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/enums.ts

@@ -7,9 +7,16 @@ export const PartState = z.enum([
   'PENDING_DESTRUCTION',
   'PENDING_DROP_IN_CUSTODY',
   'PENDING_DESTRUCTION_IN_CUSTODY',
+  'PENDING_REPAIR',
 ]);
 export type PartState = z.infer<typeof PartState>;
 
+export const HostState = z.enum(['DEPLOYED', 'DEGRADED', 'TESTING']);
+export type HostState = z.infer<typeof HostState>;
+
+export const HostStack = z.enum(['PRODUCTION', 'VETTING']);
+export type HostStack = z.infer<typeof HostStack>;
+
 export const Role = z.enum(['ADMIN', 'TECHNICIAN']);
 export type Role = z.infer<typeof Role>;