docs(site): the Asset Bridge — protocol 8, a screen for client files, and pictures in the screenshots (Phase 9c)

The last leg of the Asset Bridge (docs/link/v8.md §16, phase 9c). The cutover put
protocol 8 on `main` in every declaration site, which turned this repo red by
construction: `checkFacts.mjs` reads the protocol from `link`'s `main`.

Two checks were failing, and only one of them was expected.

**checkFacts (10)** — protocol 7 → 8 in all three reads (sidecar, overlay, bundle),
the bundle triple to 2026.09.15 / sidecar v2.3.0 / overlay v1.3.0, and the releases
to link v2.3.0, installer v0.2.0, Module-uo v1.3.0. `moduleApi` and the capability
list did not move: core's whole share of eight phases was a deletion.

**checkReference (9)** — nobody had planned for this one. `Bridge.cfg` grew nine keys
across phases 5, 6 and 7 and the reference page had gone on not mentioning them,
which is the failure mode that check exists for. They are listed as two new groups,
`Client assets` and `Spawn files`, because they are two separate consents.

## The prose the bridge changed

- **New page, Administration → Client files.** `Admin → Client files` is a screen an
  operator has to press a button on and the site had no page for it. It carries the
  rule nothing else states: **nothing here happens on a restart**, so a patched client
  keeps serving the old artwork until somebody says so.
- **Protocol versions** said the most recent bump touched five repositories and named
  `website`. Protocol 8 touched four and did not reach core — its absence is the
  interesting half, and the page now says why. The store-migration paragraph gains 8,
  which changed no line of the sidecar's store despite moving megabytes.
- **The bridge** said "two ways in". There are three: bulk reads go over the
  request/reply path in pages, one in flight at a time, and the reason they must not
  ride the event stream is structural rather than about speed.
- **Requirements** gains `libgdiplus` for Linux shard hosts, and the note that no game
  client has to be installed for any of this — a ServUO shard cannot boot without one.
- **Troubleshooting** gains the failure mode that did not exist before: a bestiary with
  no pictures, or items reading as numbers.
- **Maintenance** gains the button to press after patching a client, and **Verify the
  whole stack** the `doctor` check that landed with it.
- The spawn atlas and the marketplace both carry artwork now, so both capability
  descriptions say so, and `canonicalDocs` points at `link/v8.md`.

## Screenshots, retaken against the real thing

The atlas and marketplace shots predate the asset plane, so both were retaken on the
demo deployment against a real shard and a real sidecar, plus the new admin screen:
1,095 portraits imported in 2.1 s, 67,496 names in 1.4 s, 313 item pictures in 0.8 s.
Nothing here is a mock-up. The atlas shot moved 36px down its page because portraits
made the rows taller.

## One defect found on the way

`seedDemo.mjs` pinned the demo deployment at **protocol 4** with a comment explaining
a `module-uo` debt that has since been paid. Its default now comes from
`platform.json`, so the rig cannot drift two protocols behind the platform again.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_016wDDVXWMDz82WqE1i969r4

src/data/capabilities.mjs

@@ -232,7 +232,8 @@ const gameIntelligence = {
       detail:
         'Every player vendor on the server and what is on it, searchable without logging ' +
         'in to the game. Item names arrive from the world as numeric ids and are resolved ' +
-        "against the game's own string table, so they read as names rather than numbers.",
+        "against the game's own string table, so they read as names rather than numbers — " +
+        "beside the item's own picture, in the colour it was dyed.",
     },
     {
       label: 'Houses and IDOC decay',
@@ -249,7 +250,8 @@ const gameIntelligence = {
       detail:
         "A bestiary and spawn map built by reading your shard's own spawn tables, so it " +
         "describes your server rather than someone else's idea of the game. Regions, " +
-        'landmarks and champion altars come with it.',
+        'landmarks and champion altars come with it, and each creature is shown as the ' +
+        'artwork your own client draws it with.',
     },
     {
       label: 'Champion boards',