Connect frontend to oRPC server

- Add Vite proxy to forward /api/v1/rpc to API server (port 9861)
- Create oRPC client in src/lib/api/client.ts
- Add @orpc/client and @orpc/contract dependencies
- Add @reviq/api-contract workspace dependency
- Extract DEFAULT_PORT constant to api-server/src/constants.ts
- Change API server default port from 3001 to 9861

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

apps/publisher-dashboard/vite.config.ts

@@ -6,5 +6,11 @@ export default defineConfig({
   plugins: [tailwindcss(), sveltekit()],
   server: {
     port: 6827,
+    proxy: {
+      "/api/v1/rpc": {
+        target: "http://localhost:9861",
+        changeOrigin: true,
+      },
+    },
   },
 });