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/video-understand/scripts/video-understand.ts

@@ -0,0 +1,41 @@
+import ZAI, { VisionMessage } from 'z-ai-web-dev-sdk';
+
+async function main(videoUrl: string, prompt: string) {
+	try {
+		const zai = await ZAI.create();
+
+		const messages: VisionMessage[] = [
+			{
+				role: 'assistant',
+				content: [
+					{ type: 'text', text: 'Output only text, no markdown.' }
+				]
+			},
+			{
+				role: 'user',
+				content: [
+					{ type: 'text', text: prompt },
+					{ type: 'video_url', video_url: { url: videoUrl } }
+				]
+			}
+		];
+
+		const response = await zai.chat.completions.createVision({
+			model: 'glm-4.6v',
+			messages,
+			thinking: { type: 'disabled' }
+		});
+
+		const reply = response.choices?.[0]?.message?.content;
+		console.log('Video Understanding Result:');
+		console.log(reply ?? JSON.stringify(response, null, 2));
+	} catch (err: any) {
+		console.error('Video understanding failed:', err?.message || err);
+	}
+}
+
+// Example usage - analyze a video
+main(
+	"https://example.com/sample-video.mp4",
+	"Please analyze this video and describe the main events, actions, and key moments in chronological order."
+);