Add a restock basket and stock count actions

[sridharkalaibala]

Low Stock now collects items in a restock basket instead of opening one purchase for each click. Quantities start at 1, can be edited, and remain available while browsing or refreshing the tab. Finish reviews a direct stock adjustment or transfers one supplier group into a purchase without overwriting an existing purchase draft.

Stock Counts now exposes Start recount, Bulk stock update, Inventory logs, Low stock list and Refresh. Its empty state explains saved worksheets versus completed adjustments. Low Stock has the shared stock tools and refreshes after adjustments.

Validation: browser-tested on the isolated demo: two direct additions (+3/+2), recount restoration, two-item purchase saved with quantities 4/1 and stock unchanged for the order, and basket persistence across reload. API repository suite: 154 passed. Final targeted UI/language suites: 63 passed. Full suite: 4,113 passed, 2 skipped; its one Dutch coverage failure was corrected and the complete affected language suites subsequently passed. Frontend build, packaging, attribution and lint checks passed (existing lint warnings only).

Preview: https://basket-review-test.posnic.com/public/dashboard.html#/lowstockitems

[github-actions]

Merged to develop. Anyone can test this - you do not need write access.

Try it at https://develop.posnic.io, or run it yourself:

git fetch origin develop && git checkout develop
npm install && npm --prefix api install
npm run dev   # then http://localhost:3000

When you have tested it, say what you did and what happened, and set
QA passed or QA failed. If you cannot set labels, just comment -
a maintainer will.

Reporting that something is broken is as useful as fixing it. It is
better found here than by a shopkeeper.