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>

packages/shared/src/parts.ts

@@ -28,6 +28,7 @@ export function allowedLocationFieldsForState(state: PartState): {
       return { hostId: 'required', binId: 'forbidden', custodianId: 'forbidden' };
     case 'PENDING_DROP_IN_CUSTODY':
     case 'PENDING_DESTRUCTION_IN_CUSTODY':
+    case 'PENDING_REPAIR':
       return { hostId: 'forbidden', binId: 'forbidden', custodianId: 'required' };
     case 'SPARE':
     case 'BROKEN':
@@ -49,7 +50,6 @@ export const CreatePartRequest = z
     hostId: z.string().uuid().optional().nullable(),
     custodianId: z.string().uuid().optional().nullable(),
     notes: z.string().max(4096).optional().nullable(),
-    categoryId: z.string().uuid().optional().nullable(),
     tagIds: z.array(z.string().uuid()).max(32).optional(),
   })
   .superRefine((v, ctx) => {
@@ -115,7 +115,6 @@ export const UpdatePartRequest = z
     hostId: z.string().uuid().nullable().optional(),
     custodianId: z.string().uuid().nullable().optional(),
     notes: z.string().max(4096).nullable().optional(),
-    categoryId: z.string().uuid().nullable().optional(),
     tagIds: z.array(z.string().uuid()).max(32).optional(),
   })
   .refine((v) => Object.keys(v).length > 0, { message: 'At least one field required' })