Fix account dropdowns: vendor auto-select + sub-type filtering

Inventory vendor auto-select: match the dropdown off the Manufacturer
field (almost always populated and equal to the vendor for the shop's
distributors) instead of the AI's price-conditional vendorName, which was
only returned when a price was scraped. Centralizes the logic in a shared
inventory-vendor-match.js used by catalog lookup, AI lookup, label scan,
and manual entry; skips brands sold by multiple distributors (PPG, KP
Pigments) so those stay manual.

Account dropdowns filtered by sub-type now filter by parent AccountType,
so accounts a company classifies under a non-standard sub-type still
appear: Inventory account (Asset), AP account (Liability), pay-from/bank
and Bank Reconciliation pickers (Asset + Liability).

Deposit account is now a user-selectable dropdown on the Job and Quote
deposit modals (Asset + Liability accounts) instead of a silent auto-pick
of the first Checking/Cash account; falls back to the old behavior when
left blank, and validates the chosen account belongs to the company.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/PowderCoating.Web/Controllers/BillsController.cs

@@ -452,12 +452,12 @@ public class BillsController : Controller
         var dto = _mapper.Map<BillDto>(bill);
 
         // Payment form defaults
+        // Payment sources: filter by parent AccountType (Asset or Liability), not sub-type,
+        // so accounts a company classified under a different sub-type still appear.
         var bankAccounts = (await _unitOfWork.Accounts.FindAsync(
             a => a.CompanyId == bill.CompanyId &&
-                (a.AccountSubType == AccountSubType.Cash ||
-                 a.AccountSubType == AccountSubType.Checking ||
-                 a.AccountSubType == AccountSubType.Savings ||
-                 a.AccountSubType == AccountSubType.CreditCard)))
+                (a.AccountType == AccountType.Asset ||
+                 a.AccountType == AccountType.Liability)))
             .OrderBy(a => a.AccountNumber)
             .ToList();