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
2026-10-27 22:50:50 +00:00
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+---
+name: html-ppt-zhangzara-biennale-yellow
+description: Biennale Yellow — 暖羊皮纸上的太阳黄 + 靛蓝衬线 + 阳光晕染渐变。任何应该感觉像艺术双年展海报或美术馆年度方案的 deck：展览 deck / 艺术机构公告 / 设计大会手册 / 策展提案 / 文学出版物 / 工作室回顾。
+visibility: public
+mode: template
+carrier: deck
+scenario: marketing
+pattern_source: pattern.html
+source_priority: skill-first
+triggers:
+  - "做个双年展 deck"
+  - "做个艺术机构方案"
+  - "做个策展提案"
+  - "biennale-yellow"
+  - "zhangzara-biennale-yellow"
+  - "Biennale Yellow"
+  - "editorial"
+  - "atmospheric"
+  - "literary"
+  - "exhibition or biennale"
+  - "html deck"
+  - "html slides"
+  - "zhangzara"
+od:
+  upstream: "https://github.com/zarazhangrui/beautiful-html-templates/tree/main/templates/biennale-yellow"
+  upstream_license: MIT
+  preview:
+    type: html
+    entry: pattern.html
+  design_system:
+    requires: false
+  speaker_notes: false
+  animations: false
+---
+
+# Biennale Yellow
+
+> Solar yellow on warm parchment with deep indigo serif and atmospheric sun-glow gradients.
+
+A single self-contained HTML deck — typography, palette, decorative system,
+and slide vocabulary are all tuned together. Mixing layouts across templates
+breaks the system; stay inside this one.
+
+## At a glance
+
+- **Scheme:** light
+- **Formality:** high
+- **Density:** medium
+- **Slides in demo:** 8
+
+## Best for
+
+Anything that should feel like an art-biennale poster or a museum's annual programme: exhibition decks, arts-institution announcements, design conference brochures, curatorial pitches, literary publications, studio retrospectives. Equally good for any deck wanting Dutch-editorial atmosphere with an unmistakable single-color signature.
+
+## Avoid for
+
+Decks that need visual punch or saturated multi-color energy — the warm-paper canvas and one-yellow palette are intentionally quiet and atmospheric.
+
+## Workflow
+
+1. **Use `pattern.html` only as a secondary pattern reference.** Do not clone it wholesale; extract section rhythm, layout pattern, and interaction behavior, then rebuild for the current brief.
+2. **Replace placeholder content** with the user's real headlines, body copy,
+   numbers, names, dates, and section labels. Match existing dimensions when
+   swapping image placeholders.
+3. **Preserve the design system.** Never substitute fonts, recolor the palette,
+   restructure the layout grid, or strip decorative elements (corner brackets,
+   paper grain, geometric shapes, illustrated SVGs). They are part of the
+   identity.
+4. **Adjust deck length by duplicating layouts.** If the user has more content
+   than the demo holds, duplicate an existing slide of the most appropriate
+   layout. If less, drop slides from the bottom. Update page-number labels.
+5. **Designing missing layouts:** if a slide needs a layout the template
+   doesn't have, design it from scratch using the same fonts, palette,
+   decorative vocabulary, spacing rhythm, and component grammar — never bail
+   to a different template.
+6. **Keep the navigation runtime as shipped.** If the deck ships an
+   `assets/deck-stage.js` or inline keyboard handler, leave it intact.
+
+## Output contract
+
+Emit between `<artifact>` tags:
+
+```
+<artifact identifier="zhangzara-biennale-yellow" type="text/html" title="Deck Title">
+<!doctype html>
+<html>...</html>
+</artifact>
+```
+
+## Source & license
+
+Vendored from upstream MIT-licensed
+[`zarazhangrui/beautiful-html-templates`](https://github.com/zarazhangrui/beautiful-html-templates/tree/main/templates/biennale-yellow).
+
+The full upstream MIT license text — including the original copyright notice — ships in this skill at
+[`LICENSE`](./LICENSE) and must be redistributed alongside any copy of `pattern.html`,
+`template.json`, or any vendored `assets/` runtime. See `template.json` for the upstream metadata snapshot.