New

• docs: add feature guide documentation pages with landing page integration #101
• api: add A2A agent-card, agents.json, and expand AI discoverability
• dashboard: add Alpine.js toast notification system with animations
• dashboard: comprehensive UI/UX, accessibility, and security improvements #87
• mcp: add llms.txt to landing page and MCP server for EuroMail API
• sdks: complete TypeScript SDK and create Rust SDK with full API coverage
• api,worker,smtp,common,dashboard: add production readiness infrastructure
• billing: operationalize Stripe integration with webhook idempotency, trial support, and consolidated helpers

Fixed

• ci: add Docker Hub login to avoid pull rate limits
• landing,dashboard: improve anchor navigation, hero clarity, and signup form
• dashboard: add focus indicators, aria-hidden, and autocomplete to templates
• dashboard: exclude whitespace from special characters in password validation
• dashboard: strengthen password policy, brute-force limits, and registration rate limiting
• api,smtp: replace production unwraps with proper error handling #76
• api,tests: resolve 9 failing integration tests across analytics, contact lists, and unsubscribe
• common: suppress clippy too_many_arguments on DB upsert functions
• remove accidentally committed sdks/rust/target and fix gitignore
• tests: add missing AppConfig timeout fields to test initializers