fix(sdk): point exports to source and remove .js import suffixes

- Change package exports from dist/ to src/ (consistent with @multica/store and @multica/ui)
- Add private: true since SDK is an internal monorepo package
- Switch tsconfig from NodeNext to bundler moduleResolution
- Remove .js suffixes from all internal imports for Turbopack compatibility

Eliminates the need to build SDK before running dev server or Next.js build.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

packages/sdk/package.json

@@ -2,14 +2,9 @@
   "name": "@multica/sdk",
   "version": "0.1.0",
   "type": "module",
-  "main": "dist/index.js",
-  "types": "dist/index.d.ts",
+  "private": true,
   "exports": {
-    ".": {
-      "types": "./dist/index.d.ts",
-      "import": "./dist/index.js",
-      "default": "./dist/index.js"
-    },
+    ".": "./src/index.ts",
     "./*": "./src/*.ts"
   },
   "scripts": {

packages/sdk/src/actions/index.ts

@@ -3,7 +3,7 @@ export {
   HelloResponseAction,
   type HelloPayload,
   type HelloResponsePayload,
-} from "./hello.js";
+} from "./hello";
 
 export {
   RequestAction,
@@ -25,6 +25,6 @@ export {
   type DeleteAgentResult,
   type UpdateGatewayParams,
   type UpdateGatewayResult,
-} from "./rpc.js";
+} from "./rpc";
 
-export { StreamAction, type StreamPayload } from "./stream.js";
+export { StreamAction, type StreamPayload } from "./stream";

packages/sdk/src/client.ts

@@ -11,15 +11,15 @@ import type {
   DeviceType,
   DeviceInfo,
   ListDevicesResponse,
-} from "./types.js";
-import { GatewayEvents } from "./types.js";
+} from "./types";
+import { GatewayEvents } from "./types";
 import {
   RequestAction,
   ResponseAction,
   type RequestPayload,
   type ResponsePayload,
   isResponseSuccess,
-} from "./actions/rpc.js";
+} from "./actions/rpc";
 
 interface PendingRequest<T = unknown> {
   resolve: (value: T) => void;

packages/sdk/src/index.ts

@@ -1,4 +1,4 @@
-export { GatewayClient } from "./client.js";
+export { GatewayClient } from "./client";
 export {
   GatewayEvents,
   type DeviceType,
@@ -12,7 +12,7 @@ export {
   type PingPayload,
   type PongResponse,
   type ListDevicesResponse,
-} from "./types.js";
+} from "./types";
 
 // Actions
-export * from "./actions/index.js";
+export * from "./actions/index";

packages/sdk/tsconfig.json

@@ -1,8 +1,8 @@
 {
   "compilerOptions": {
     "target": "ESNext",
-    "module": "NodeNext",
-    "moduleResolution": "NodeNext",
+    "module": "ESNext",
+    "moduleResolution": "bundler",
     "declaration": true,
     "declarationMap": true,
     "sourceMap": true,