Hide churned trial accounts from company/health screens by default

- Companies list and Company Health now hide Expired/Canceled accounts
  whose subscription ended 14+ days ago; show/hide toggle via banner
- KPI cards on Company Health exclude churned tenants when hidden
- showChurned param threads through sort, pagination, search, and filter forms
- Powder catalog: fix missing UnitPrice on user-contributed entries;
  add back-sync to fill catalog gaps on existing matches; wire
  AiAugmentFromUrl and manual inventory Create into catalog contribute path

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

src/PowderCoating.Web/Controllers/CompanyHealthController.cs

@@ -45,18 +45,30 @@ public class CompanyHealthController : Controller
     /// user's risk/search filters, so the KPI cards always show platform-wide totals.
     /// </para>
     /// </summary>
-    public async Task<IActionResult> Index(string? risk, string? search, bool configIssuesOnly = false)
+    public async Task<IActionResult> Index(string? risk, string? search, bool configIssuesOnly = false, bool showChurned = false)
     {
         var now = DateTime.UtcNow;
         var d30 = now.AddDays(-30);
         var d90 = now.AddDays(-90);
+        var churnedCutoff = now.AddDays(-14);
 
         // One query per signal — all keyed by CompanyId
-        var companies = await _db.Companies
+        var allCompanies = await _db.Companies
             .AsNoTracking().IgnoreQueryFilters()
             .Where(c => !c.IsDeleted)
             .ToListAsync();
 
+        var churnedCount = allCompanies.Count(c =>
+            (c.SubscriptionStatus == SubscriptionStatus.Expired || c.SubscriptionStatus == SubscriptionStatus.Canceled)
+            && c.SubscriptionEndDate.HasValue && c.SubscriptionEndDate.Value < churnedCutoff);
+
+        var companies = showChurned
+            ? allCompanies
+            : allCompanies.Where(c =>
+                !((c.SubscriptionStatus == SubscriptionStatus.Expired || c.SubscriptionStatus == SubscriptionStatus.Canceled)
+                  && c.SubscriptionEndDate.HasValue && c.SubscriptionEndDate.Value < churnedCutoff))
+              .ToList();
+
         var lastLogins = await _db.Users
             .AsNoTracking().IgnoreQueryFilters()
             .Where(u => u.LastLoginDate != null)
@@ -163,6 +175,8 @@ public class CompanyHealthController : Controller
         ViewBag.Risk              = risk;
         ViewBag.Search            = search;
         ViewBag.ConfigIssuesOnly  = configIssuesOnly;
+        ViewBag.ShowChurned       = showChurned;
+        ViewBag.ChurnedCount      = churnedCount;
 
         if (!string.IsNullOrWhiteSpace(search))
             all = all.Where(h =>