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>

bun.lock

@@ -50,6 +50,9 @@
       "name": "@apps/publisher-dashboard",
       "version": "0.0.1",
       "dependencies": {
+        "@orpc/client": "^1.13.2",
+        "@orpc/contract": "^1.13.2",
+        "@reviq/api-contract": "workspace:*",
         "@tanstack/svelte-query": "^6.0.14",
         "@tanstack/svelte-query-devtools": "^6.0.3",
         "bits-ui": "^2.15.4",