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.Infrastructure/Services/InventoryAiLookupService.cs

@@ -407,7 +407,7 @@ Rules:
     /// known product page URL without running a Serper search. Used after a catalog hit
     /// to augment the catalog record with fields the catalog table doesn't store.
     /// </summary>
-    public async Task<InventoryAiLookupResult> LookupByUrlAsync(string url, string? colorName)
+    public async Task<InventoryAiLookupResult> LookupByUrlAsync(string url, string? colorName, string? tdsFallbackUrl = null)
     {
         var apiKey = _config["AI:Anthropic:ApiKey"];
         if (string.IsNullOrWhiteSpace(apiKey) || apiKey.StartsWith("your-"))
@@ -484,6 +484,28 @@ Rules:
             };
 
             ApplyPowderFallbacks(result);
+
+            // TDS fallback: use the TDS URL discovered from the product page, or the one the
+            // caller passed in (e.g. known from catalog). Try it when cure specs are still missing.
+            var effectiveTdsUrl = result.TdsUrl ?? tdsFallbackUrl;
+            if (!string.IsNullOrWhiteSpace(effectiveTdsUrl) &&
+                (result.CureTemperatureF == null || result.CureTimeMinutes == null))
+            {
+                try
+                {
+                    var tds = await FetchTdsCureSpecsAsync(effectiveTdsUrl!, colorName);
+                    if (tds.Success)
+                    {
+                        if (result.CureTemperatureF == null) result.CureTemperatureF = tds.CureTemperatureF;
+                        if (result.CureTimeMinutes  == null) result.CureTimeMinutes  = tds.CureTimeMinutes;
+                    }
+                }
+                catch (Exception ex)
+                {
+                    _logger.LogWarning(ex, "TDS fallback failed for {Url}", tdsFallbackUrl);
+                }
+            }
+
             return result;
         }
         catch (Exception ex)