feat(control-panel): add oidc account switching

packages/casan-control-panel/backend/src/app.module.ts

@@ -8,9 +8,10 @@ import { ChatModule } from './chat/chat.module.js';
 import { ProviderAuthModule } from './provider-auth/provider-auth.module.js';
 import { GoalsModule } from './goals/goals.module.js';
 import { EvidenceModule } from './evidence/evidence.module.js';
+import { SessionController } from './session/session.controller.js';
 
 @Module({
   imports: [TelemetryModule, SettingsModule, KillSwitchModule, ApprovalsModule, ChatModule, ProviderAuthModule, GoalsModule, EvidenceModule],
-  controllers: [HealthController],
+  controllers: [HealthController, SessionController],
 })
 export class AppModule {}

packages/casan-control-panel/backend/src/session/session.controller.ts

@@ -0,0 +1,11 @@
+import { Controller, Get, Headers } from '@nestjs/common';
+import { ok } from '../common/api-response.js';
+import { actorFromHeaders } from '../common/auth-context.js';
+
+@Controller('api/v1/session')
+export class SessionController {
+  @Get()
+  current(@Headers() headers: Record<string, string | string[] | undefined>) {
+    return ok(actorFromHeaders(headers));
+  }
+}