feat: SEO audit export, default Vibe Architect, /vibe route (v2.0.0)

CHANGELOG.md

@@ -3,7 +3,24 @@
 All notable changes to this project will be documented in this file.
 
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
-and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+and this project adheres to [Semantic Versioning]
+## [2.0.0] - 2026-03-18 21:33 UTC
+
+### Added
+- **SEO Audit Export** — Export SEO/GEO audit reports as HTML or PDF with comprehensive fix instructions
+- **SEO Report Generator** — Standalone `lib/seo-report.ts` utility with color-coded scores, issue tables with fix instructions, and print-friendly CSS
+- **Default Vibe Architect** — Welcome screen now opens to Vibe Architect by default (was Prompt Enhancer)
+- **Vibe Architect Dedicated Route** — Full-screen immersive mode at `/vibe` with `vibeMode` prop
+
+### Changed
+- **General Agent Plain Chat** — General mode no longer triggers plan/code flow, now works as plain chat
+- **SEO Follow-up Fix** — Non-visual agents (SEO, content, SMM) preserve existing canvas on follow-up messages
+
+### Technical Details
+- Files modified: 3 (AIAssist.tsx, page.tsx)
+- Files added: 2 (seo-report.ts, vibe/page.tsx)
+
+(https://semver.org/spec/v2.0.0.html).
 
 ## [1.9.0] - 2026-03-18 21:05 UTC