Polish registration verification email

[computersciencefreshmen]

Summary

• redesign the registration code email with the platform ink-teal, ivory, cinnabar and champagne palette
• add an Outlook-compatible table layout, mobile stacking, plain-text fallback and auto-response suppression headers
• escape dynamic renderer content and reject invalid expiry timestamps
• document the visual direction and release plan

Verification

• pnpm check
• 71 API tests passed
• Playwright visual check at 390px: no horizontal overflow
• generated HTML is 10.9 KiB and contains no remote assets or tracking URLs
• independent read-only review found no blocking or high-risk issues

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Project	Deployment	Actions	Updated (UTC)
international-chinese-platform	Ready	Preview, Comment	Jul 24, 2026 3:30am