feat: v1.4.0 — review code, web search grounding, responsive preview

New features:
- Review Code button sends generated code back to AI for review
- Web search grounding via SearXNG (toggle in toolbar, enriches prompts)
- Responsive preview with device size selector (Full/Desktop/Tablet/Mobile)
- /api/search proxy route

Fixes:
- Model selector text color now white on dark theme
- Post-coding button text overflow (shorter labels + min-w-0)
- Duplicate activateArtifact button suppressed when action row shows

CHANGELOG.md

@@ -5,6 +5,35 @@ 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).
 
+## [1.4.0] - 2026-03-18 19:57 UTC
+
+### Added
+- **Review Code Button** — Post-coding action to send generated code back to AI for review
+  - `reviewCode()` function sends code with review-focused prompt
+  - Emerald-green "Review" button alongside Preview and Modify
+  - 3-column post-coding action grid: Preview / Review / Modify
+- **Web Search Grounding** — Enrich AI prompts with live web search results
+  - `lib/services/search-api.ts` — SearXNG public API wrapper with 4 instance fallback
+  - `/api/search` route — server-side search proxy endpoint
+  - Toggle button in toolbar to enable/disable (amber highlight when active)
+  - Shows "Searching the web..." status while fetching
+  - Appends top 5 results as `[WEB SEARCH CONTEXT]` to user prompt
+- **Responsive Preview** — Device size selector in canvas panel
+  - Full / Desktop (1280px) / Tablet (768px) / Mobile (375px) buttons
+  - Centered device frame with border, shadow, and scroll on overflow
+  - Only visible in preview mode, below Live Render / Inspect Code tabs
+
+### Fixed
+- **Model selector text color** — Option text now white on dark theme (`bg-[#0b1414] text-white`)
+- **Button text overflow** — Shortened labels (Preview/Review/Modify), added `min-w-0` for proper truncation
+- **Duplicate activateArtifact button** — Original button now hides when post-coding action row is shown
+
+### Technical Details
+- Files modified: 1 (AIAssist.tsx: +85/-11 lines)
+- Files added: 2 (`lib/services/search-api.ts`, `app/api/search/route.ts`)
+- New state: `deviceSize`, `webSearchEnabled`
+- New function: `reviewCode()`
+
 ## [1.3.0] - 2026-03-18 18:51 UTC
 
 ### Added