# Phase 10.12 — Lab & Radiology Recovery

## Objective

Restore the legacy selected-branch laboratory and radiology functions in the executive dashboard with exact Oracle parity, executive readability, real browser rendering verification, and mandatory regression protection for all previously closed modules.

## Implemented capabilities

- Lab & Radiology route activated.
- Year comparison mode.
- Custom same-year date-range mode.
- Laboratory KPI and monthly trend.
- Radiology KPI and monthly trend.
- Combined diagnostic activity and radiology share.
- Data-driven executive insight.
- Monthly diagnostic matrix.
- Explicit chart states: pending, rendered, empty, error.
- Independent legacy execution path.
- Four exact live parity checks: `plts_s` and `prts_s` across year and range modes.
- Actual browser rendering gate for two charts.

## Legacy boundary

`plts_s` and `prts_s` are implemented pending live gate. Multi-branch `plts` and `prts` remain PARTIAL until exact multi-branch parity is proven.

## Database safety

No DDL or DML is included. Oracle write operations: `NONE`.
