fix(api): correct online count in /v1/me/workspace

count distinct members with disconnectedAt is null instead of
all presence rows — a member can have many sessions, plus stale
rows from prior runs.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

packages/api/src/modules/mesh/v1-router.ts

@@ -435,12 +435,16 @@ export const v1Router = new Hono<Env>()
     const onlineCounts = await db
       .select({
         meshId: meshMember.meshId,
-        online: count(presence.memberId),
+        online: sql<number>`count(distinct ${presence.memberId})`,
       })
       .from(presence)
       .innerJoin(meshMember, eq(presence.memberId, meshMember.id))
       .where(
-        and(inArray(meshMember.meshId, meshIds), isNull(meshMember.revokedAt)),
+        and(
+          inArray(meshMember.meshId, meshIds),
+          isNull(meshMember.revokedAt),
+          isNull(presence.disconnectedAt),
+        ),
       )
       .groupBy(meshMember.meshId);