DashBoard/openspec/changes/archive/2026-02-07-dashboard-vite-complete-migration/specs/frontend-compute-shift/spec.md

ADDED Requirements

Requirement: Display-Layer Computation SHALL be Shifted to Frontend Safely

The system SHALL move eligible display-layer computations from backend to frontend while preserving existing business behavior.

Scenario: Equivalent metric output

• WHEN frontend-computed metrics are produced for a supported page
• THEN output values MUST match baseline backend results within defined rounding rules

Requirement: Compute Shift MUST be Verifiable by Parity Fixtures

Each migrated computation MUST have parity fixtures comparing baseline and migrated outputs.

Scenario: Parity test gating

• WHEN a compute-shifted module is changed
• THEN parity checks MUST run and fail the migration gate if output differs beyond tolerance