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/design/design-templates/blog-post/SKILL.md

@@ -0,0 +1,89 @@
+---
+name: blog-post
+description: Long-form Chinese article / blog-post template — two voices: a wildstay-style lifestyle launch piece with editorial grid + oversized display type, and a WeChat-公众号-style serif beauty/longform with measured prose and quiet hairlines.
+visibility: public
+mode: template
+carrier: long-form-article
+scenario: editorial-content
+pattern_source: qiye-wildstay.html, 肌肤专题｜关于屏障的一次重读.html
+source_priority: skill-first
+triggers:
+  - "做个长文页"
+  - "公众号长文"
+  - "野宿 lifestyle 大标题页"
+  - "美妆专题长文"
+  - "中文博客文"
+  - "editorial 长文"
+---
+
+# Blog Post Template
+
+Use this template for **single-page long-form Chinese articles** — brand stories, lifestyle features, beauty / wellness deep-reads, cultural essays, 公众号-style long posts rendered as standalone web pages.
+
+This template ships two variants. Pick before building.
+
+## Variants
+
+### `qiye-wildstay.html` — Lifestyle / brand-launch editorial
+
+- Voice: aspirational, energetic, image-led, asymmetric.
+- Use for: 户外 / 旅行 / 营地 / 生活方式新品发布, brand-launch features, 品牌故事 with strong photography.
+- Distinctive moves: oversized display numerals (date as poster), Helvetica + PingFang stack, grid-scattered title characters, rotated accent bars, pill CTAs.
+
+### `肌肤专题｜关于屏障的一次重读.html` — Serif long-read
+
+- Voice: introspective, scholarly, text-first.
+- Use for: 美妆 / 护肤 / 健康 / 科普 / 文化深度文章, 公众号-style serialized columns.
+- Distinctive moves: Songti SC display title + Cormorant Garamond italic English subtitle, blue-grey accent rules, justified body, restrained metadata header.
+
+## Use When
+
+- The artifact is a **scrolling web article**, not a fixed-image card.
+- Content is paragraph-led with images, pull-quotes, possibly a few module breaks.
+- The user wants 公众号 / 杂志专题 / 品牌长读 feel — not a SaaS landing, not a social card.
+
+## Avoid When
+
+- The piece is < 200 words — use a social card instead.
+- The content is operational (KPIs, dashboards, schedules, OKRs).
+- The output is meant to be exported as one image (use social-card-editorial).
+- The user wants a deck (use a `ppt/` template).
+
+## Required Reading
+
+Read this `SKILL.md` first. Then read **only the chosen variant** in full to lift typographic rhythm and section transitions.
+
+Do not mix the two voices in one piece. They embody different reading contracts.
+
+## Design Strategy
+
+Pick the variant from voice, not topic:
+
+- Energy + photography forward → **wildstay**
+- Quiet + reasoned + paragraphs → **肌肤专题**
+
+Then decide the spine:
+
+- masthead / metadata strip (issue, date, author, kicker)
+- title block (display + sub + dek)
+- hero image or hero quote (not both)
+- 3–6 body sections with clear hierarchy
+- inline images with captions (numbered if many)
+- closing / colophon
+
+## Layout Bias
+
+Prefer:
+
+- generous line-height for CJK body (≥ 1.75)
+- one display font + one body font, not three
+- hairline rules over decorative dividers
+- justified or natural ragged-right body — never centered
+- captions and metadata in small caps / mono / Latin to break the Chinese rhythm
+
+Avoid:
+
+- emoji decorations inside body copy
+- generic blog-card grids ("related posts" tiles)
+- background gradients behind body copy
+- multi-column body on desktop unless variant explicitly supports it