feat: IMAP mail sync with thread-to-contact matching (PRD §6.1)

Real IMAP connection via imapflow library:
- Connects to IMAP server (IMAPFlow, TLS on port 993)
- Fetches recent messages (configurable limit, default 20)
- Extracts: from, fromEmail, subject, date, snippet (200 chars)
- Thread-to-contact matching (PRD §6.1):
  1. Match sender email against persons table
  2. If no person match, extract domain and match against company.website
  3. Returns matchedCompany + matchedPerson for each email
- Audit-logged (action: crm.mailsync:imap)
- Zod validated (host, port, user, password, folder, limit)
- 502 on IMAP connection failure with detail
- 400 on validation failure

Tested: invalid creds → 502 'IMAP connection failed', missing host → 400

skills/resume-builder/references/keywords/internet.txt

@@ -0,0 +1,45 @@
+产品规划
+产品迭代
+PRD
+需求评审
+用户访谈
+用户画像
+用户增长
+留存
+转化率
+A/B 测试
+漏斗分析
+数据驱动
+跨部门协作
+推动落地
+0-1
+1-N
+商业化
+PMF
+增长黑客
+AARRR
+私域
+GMV
+ROI
+CAC
+LTV
+SOP
+SaaS
+B 端
+C 端
+内容运营
+社群运营
+活动运营
+PMP
+Scrum
+看板
+Sprint
+Jira
+Confluence
+Notion
+飞书
+SQL
+Tableau
+Figma
+Axure
+墨刀