fix: merge PR #562 — MCP session management, Claude passthrough, OAuth modal, detectFormat fixes

Cherry-pick from codex/omniroute-fixes-20260324:
- Replace MCP singleton transport with per-session architecture for Streamable HTTP
- Fix Claude passthrough via OpenAI round-trip normalization
- Add detectFormatFromEndpoint() for endpoint-aware format detection
- Support raw code#state in OAuth modal for Claude Code remote auth
- Expose cloudConfigured/cloudUrl/machineId in settings API
- Switch docker-compose.prod.yml target to runner-cli
- Add 3 new tests for round-trip and detectFormat

PR: #562

src/app/api/providers/[id]/models/route.ts

@@ -55,6 +55,21 @@ const STATIC_MODEL_PROVIDERS: Record<string, () => Array<{ id: string; name: str
     { id: "nanobanana-flash", name: "NanoBanana Flash (Gemini 2.5 Flash)" },
     { id: "nanobanana-pro", name: "NanoBanana Pro (Gemini 3 Pro)" },
   ],
+  antigravity: () => [
+    { id: "claude-opus-4-6-thinking", name: "Claude Opus 4.6 Thinking" },
+    { id: "claude-sonnet-4-6", name: "Claude Sonnet 4.6" },
+    { id: "gemini-2.5-pro", name: "Gemini 2.5 Pro" },
+    { id: "gemini-2.5-flash", name: "Gemini 2.5 Flash" },
+    { id: "gemini-2.0-flash", name: "Gemini 2.0 Flash" },
+    { id: "gpt-oss-120b-medium", name: "GPT OSS 120B Medium" },
+  ],
+  claude: () => [
+    { id: "claude-opus-4-6", name: "Claude Opus 4.6" },
+    { id: "claude-sonnet-4-6", name: "Claude Sonnet 4.6" },
+    { id: "claude-opus-4-5-20251101", name: "Claude Opus 4.5 (2025-11-01)" },
+    { id: "claude-sonnet-4-5-20250929", name: "Claude Sonnet 4.5 (2025-09-29)" },
+    { id: "claude-haiku-4-5-20251001", name: "Claude Haiku 4.5 (2025-10-01)" },
+  ],
   perplexity: () => [
     { id: "sonar", name: "Sonar (Fast Search)" },
     { id: "sonar-pro", name: "Sonar Pro (Advanced Search)" },
@@ -419,6 +434,14 @@ export async function GET(request, { params }) {
       });
     }
 
+    if (provider === "claude") {
+      return NextResponse.json({
+        provider,
+        connectionId,
+        models: STATIC_MODEL_PROVIDERS.claude(),
+      });
+    }
+
     if (isAnthropicCompatibleProvider(provider)) {
       let baseUrl = getProviderBaseUrl(connection.providerSpecificData);
       if (!baseUrl) {
@@ -434,13 +457,14 @@ export async function GET(request, { params }) {
       }
 
       const url = `${baseUrl}/models`;
+      const token = accessToken || apiKey;
       const response = await fetch(url, {
         method: "GET",
         headers: {
           "Content-Type": "application/json",
-          "x-api-key": apiKey,
+          ...(apiKey ? { "x-api-key": apiKey } : {}),
           "anthropic-version": "2023-06-01",
-          Authorization: `Bearer ${apiKey}`,
+          ...(token ? { Authorization: `Bearer ${token}` } : {}),
         },
       });
 

src/app/api/settings/route.ts

@@ -7,6 +7,7 @@ import { getRuntimePorts } from "@/lib/runtime/ports";
 import { updateSettingsSchema } from "@/shared/validation/settingsSchemas";
 import { isValidationFailure, validateBody } from "@/shared/validation/helpers";
 import { setCliCompatProviders } from "../../../../open-sse/config/cliFingerprints";
+import { getConsistentMachineId } from "@/shared/utils/machineId";
 
 export async function GET() {
   try {
@@ -20,6 +21,8 @@ export async function GET() {
 
     const enableRequestLogs = process.env.ENABLE_REQUEST_LOGS === "true";
     const runtimePorts = getRuntimePorts();
+    const cloudUrl = process.env.CLOUD_URL || process.env.NEXT_PUBLIC_CLOUD_URL || null;
+    const machineId = await getConsistentMachineId();
 
     return NextResponse.json({
       ...safeSettings,
@@ -28,6 +31,9 @@ export async function GET() {
       runtimePorts,
       apiPort: runtimePorts.apiPort,
       dashboardPort: runtimePorts.dashboardPort,
+      cloudConfigured: Boolean(cloudUrl),
+      cloudUrl,
+      machineId,
     });
   } catch (error) {
     console.log("Error getting settings:", error);