Two things I got wrong when I opened up direct asset registration.

**There was nowhere to type what the asset IS.** The register carried a tag, a
category and a serial — the name was borrowed from `inventory_items.name_ar`,
which works only while every asset comes from stock. A building, a court or a
transformer has no stock row, so the detail screen showed an empty cell and the
form never asked. The register is meant to be read by someone doing a physical
count: "أثاث ومعدات" tells them nothing, "مكيف سبليت ٣ حصان — قاعة الاجتماعات"
tells them exactly what to look for. `asset_name` is now a required field,
backfilled from the linked item where there is one and from the category
otherwise, so no existing row loses the name it was already showing. It is also
searchable.

**The edit route had no button.** `/inventory/assets/{id}/edit` existed and
worked; nothing linked to it, so once an asset was saved there was no way back
in from the UI. Buttons on both the detail page and the register rows, hidden
for disposed assets since those are history.

Also corrected the labels that direct registration made wrong: the column header
and search hint still said "الصنف", and the empty state still claimed assets are
only created automatically when stock of type "أصل" is received.

Verified on a production clone: name saves, displays on both screens, is
findable by search, both edit buttons render, 1503 routes resolve.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>