feat: Vibe Architect dedicated mode, SEO follow-up fix (v1.8.0)

CHANGELOG.md

@@ -5,6 +5,25 @@ 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).
 
+## [1.8.0] - 2026-03-18 21:02 UTC
+
+### Added
+- **Vibe Architect Dedicated Mode** — Full-screen immersive AI coding experience
+  - New route: `/vibe` ([rommark.dev/tools/promptarch/vibe/](https://rommark.dev/tools/promptarch/vibe/))
+  - No sidebar, no navigation — just AI Assist in full screen
+  - Rebranded as "Vibe Architect" with dedicated messaging
+  - `vibeMode` prop on AIAssist component for label overrides
+
+### Fixed
+- **SEO follow-up preview** — Canvas no longer breaks when asking follow-up questions after SEO audit
+  - `isModifying` overlay only triggers for visual agents (code, web, app, design) — not SEO/content/SMM
+  - Non-visual agent follow-ups preserve existing canvas if no new preview is generated
+
+### Technical Details
+- Files added: 1 (`app/vibe/page.tsx`)
+- Files modified: 1 (AIAssist.tsx: +8/-3 lines)
+- New prop: `vibeMode` on AIAssist component
+
 ## [1.7.0] - 2026-03-18 20:44 UTC
 
 ### Added