v0.15.0 — Inventory depth (HomeBox parity) + Locations page

Rounds out Inventory toward HomeBox, and gives Locations a real home.

Inventory:
- Attach manuals, receipts, and warranty docs (any file), not just photos —
  attachment uploader now has a kind picker; WARRANTY kind added
- Richer purchase/warranty: purchasedFrom, warrantyDetails, lifetimeWarranty,
  insured (item dialog + detail facts + header badge)
- Schedule recurring maintenance from an item (creates a Task linked via
  itemId); item detail shows its maintenance with overdue flagged. Task create
  now accepts itemId/animalId

Locations:
- New Locations page + nav: browse/add/rename/move/delete the whole place tree
  (LocationManager over the existing /api/locations routes); shows plant/item
  counts per place. The spot to merge near-dupes before dropping legacy zone

Verified end-to-end against a running server (new fields round-trip, maintenance
task links to item, MANUAL attachment stored). tsc + 33 tests + build green.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

prisma/schema.prisma

@@ -314,12 +314,16 @@ model Item {
   containedItems Item[]     @relation("ItemNesting")
 
   // Durable attributes
-  value          Decimal?   @db.Decimal(10, 2)
-  purchaseDate   DateTime?
-  warrantyExpiry DateTime?
-  serial         String?
-  modelNumber    String?
-  brand          String?
+  value            Decimal?  @db.Decimal(10, 2) // purchase price
+  purchaseDate     DateTime?
+  purchaseFrom     String?   // where it was bought
+  warrantyExpiry   DateTime?
+  warrantyDetails  String?   // freeform warranty terms
+  lifetimeWarranty Boolean   @default(false)
+  insured          Boolean   @default(false)
+  serial           String?
+  modelNumber      String?
+  brand            String?   // brand / manufacturer
 
   // Consumable attributes (Pantry phase)
   barcode        String?