# Storage Schema — IndexedDB (idb)

## DB Name
- glowtrack

## Versioning
- Start at version 1; bump on schema changes
- Provide forward-only migrations for v1 → v2 → ...

## Object Stores
- settings (key: 'singleton')
  - value: GridSettings
- habits (keyPath: 'id')
  - indexes: by_type (type)
- days (keyPath: 'date')
  - value: DayTile without entries
- entries (keyPath: 'id')
  - indexes:
    - by_date (date)
    - by_habit (habitId)

## Transactions
- Log habit: readwrite on entries, days (update netScore)
- Edit/delete: readwrite on entries, days
- Import JSON: version check, bulk put within a single transaction per store

## Migrations
- v1: create stores and indexes above
- Future: add derived caches (e.g., monthly aggregates) — must be rebuildable

## Data Integrity
- Enforce unique DayTile.date
- Recompute DayTile.netScore after entry mutations
- Maintain referential link of HabitEntry.habitId to habits store