Group F - Fix spending per tenant

src/components/dashboard/usage-display.tsx

@@ -94,17 +94,27 @@ function UsageChart({ data }: { data: DailyUsage[] }) {
 /**
  * Usage display widget.
  *
- * - Customers: don't pass teamId or keyAlias — the backend resolves both
- *   from the session-bound tenant.
- * - Admins inspecting a specific tenant: pass `teamId` (the org-level
- *   LiteLLM team id) AND `keyAlias` (the tenant's virtual-key alias).
- *   Without `keyAlias`, the response includes spend from sibling tenants
- *   in the same org, since teams are shared since Slice 2.
+ * Pass `tenant=<name>` for the canonical path — works for both
+ * customers and admins, the API resolves team+alias from the tenant
+ * CR's status. The visibility check on the API ensures users can't
+ * query tenants they shouldn't see.
+ *
+ * `teamId`/`keyAlias` remain available as a platform-admin escape
+ * hatch for cross-org debugging, but the tenant-detail and dashboard
+ * paths should always use `tenant`.
+ *
+ * Bug 19 fix: previous version omitted both props for customer
+ * sessions, expecting the API to "figure it out". The API's fallback
+ * was "first visible tenant", which meant siblings in the same org
+ * showed identical numbers regardless of which detail page was open.
+ * Now the page passes the tenant name explicitly; no fallback exists.
  */
 export function UsageDisplay({
+  tenant,
   teamId,
   keyAlias,
 }: {
+  tenant?: string | null;
   teamId?: string | null;
   keyAlias?: string | null;
 }) {
@@ -121,11 +131,13 @@ export function UsageDisplay({
     setError(null);
 
     const params = new URLSearchParams({ month });
-    if (teamId) {
+    if (tenant) {
+      params.set("tenant", tenant);
+    } else if (teamId) {
+      // Admin escape hatch — only honoured by the API when the
+      // viewer is platform-role.
       params.set("teamId", teamId);
-    }
-    if (keyAlias) {
-      params.set("keyAlias", keyAlias);
+      if (keyAlias) params.set("keyAlias", keyAlias);
     }
 
     fetch(`/api/usage?${params}`)
@@ -133,7 +145,7 @@ export function UsageDisplay({
       .then(setData)
       .catch((e) => setError(e.message))
       .finally(() => setLoading(false));
-  }, [teamId, keyAlias, month]);
+  }, [tenant, teamId, keyAlias, month]);
 
   useEffect(() => { fetchUsage(); }, [fetchUsage]);