## Summary
- add an optional linked property selector when creating loan accounts
in both the main create dialog and onboarding
- validate that only the current user's unlinked real-estate accounts
can be selected and persist the reciprocal link after loan creation
- expose linked property state in shared account props and cover the new
flow with focused loan feature tests
## Testing
- php artisan test --compact tests/Feature/LoanTest.php
- vendor/bin/pint --dirty --format agent
## Summary
- **Bug**: The `loans:generate-balances` command called
`getBalanceAtDate()` which always recalculated the remaining balance
from the **original loan parameters** (`original_amount`,
`annual_interest_rate`, `loan_term_months`, `start_date`), completely
ignoring existing actual balance entries. When the real balance was
lower than the theoretical amortization schedule (e.g. user made extra
payments), the auto-generated balance would **jump up** instead of
continuing to decrease.
- **Example**: Account `019d0b33-d3c5-7110-9033-51155ac93219` had a real
balance of ~4,489,670 (March 2026), but the command generated 5,700,356
(April 2026) — a jump **up** of ~1.2M cents instead of the expected ~16K
decrease.
- **Fix**: `getBalanceAtDate()` now checks for the latest
`AccountBalance` entry on or before the target date and projects forward
from it, falling back to the theoretical formula only when no entries
exist. This matches the method's own documented behavior and aligns with
how `generateProjection()` already works.
## Testing
Added 4 new tests:
- Projects from existing balance entries instead of original loan params
- Returns existing balance when target date is in the same month
- Generates correct monthly balance when existing entries differ from
theoretical
- All 44 existing loan tests continue to pass
## Summary
- Adds loan detail tracking (interest rate, term, start date, original
amount) to loan-type accounts, following the existing
`real_estate_details` pattern
- Implements `LoanAmortizationService` with standard amortization math
to automatically project month-to-month balance evolution
- Shows projected future balances as a dashed line on the account
balance chart, visually distinct from historical data
- Adds a scheduled command (`loans:generate-balances`) to auto-generate
monthly balance entries for loan accounts
- Includes 36 tests (10 unit for pure math, 26 feature for CRUD, API
projections, command, and authorization)
## Changes
### Backend
- **Migration**: `loan_details` table (UUID PK, unique `account_id` FK,
interest rate, term, start date, original amount)
- **LoanDetail model** + factory with `Account::loanDetail()` HasOne
relationship
- **LoanAmortizationService**: `calculateMonthlyPayment`,
`calculateRemainingBalance`, `generateProjection`, `projectFromBalance`,
`calculateRemainingMonths`, `getBalanceAtDate`
- **GenerateMonthlyLoanBalances** command: runs monthly on 1st, skips
existing entries
- **LoanDetailController**: PATCH endpoint for editing loan details from
show page
- **Settings\AccountController**: creates/updates `LoanDetail` on
store/update
- **DashboardAnalyticsController**: appends projected data points with
`projected: true` flag
- **Validation**: loan-specific rules in StoreAccountRequest and
UpdateAccountRequest
### Frontend
- **AccountForm**: loan fields (rate, term, start date, original amount)
shown when `type === 'loan'`
- **Create/Edit dialogs**: pass loan data fields in POST/PATCH payloads
- **Show page**: `LoanDetailsCard` component with edit/read modes,
computed monthly payment and remaining months
- **Balance chart**: new `ComposedChart` branch with dashed `Line`
overlay for projected data points
- **Types**: `LoanDetail` interface in `account.ts`
Víctor Falcón