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/coding-agent/memory-template.md

@@ -0,0 +1,38 @@
+# Memory Setup - Code
+
+## Initial Setup
+
+Create directory on first use:
+```bash
+mkdir -p ~/code
+touch ~/code/memory.md
+```
+
+## memory.md Template
+
+Copy to `~/code/memory.md`:
+
+```markdown
+# Code Memory
+
+## Preferences
+<!-- User's coding workflow preferences. Format: "preference" -->
+<!-- Examples: always run tests, prefer TypeScript, commit after each feature -->
+
+## Never
+<!-- Things that don't work for this user. Format: "thing to avoid" -->
+<!-- Examples: inline styles, console.log debugging, large PRs -->
+
+## Patterns
+<!-- Approaches that work well. Format: "pattern: context" -->
+<!-- Examples: TDD: for complex logic, screenshots: for UI work -->
+
+---
+Last updated: YYYY-MM-DD
+```
+
+## Notes
+
+- Check `criteria.md` for additional user-specific criteria
+- Use `planning.md` for breaking down complex requests
+- Verify with tests and screenshots per `verification.md`