v0.16.0 — HomeBox CSV import + sold lifecycle + custom fields

Bring an existing HomeBox inventory straight in, and capture the fields HomeBox
has that we were missing (skipping asset IDs per Tony).

- Item: soldTo/soldPrice/soldDate/soldNotes + flexible customFields (JSON, e.g.
  VIN / oil weight for vehicles); both editable in the item dialog and shown on
  the detail page
- Pure HomeBox CSV parser (src/lib/inventory/homebox-import.ts, +5 tests) —
  RFC4180 quoting (commas/newlines/escaped quotes in fields), HomeBox's 0001-*
  null dates and 0 = empty price, semicolon labels, HB.field.* custom columns,
  nested 'A / B' location paths
- Import service + /api/v1/items/import: find-or-creates the nested locations
  and labels, creates items, recomputes location paths, returns a summary
- Inventory 'Import' button: paste/upload CSV, review every row with checkboxes
  (uncheck to skip), then import. Preview parses client-side (parser is pure)
- Verified end-to-end: nested locations, split labels, sold + custom fields,
  skip, quoted names, null-date handling. tsc + 38 tests + build green

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

src/lib/changelog.ts

@@ -8,6 +8,14 @@ export type ChangelogEntry = {
 };
 
 export const CHANGELOG: ChangelogEntry[] = [
+  {
+    version: "0.16.0",
+    date: "2026-06-16",
+    changes: [
+      "Import your inventory from HomeBox — on the Inventory page, click Import, paste or upload your HomeBox CSV, review every item (uncheck any you don't want), and it brings them in, creating the locations and labels for you.",
+      "Items can now record custom fields (like VIN or oil weight for vehicles) and a 'sold' record (who to, price, when) — and you can edit both on any item.",
+    ],
+  },
   {
     version: "0.15.0",
     date: "2026-06-16",