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/src/lib/teamActivity.js

@@ -41,7 +41,7 @@ export function relativeTime(when, now = Date.now()) {
  * Distinct from `teamAdmin.freshnessOf`, which is worded for an operator
  * debugging a sync. A visitor needs one sentence about whether what they are
  * looking at is current, and specifically must never be shown an unconfirmed
- * empty projection as though it were a confirmed empty shard.
+ * empty projection as though it were a confirmed empty one.
  */
 export function freshnessNote(sync = {}, now = Date.now()) {
   // Nothing supplies Teams here, so there is nothing to be stale ABOUT. A
@@ -57,7 +57,7 @@ export function freshnessNote(sync = {}, now = Date.now()) {
  * Group feed items into days, newest first, preserving order within a day (§4.3).
  *
  * Keyed by local calendar date rather than by a UTC slice: "yesterday" is a
- * property of where the reader is sitting, and a shard's evening raid landing at
+ * property of where the reader is sitting, and a game server's evening raid landing at
  * 00:30 UTC belongs on the day the players experienced it.
  */
 export function groupByDay(items = [], locale = undefined) {