feat: laundry-list polish pass

Seven bundled improvements:
- PartModel combobox on Add Part + Log Repair (known MPN auto-fills;
  unknown reveals manufacturer picker for catalog upsert).
- Host lifecycle: state (DEPLOYED/DEGRADED/TESTING) and stack
  (PRODUCTION/VETTING) fields, driven by external clients via the API.
- Locations page redesigned as a 2-pane tree + bin grid with breadcrumb.
- PENDING_REPAIR custody state: tech takes a SPARE into custody for a
  future swap; resolves to DEPLOYED via Repair or back to SPARE via a
  bin-required drop-off.
- Move Category from Part to PartModel; seed common categories
  (GPU/RAM/SSD/HDD/NIC/CPU/PSU/MOBO). Parts table gets a Category
  column and filter sourced from the model.
- Fix Deployed Value 100x bug on the Dashboard (price is stored as
  dollars, not cents).
- PartModels table shows "No" instead of "--" when destroyOnFail=false.

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

apps/api/src/services/repairs.ts

@@ -78,7 +78,7 @@ export async function log(
 ): Promise<RepairWithRelations> {
   const host = await resolveHost(tx, input);
 
-  // 1. Resolve replacement — must exist, must be SPARE.
+  // 1. Resolve replacement — must exist; must be SPARE, or a PENDING_REPAIR held by the actor.
   const replacement = await tx.part.findUnique({
     where: { serialNumber: input.replacementSerial },
     include: { partModel: true },
@@ -86,9 +86,11 @@ export async function log(
   if (!replacement) {
     throw errors.badRequest(`Replacement part ${input.replacementSerial} not found`);
   }
-  if (replacement.state !== 'SPARE') {
+  const heldForRepairByActor =
+    replacement.state === 'PENDING_REPAIR' && replacement.custodianId === actor.id;
+  if (replacement.state !== 'SPARE' && !heldForRepairByActor) {
     throw errors.badRequest(
-      `Replacement part ${input.replacementSerial} is ${replacement.state}, must be SPARE`,
+      `Replacement part ${input.replacementSerial} is ${replacement.state}, must be SPARE or PENDING_REPAIR held by you`,
     );
   }
 
@@ -104,10 +106,22 @@ export async function log(
       );
     }
   } else {
-    const pm = await partModelsSvc.upsertByMpn(tx, {
-      manufacturerId: input.brokenManufacturerId,
-      mpn: input.brokenMpn,
-    });
+    let pm: { id: string; manufacturerId: string };
+    if (input.brokenPartModelId) {
+      const existing = await tx.partModel.findUnique({ where: { id: input.brokenPartModelId } });
+      if (!existing) throw errors.badRequest('Broken part model does not exist');
+      pm = { id: existing.id, manufacturerId: existing.manufacturerId };
+    } else {
+      if (!input.brokenMpn || !input.brokenManufacturerId) {
+        throw errors.badRequest(
+          'Provide brokenPartModelId or both brokenMpn and brokenManufacturerId',
+        );
+      }
+      pm = await partModelsSvc.upsertByMpn(tx, {
+        manufacturerId: input.brokenManufacturerId,
+        mpn: input.brokenMpn,
+      });
+    }
     const created = await tx.part.create({
       data: {
         serialNumber: input.brokenSerial,