feat: v1.2.0 - Analytics dashboard & comprehensive docs

Dashboard:
- Personal baselines section with rolling averages, ranges, status
- Detected patterns section with correlations, trends, risk scores
- Empty state guidance for analytics requirements

Documentation:
- New Integration Guide for Laravel/SaaS consumers
- LLM-friendly llms.txt for AI tools
- Mermaid diagrams replacing ASCII art
- Updated index with all links

Version bump to 1.2.0

Stu Mason + AI <me@stumason.dev>

Author: StuMason

CHANGELOG.md

@@ -9,6 +9,30 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ---
 
+## [1.2.0] - 2026-01-13
+
+### Added
+
+**Admin Dashboard Analytics**
+- Personal Baselines section displaying:
+  - All calculated baselines (HRV, sleep score, resting HR, training load, etc.)
+  - Rolling averages (7-day, 30-day) with percentage change from baseline
+  - Min/max range and sample counts
+  - Status indicators (ready, partial, insufficient)
+- Detected Patterns section displaying:
+  - Correlations (sleep-HRV, training-recovery, activity-sleep)
+  - Composite scores (overtraining risk, recovery readiness)
+  - Trends (HRV, sleep, fitness)
+  - Statistical significance levels (high/medium/low)
+  - Pattern interpretations and contributing factors
+- Empty state guidance explaining analytics requirements (7+ days of data)
+
+### Documentation
+- This release makes analytics features visible in the admin dashboard
+- Analytics power the `/users/{user_id}/insights` API endpoint for downstream consumers
+
+---
+
 ## [1.1.0] - 2026-01-13
 
 ### Added
@@ -140,6 +164,7 @@ First stable release of polar-flow-server - a self-hosted health analytics serve
 - Database models for Polar data types
 - Sync service foundation
 
+[1.2.0]: https://github.com/StuMason/polar-flow-server/compare/v1.1.0...v1.2.0
 [1.1.0]: https://github.com/StuMason/polar-flow-server/compare/v1.0.0...v1.1.0
 [1.0.0]: https://github.com/StuMason/polar-flow-server/compare/v0.2.0...v1.0.0
 [0.2.0]: https://github.com/StuMason/polar-flow-server/compare/v0.1.0...v0.2.0

docs/index.md

@@ -37,10 +37,14 @@ Polar devices collect health data: sleep, HRV, activity, exercises. The Polar AP
 
 ## Architecture
 
-```
-Polar API → polar-flow-sdk → Sync Service → Database → Analytics → REST API
-                                                                        ↓
-                                                              Dashboard/App
+```mermaid
+flowchart LR
+    A[Polar API] --> B[polar-flow SDK]
+    B --> C[Sync Service]
+    C --> D[(Database)]
+    D --> E[Analytics Engine]
+    E --> F[REST API]
+    F --> G[Dashboard/App]
 ```
 
 Python data analytics engine:
@@ -107,7 +111,9 @@ curl -X POST \
 ## Links
 
 - [Quick Start Guide](quickstart.md)
+- [Integration Guide](integration.md) - Laravel/SaaS integration
 - [Architecture](architecture.md)
 - [API Reference](api/overview.md)
 - [GitHub Repository](https://github.com/StuMason/polar-flow-server)
 - [polar-flow SDK](https://stumason.github.io/polar-flow/)
+- [LLM-Friendly Docs](https://raw.githubusercontent.com/StuMason/polar-flow-server/main/llms.txt) - Aggregated text for AI tools