fix(kiro): Add direct API fetch for enterprise/IdC accounts

Sources/CodexBarCore/Providers/Kiro/KiroAPIFetchStrategy.swift

@@ -0,0 +1,35 @@
+import Foundation
+
+/// Direct API fetch strategy for Kiro usage that bypasses `kiro-cli` and calls
+/// the AWS Q `getUsageLimits` REST endpoint directly.
+///
+/// This fixes enterprise/IdC account usage fetching where `kiro-cli` fails because
+/// it incorrectly passes `profileArn` to the legacy REST API, causing a 400 error.
+/// The Kiro 0.9.2 version of these APIs does NOT accept `profileArn`.
+///
+/// Reference: https://github.com/ZyphrZero/kiro.rs (v0.6.11 fix)
+struct KiroAPIFetchStrategy: ProviderFetchStrategy {
+    let id: String = "kiro.api"
+    let kind: ProviderFetchKind = .apiToken
+
+    private let fetcher: KiroAPIUsageFetcher
+
+    init(fetcher: KiroAPIUsageFetcher = KiroAPIUsageFetcher()) {
+        self.fetcher = fetcher
+    }
+
+    func isAvailable(_ context: ProviderFetchContext) async -> Bool {
+        self.fetcher.hasCredentials(allowSocial: context.sourceMode == .api)
+    }
+
+    func fetch(_ context: ProviderFetchContext) async throws -> ProviderFetchResult {
+        let snapshot = try await self.fetcher.fetchUsage(allowSocial: context.sourceMode == .api)
+        return self.makeResult(
+            usage: snapshot.toUsageSnapshot(),
+            sourceLabel: "api")
+    }
+
+    func shouldFallback(on error: Error, context: ProviderFetchContext) -> Bool {
+        context.sourceMode == .auto
+    }
+}