feat: perf optimisation

project-intelligence/navigation.md

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+<!-- Context: project-intelligence/navigation | Priority: critical | Version: 1.0 | Updated: 2026-02-27 -->
+
+# Project Intelligence
+
+Quick overview of project patterns and context files.
+
+## Quick Routes
+
+| File | Description | Priority |
+|------|-------------|----------|
+| [technical-domain.md](./technical-domain.md) | Tech stack, architecture, patterns | critical |
+| [business-domain.md](./business-domain.md) | Business logic, domain model | high |
+| [decisions-log.md](./decisions-log.md) | Architecture decisions | medium |
+| [living-notes.md](./living-notes.md) | Development notes | low |
+| [business-tech-bridge.md](./business-tech-bridge.md) | Business-technical mapping | medium |
+
+## All Files Complete |
+
+## Usage
+
+- **AI Agents**: Read technical-domain.md for code patterns
+- **New Developers**: Start with technical-domain.md + business-domain.md
+- **Architecture**: Check decisions-log.md for rationale