# Tax & Notifications Implementation Plan

## Philosophy: 80/20 Rule - Real Value, Not Menu-ing

WooNooW provides elegant UX for 80% of daily use cases.
The 20% advanced/rare features stay in WooCommerce.

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## Tax Settings - What to Build

### Core Features (80% use cases):

1. **Enable/Disable Tax Calculation**
   - Simple toggle
   - Clear explanation

2. **Tax Rates by Country/State**
   - Add/Edit/Delete tax rates
   - Country selector
   - State selector (for countries with states)
   - Rate percentage input
   - Tax class selector (Standard, Reduced, Zero)

3. **Prices Include Tax Toggle**
   - "Prices entered with tax" vs "without tax"
   - Clear explanation

4. **Display Settings**
   - Show prices in shop: including/excluding tax
   - Show prices in cart: including/excluding tax
   - Display suffix (e.g., "incl. VAT")

### Advanced Features (Link to WooCommerce):

- Complex tax classes (rare)
- Compound taxes (rare)
- Tax based on shipping vs billing (advanced)
- Custom tax tables (very rare)

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## Notifications Settings - What to Build

### Core Features (80% use cases):

1. **Email Enable/Disable**
   - Toggle for each email type
   - Already implemented ✅

2. **Edit Email Subjects**
   - Inline editing of subject lines
   - Variables support ({order_number}, {site_title})

3. **Sender Configuration**
   - "From" name
   - "From" email address

4. **Email Preview**
   - Preview button for each email
   - Opens WooCommerce preview

### Advanced Features (Link to WooCommerce):

- Full HTML template editing (advanced)
- Custom email templates (developer)
- Header/footer customization (advanced)
- Additional recipients (rare)

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## Implementation Priority

### Phase 1: Tax Rates (High Impact)
1. Backend: Tax rates CRUD API
2. Frontend: Tax rates list + Add/Edit dialog
3. Frontend: Enable/disable toggle
4. Frontend: Prices include tax toggle

### Phase 2: Email Subjects (High Impact)
1. Backend: Get/update email settings API
2. Frontend: Sender name/email inputs
3. Frontend: Inline subject editing
4. Frontend: Preview links

### Phase 3: Tax Display Settings (Medium Impact)
1. Frontend: Display settings card
2. Backend: Save display preferences

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## API Endpoints Needed

### Tax:
- GET /settings/tax/rates
- POST /settings/tax/rates
- PUT /settings/tax/rates/{id}
- DELETE /settings/tax/rates/{id}
- GET /settings/tax/config
- POST /settings/tax/config

### Notifications:
- GET /settings/notifications/emails
- POST /settings/notifications/emails/{id}
- GET /settings/notifications/sender
- POST /settings/notifications/sender