fix(rust): answer refusals in the field core reads, and show the name the game last saw

The two defects the phase 6 browser walk found and #6 described but did not
carry. They were written, walked and left uncommitted; `edge` still has the
shapes the walk condemned.

**Every refusal sentence was invisible.** Core's request primitive reads one
field — `(data && data.message) || res.statusText` — and this module has
answered `{ error: … }` since phase 1. It got away with it because every
failure until phase 6 landed in `ErrorState` on a page whose whole content was
missing, where a generic sentence is honest. A form is different: the sentence
IS the outcome, and the link page showed *Service Unavailable* for all four of
the refusals phase 6 exists to write. All 23 bodies now answer in `message` —
core's `Error` schema, which these routes' own `#swagger.responses` already
referenced, so the annotations stop being a claim the handlers contradict.

`test/errorShape.test.js` drives each outcome rather than grepping for the
field, and asserts the half that is easy to leave behind: a body carrying BOTH
fields renders correctly in a browser and keeps the wrong shape alive for the
next route that copies it.

**The player saw a stale name.** `/player/rust` showed the name recorded at
link time while the admin panel showed the one the game last saw — the same
person labelled two ways on one site, because a Rust name changes on a whim and
only the admin read joined `rust_players`. A LEFT JOIN, because an account can
be linked and never played on.

123 server tests, 39 client tests, `check:imports`, `check:bundle`,
`check:swagger`, `check:externals` — all green.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01PMH6bw1jXMgbyF3ZWGEzSM

server/router/public/rust.controller.js

@@ -21,7 +21,7 @@ async function listServers(req, res) {
     res.json({ servers: await servers.listPublic() })
   } catch (err) {
     log.error('failed to read the server list', { error: err.message })
-    res.status(500).json({ error: 'Failed to read the server list' })
+    res.status(500).json({ message: 'Failed to read the server list' })
   }
 }
 
@@ -39,13 +39,13 @@ async function getServer(req, res) {
   try {
     const server = await servers.getPublic(req.params.id)
     if (!server) {
-      res.status(404).json({ error: 'No such server' })
+      res.status(404).json({ message: 'No such server' })
       return
     }
     res.json({ server })
   } catch (err) {
     log.error('failed to read a server', { server: req.params.id, error: err.message })
-    res.status(500).json({ error: 'Failed to read the server' })
+    res.status(500).json({ message: 'Failed to read the server' })
   }
 }
 
@@ -69,7 +69,7 @@ async function listEvents(req, res) {
     })
   } catch (err) {
     log.error('failed to read events', { server: req.params.id, error: err.message })
-    res.status(500).json({ error: 'Failed to read events' })
+    res.status(500).json({ message: 'Failed to read events' })
   }
 }
 
@@ -85,7 +85,7 @@ async function listLeaderboard(req, res) {
     })
   } catch (err) {
     log.error('failed to read the leaderboard', { server: req.params.id, error: err.message })
-    res.status(500).json({ error: 'Failed to read the leaderboard' })
+    res.status(500).json({ message: 'Failed to read the leaderboard' })
   }
 }
 
@@ -94,7 +94,7 @@ async function listWipes(req, res) {
     res.json({ wipes: await events.wipes(req.params.id) })
   } catch (err) {
     log.error('failed to read wipes', { server: req.params.id, error: err.message })
-    res.status(500).json({ error: 'Failed to read wipes' })
+    res.status(500).json({ message: 'Failed to read wipes' })
   }
 }
 
@@ -103,7 +103,7 @@ async function listOnline(req, res) {
     res.json({ players: await events.online(req.params.id) })
   } catch (err) {
     log.error('failed to read presence', { server: req.params.id, error: err.message })
-    res.status(500).json({ error: 'Failed to read who is online' })
+    res.status(500).json({ message: 'Failed to read who is online' })
   }
 }