v3 port. Invoice/estimate/recurring creation and update accepted total,
sub_total, tax and due_amount straight from the request with no recalculation,
letting a client persist financial totals that don't match the line items
(and corrupt the invoice update due-amount/paid-amount logic which keyed off
the client total).
- Adds App\Support\DocumentTotals (mirrors the front-end calc) trusting only
price/quantity/discounts/tax-line amounts.
- getInvoicePayload/getEstimatePayload/getRecurringInvoicePayload override the
client totals; the shared DocumentItemService::createItems recomputes each
item total; InvoiceService::update keys its due-amount logic off the
recomputed total.
Adds DocumentTotals unit tests + a feature test proving a tampered invoice
total is ignored; existing create/update tests no longer assert the now
server-authoritative derived totals.
Two follow-ups to the Services reorg that landed in 6d1816bd.
**Documents → Document** (singular). Documents/ was the only plural subdir in app/Services/ — every other bucket (Company, Mail, Module, Pdf, Storage, Update, ExchangeRate) was singular. Renaming to Document/ normalizes the whole tree.
**ExchangeRate → Integrations/ExchangeRate**. Introduces Integrations/ as an umbrella for external-service adapter subsystems. Exchange rate providers move in first; AI providers, payment gateways, and any other driver-pattern integrations land as sibling subdirs (Integrations/Ai/, Integrations/Payment/) without another reorg. Integrations/ was chosen over Providers/ to avoid conceptual collision with Laravel's app/Providers/ — 'check the providers' shouldn't be ambiguous.
17 files moved, 21 consumer files rewritten to point at the new namespaces via literal-string replacement (same approach as the previous reorg). 350 tests pass, Pint clean.
