Fix build errors: remove unused STATUS_CLASS, use Link for home nav

https://claude.ai/code/session_01Xmxm2QLgFBgRJyYD6VukR6

apps/webapp/src/app/dashboard/page.tsx

@@ -3,6 +3,7 @@
 import { useEffect, useRef, useState } from 'react';
 import CVTree from '@/components/cv/CVTree';
 import DiffViewer from '@/components/cv/DiffViewer';
+import Link from 'next/link';
 import {
     createBranch, createSubmission, Document, downloadVersionUrl,
     fetchDocuments, publishVersion, uploadDocument, Version,
@@ -218,9 +219,9 @@ export default function Dashboard() {
         <div style={{ display: 'flex', flexDirection: 'column', height: '100vh', overflow: 'hidden', background: 'var(--bg)' }}>
             {/* top bar */}
             <div style={{ display: 'flex', alignItems: 'center', justifyContent: 'space-between', padding: '0 16px', height: 44, borderBottom: '1px solid var(--border)', flexShrink: 0 }}>
-                <a href="/" style={{ fontSize: 13, fontWeight: 600, color: 'var(--text)', textDecoration: 'none' }}>
+                <Link href="/" style={{ fontSize: 13, fontWeight: 600, color: 'var(--text)', textDecoration: 'none' }}>
                     Resume Branches
-                </a>
+                </Link>
                 <button className="btn btn-primary" style={{ padding: '4px 10px', fontSize: 12 }} onClick={() => setModal('upload')}>
                     + Upload CV
                 </button>

apps/webapp/src/components/cv/CVTree.tsx

@@ -15,12 +15,6 @@ function buildTree(versions: Version[]): TreeNode | null {
     return root;
 }
 
-const STATUS_CLASS: Record<string, string> = {
-    draft: 'badge badge-draft', submitted: 'badge badge-submitted',
-    interviewing: 'badge badge-interviewing', offer: 'badge badge-offer',
-    rejected: 'badge badge-rejected', closed: 'badge badge-closed',
-};
-
 function Node({ node, depth, selectedId, onSelect }: {
     node: TreeNode; depth: number; selectedId: string | null; onSelect: (id: string) => void;
 }) {