.toLocaleString()}
-            />
           </>
         )}
       </div>

apps/web/src/pages/PartModelDetail.tsx

@@ -262,9 +262,9 @@ export default function PartModelDetail() {
         </div>
       </div>
 
-      <div className="grid gap-4 sm:grid-cols-2 lg:grid-cols-5">
+      <div className="grid gap-4 sm:grid-cols-2 lg:grid-cols-4">
         {insightsQuery.isPending || !insights ? (
-          Array.from({ length: 5 }).map((_, i) => <Skeleton key={i} className="h-20" />)
+          Array.from({ length: 4 }).map((_, i) => <Skeleton key={i} className="h-20" />)
         ) : (
           <>
             <StatCard label="Units" value={insights.totalParts.toLocaleString()} />
@@ -291,10 +291,6 @@ export default function PartModelDetail() {
                   : undefined
               }
             />
-            <StatCard
-              label="FMs implicated"
-              value={insights.failures.fmsImplicating.toLocaleString()}
-            />
           </>
         )}
       </div>