New

• blog: add "Send Your First Email in 5 Minutes" getting started tutorial
• blog: add "Why We Chose Rust for Transactional Email" post
• ci: add Python SDK publish workflow with PyPI trusted publisher
• dashboard: add animated SVG icon system for UI state feedback
• dashboard: animated SVG icon system for UI state feedback ([#icons](https://github.com/kalle-works/euromail.dev/issues/icons))
• dashboard: one-click Cloudflare DNS setup via Domain Connect
• dashboard: personalized code examples in onboarding with API key pre-filled
• docs: add sidebar navigation with TOC and sibling page links #321
• domains: configurable sending subdomain for domain reputation isolation
• video: add procedurally generated ambient audio track
• video: add Remotion marketing video project
• video: design polish — iconic SVGs, centered grid, ambient audio ([#polish](https://github.com/kalle-works/euromail.dev/issues/polish))

Fixed

• dashboard: correct loading spinner rotation origin
• dashboard: redesign loading icon from spinner to envelope with pulsing dots
• docs: use consistent X-EuroMail-Api-Key header and update DNS docs
• domain-connect: add txtConflictMatchingMode to DKIM record
• domain-connect: use Prefix txtConflictMatchingMode with v=DKIM1 prefix
• landing: correct Go SDK import path to kalle-works/euromail-go
• landing: hide nginx version from response headers
• landing: update SDK links to standalone repos, add Python SDK
• security: remediate CSO audit findings
• tests: add missing provider_warmup_limits field and suppress clippy type_complexity
• tests: correct remaining CREATED -> ACCEPTED assertion in quota overage test
• tests: correct status codes and suppression reason in integration tests
• worker: seed warmup state for configured sending IPs on startup