WebLens — AI Technical Health Auditor per Raghav

WebLens is an autonomous technical website auditor that inspects websites across 5 critical dimensions:
1. AI Search Engine Discoverability & llms.txt Readiness
2. WCAG 2.1 AA Visual Accessibility & Contrast
3. Page-Level Engagement & Visual Friction
4. Crawl-Render Diagnostics & DOM Hydration
5. Freshness & Content Corroboration

Features:
- Sub-500ms Instant Pre-Flight Security & Header evaluation (HSTS, CSP, X-Frame-Options)
- Real-time Server-Sent Events (SSE) telemetry streaming
- Standardized findings with measured evidence tiers (Tier 1/2 vs Tier 4 heuristic)
- One-click ready-to-paste AI defect remediation prompts
- Native Firefox sidebar integration