fix(teams): say "game server", not "shard", on the never-synced Teams panel

Admin → Teams told an operator that an unsynced projection "is not a
confirmed empty shard". Teams is a core primitive and core's word for the
host is the game server; "shard" is Ultima Online's. The detail now reads
"What is shown below does not confirm that the game server has no Teams."

The matching test, and the four comments that said "shard" about the same
state, follow it. Found while making runicgateway.com's core docs
game-neutral (runicgateway.com#34), which had to paraphrase this line
rather than quote it.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01E14m6SuuY6i1vASFeGDBeY

client/test/teamAdmin.test.js

@@ -21,13 +21,13 @@ test('no provider is idle, not a fault', () => {
   assert.match(f.label, /No Team provider/)
 })
 
-test('never synced is reported as never synced, not as an empty shard', () => {
+test('never synced is reported as never synced, not as a game server with no Teams', () => {
   // The failure this prevents: an empty projection core has never confirmed,
   // rendered as though the game genuinely has no Teams.
   const f = freshnessOf({ configured: true, lastSyncAt: null })
   assert.equal(f.tone, TONE.bad)
   assert.equal(f.label, 'Never synced')
-  assert.match(f.detail, /not a confirmed empty shard/)
+  assert.match(f.detail, /does not confirm that the game server has no Teams/)
 })
 
 test('stale says how old it is', () => {