Ad-hoc quote email, accounting improvements, AI lookup fix, and misc service updates

- Quotes: ad-hoc email modal on Quote Details lets staff send to an address not on file;
  QuotesController passes overrideEmail through to NotificationService
- Quotes/Details view: SMS consent display, email/SMS send button state based on consent
- Accounting module: AccountingDisplayHelpers for consistent ledger formatting;
  AccountsController + Accounts views improvements; AccountingEnums additions
- Bills/Expenses: AI account categorization fixes in BillsController and ExpensesController
- InventoryAiLookupService: TDS cure fallback no longer fires on AiAugmentFromUrl path
  (LookupByUrlAsync already has it built in — was double-fetching)
- PdfService: quote/invoice PDF updates
- PricingCalculationService: minor pricing logic fix
- QuoteProfile: mapping updates for new quote fields
- ApplicationDbContextModelSnapshot: catches up to all 4 migrations in this branch

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/PowderCoating.Web/Views/Accounts/Ledger.cshtml

@@ -29,10 +29,11 @@
         _                       => "bi-journal"
     };
 
-    string typeLabel = Model.AccountType == AccountType.CostOfGoods ? "Cost of Goods Sold" : Model.AccountType.ToString();
+    string typeLabel = Model.AccountType.ToDisplayName();
 
     // Derive from AccountSubType (more reliable than AccountType which users can misconfigure)
     bool normalDebitBalance =
+        Model.AccountSubType == AccountSubType.Cash ||
         Model.AccountSubType == AccountSubType.Checking ||
         Model.AccountSubType == AccountSubType.Savings ||
         Model.AccountSubType == AccountSubType.AccountsReceivable ||
@@ -71,7 +72,7 @@
     <div>
         <p class="text-muted mb-0">
             <span class="badge bg-@typeColor bg-opacity-75 me-1">@typeLabel</span>
-            <span class="text-muted small">@Model.AccountSubType · @balanceLabel</span>
+            <span class="text-muted small">@Model.AccountSubType.ToDisplayName() · @balanceLabel</span>
         </p>
     </div>
     <div class="ms-auto">