Show separate Codex usage pools

app/androidApp/src/main/kotlin/com/example/aiapp/Api.kt

@@ -891,6 +891,10 @@ data class UsageSnapshot(
     val setup: String,
     /** That machine's current label. */
     val setupName: String,
+    /** Provider-specific billing pool, such as Codex's regular or Luna Reserve pool. */
+    val limitId: String?,
+    /** Provider-specific human-facing pool name, when supplied. */
+    val limitName: String?,
     /**
      * What came back: "ok", "notLoggedIn", "unreachable" or "failed".
      *
@@ -912,6 +916,8 @@ fun fetchUsage(settings: ServerSettings): List<UsageSnapshot> =
                 provider = snapshot.getString("provider"),
                 setup = snapshot.optString("setup"),
                 setupName = snapshot.optString("setupName"),
+                limitId = snapshot.optString("limitId").ifEmpty { null },
+                limitName = snapshot.optString("limitName").ifEmpty { null },
                 // Unknown to an older backend, and unknown is not "fine": defaulting to "ok" would
                 // draw an empty card as a healthy one.
                 state = snapshot.optString("state").ifEmpty { "failed" },

app/androidApp/src/main/kotlin/com/example/aiapp/UsageDialog.kt

@@ -108,7 +108,7 @@ private fun UsageBody(state: LoadState<List<UsageSnapshot>>) {
                         // read as a section of their own. Small and quiet, because the numbers
                         // below are what somebody opened this to see.
                         Text(
-                            "${snapshot.setupName.ifEmpty { snapshot.setup }} · ${snapshot.provider}",
+                            usageSectionTitle(snapshot),
                             style = MaterialTheme.typography.bodySmall,
                             color = MaterialTheme.colorScheme.onSurfaceVariant,
                         )
@@ -127,6 +127,20 @@ private fun UsageBody(state: LoadState<List<UsageSnapshot>>) {
     }
 }
 
+private fun usageSectionTitle(snapshot: UsageSnapshot): String {
+    val machine = snapshot.setupName.ifEmpty { snapshot.setup }
+    val provider = snapshot.provider
+    val pool =
+        if (provider == "codex" && snapshot.limitId != "codex") {
+            when (snapshot.limitName) {
+                "gpt-reserve" -> "Luna Reserve"
+                null -> snapshot.limitId
+                else -> snapshot.limitName
+            }
+        } else null
+    return listOfNotNull(machine, provider, pool).joinToString(" · ")
+}
+
 /**
  * Anything other than numbers: why this machine has none.
  *