fix: version guard uses static file, members table shows project name with round badge

Version guard:
- Replace API route with prebuild-generated public/build-id.json
- Captures build ID on first load, only notifies on mismatch
- Fixes false positive refresh prompts from env mismatch

Members table (applicants):
- Show project name + round badge instead of round name + state
- Red badge for rejected, gray for withdrawn, green for passed,
  outline for active rounds
- Include projectName in applicantRoundInfo from backend

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

next.config.ts

@@ -2,9 +2,6 @@ import type { NextConfig } from 'next'
 
 const nextConfig: NextConfig = {
   output: 'standalone',
-  env: {
-    NEXT_PUBLIC_BUILD_ID: Date.now().toString(),
-  },
   serverExternalPackages: ['@prisma/client', 'minio'],
   typescript: {
     // We run tsc --noEmit separately before each push