## Summary
- Replace `subMonths()` with `subMonthsNoOverflow()` across controllers,
commands, and tests to prevent date overflow on months with 31 days
- On Jan 31, `subMonths(2)` overflows: Nov 31 doesn't exist → Carbon
rolls forward to Dec 1, producing wrong date ranges and off-by-one month
counts
## Root cause
Carbon's `subMonths()` allows day overflow. When the target month has
fewer days than the source date, it rolls into the next month. For
example:
- `2026-01-31 subMonths(2)` → Nov 31 → **2025-12-01** (expected Nov 30)
- `2026-01-31 subMonths(11)` → Feb 31 → **2025-03-03** (expected Feb 28)
`subMonthsNoOverflow()` clamps to the last valid day of the target month
instead.
## Files changed
- `app/Http/Controllers/Api/CashflowAnalyticsController.php` — cashflow
trend start date calculation
- `app/Console/Commands/ResetDemoAccountCommand.php` — balance history
date generation (was causing duplicate `balance_date` entries)
- `tests/Feature/AccountControllerTest.php` — balance evolution `from`
param
- `tests/Feature/CashflowAnalyticsTest.php` — transaction date
generation in loop
- `tests/Feature/DashboardAnalyticsTest.php` — net worth evolution
`from` param
## Test plan
- [x] `account balance evolution returns data` — expects 3 months, was
getting 2
- [x] `cashflow trend returns monthly data` — expects 3 months, was
getting 2
- [x] `cashflow trend defaults to 12 months` — expects 12 months, was
getting 11
- [x] `net worth evolution returns monthly data points` — expects 3
months, was getting 2
- [x] `demo:reset creates demo user` — was throwing
UniqueConstraintViolation on duplicate balance dates
## Summary
Implements a complete user onboarding flow that guides new users through
setting up their account after registration.
## Features
- **Step-by-step wizard UI** with progress indicator and smooth
animations
- **E2E Encryption setup** with password strength indicator and
explanation of how encryption works
- **Account creation** supporting all account types (checking, savings,
credit card, investment, pension)
- **Category customization** with explanation of category types
(expenses, income, transfer)
- **Smart rules explanation** covering why there is no AI
auto-categorization (privacy & E2EE)
- **Transaction/balance import** based on account type
- **Sync integration** to ensure data consistency with backend
## Flow Diagram
```mermaid
flowchart TD
A[User Registration] --> B[Welcome]
B --> E[Encryption Explained]
E --> C{Has encryption key?}
C -->|No|F[Encryption Setup]
C -->|Yes|G{Has Existing Accounts?}
G -->|Yes| H[Show Existing Accounts]
G -->|No| I[Create First Account]
H --> J[Continue]
I --> K{Account Type?}
K -->|Checking/Savings/Credit Card| L[Import Transactions]
K -->|Investment/Pension| M[Import Balances]
J --> N[Category Types Explanation]
L --> N
M --> N
N --> O[Customize Categories]
O --> P[Smart Rules Explanation]
P --> Q[More Accounts?]
Q -->|Add More| I
Q -->|Finish| R[Complete]
R --> S[Redirect to Dashboard]
S --> T{Subscribed?}
T -->|No| U[Subscribe Page]
T -->|Yes| V[Dashboard]
```
## Technical Changes
### Backend
- Added `onboarded_at` field to users table with migration
- Created `EnsureOnboardingComplete` middleware for redirect logic
- Created `OnboardingController` with index and complete actions
- Custom `RegisterResponse` to redirect new users to onboarding
- Updated `AccountController::store` to return JSON for fetch requests
### Frontend
- `OnboardingLayout` - fullscreen layout with step progress
- `useOnboardingState` hook - manages step navigation and state
- 12 step components for each onboarding screen
- Backend sync after account creation and imports
### Tests
- Feature tests for onboarding middleware
- Updated existing tests to use `onboarded()` factory state
Víctor Falcón