feat: SEO web audit, URL fetching, auto web search for SEO mode (v1.6.0)

CHANGELOG.md

@@ -5,6 +5,26 @@ 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).
 
+## [1.6.0] - 2026-03-18 20:34 UTC
+
+### Added
+- **SEO Web Audit** — SEO agent can now fetch and analyze live websites
+  - `/api/fetch-url` route extracts: title, meta tags, headings (h1-h6), links (internal/external), images (alt text coverage), canonical URL, OG tags, text content length
+  - Auto-detects URLs in user input when SEO agent is active
+  - Pre-fetches page data before sending to AI for comprehensive audit reports
+  - Supports up to 2 URLs per request
+- **SEO Auto Web Search** — When SEO agent is active and no URL is provided, web search is automatically triggered
+  - Uses same SearXNG infrastructure as manual web search toggle
+  - No manual toggle needed in SEO mode
+- **Updated SEO Agent Prompt** — All 4 AI services now instruct SEO agent about web audit and search capabilities
+  - Added `[WEB_AUDIT:url]` and `[WEB_SEARCH:query]` tool markers
+  - Added "WEB TOOLS" section to system prompts
+
+### Technical Details
+- Files modified: 5 (AIAssist.tsx, qwen-oauth.ts, ollama-cloud.ts, zai-plan.ts, openrouter.ts)
+- Files added: 1 (`app/api/fetch-url/route.ts`)
+- New API endpoint: `GET /api/fetch-url?url=https://example.com`
+
 ## [1.5.0] - 2026-03-18 20:29 UTC
 
 ### Added