diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 2c5b2d3d..ad0c8b8f 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -26,7 +26,16 @@ jobs:
         run: npm ci
 
       - name: Lint and format check
-        run: npm run check
+        run: npx biome check .
+
+      - name: Validate pages registry
+        run: npm run validate-pages
+
+      - name: Validate i18n keys
+        run: npm run validate:i18n
+
+      - name: TypeScript type check
+        run: npm run typecheck
 
   build:
     runs-on: ubuntu-latest
diff --git a/modules/AuditLogs/src/SimpleModule.AuditLogs/Pages/Browse.tsx b/modules/AuditLogs/src/SimpleModule.AuditLogs/Pages/Browse.tsx
index 853f49ce..3162f271 100644
--- a/modules/AuditLogs/src/SimpleModule.AuditLogs/Pages/Browse.tsx
+++ b/modules/AuditLogs/src/SimpleModule.AuditLogs/Pages/Browse.tsx
@@ -415,8 +415,8 @@ export default function Browse({ result, filters }: Props) {
           <div className="flex flex-col items-center gap-2 sm:flex-row sm:justify-between">
             <span className="text-sm text-text-muted">
               {t(AuditLogsKeys.Browse.Showing, {
-                start: startItem,
-                end: endItem,
+                start: String(startItem),
+                end: String(endItem),
                 total: result.totalCount.toLocaleString(),
               })}
             </span>
diff --git a/modules/AuditLogs/src/SimpleModule.AuditLogs/Pages/Detail.tsx b/modules/AuditLogs/src/SimpleModule.AuditLogs/Pages/Detail.tsx
index cffd9698..f5ee2057 100644
--- a/modules/AuditLogs/src/SimpleModule.AuditLogs/Pages/Detail.tsx
+++ b/modules/AuditLogs/src/SimpleModule.AuditLogs/Pages/Detail.tsx
@@ -173,7 +173,7 @@ export default function Detail({ entry, correlated }: Props) {
     <TooltipProvider>
       <PageShell
         className="space-y-4 sm:space-y-6"
-        title={t(AuditLogsKeys.Detail.Title, { id: entry.id })}
+        title={t(AuditLogsKeys.Detail.Title, { id: String(entry.id) })}
         actions={
           <Button variant="secondary" onClick={() => router.get('/audit-logs/browse')}>
             {t(AuditLogsKeys.Detail.BackToBrowse)}
@@ -181,7 +181,7 @@ export default function Detail({ entry, correlated }: Props) {
         }
         breadcrumbs={[
           { label: t(AuditLogsKeys.Detail.BreadcrumbAuditLogs), href: '/audit-logs/browse' },
-          { label: t(AuditLogsKeys.Detail.BreadcrumbEntry, { id: entry.id }) },
+          { label: t(AuditLogsKeys.Detail.BreadcrumbEntry, { id: String(entry.id) }) },
         ]}
       >
         {/* Overview Card */}
@@ -382,7 +382,7 @@ export default function Detail({ entry, correlated }: Props) {
               <CardTitle>
                 {t(AuditLogsKeys.Detail.CorrelatedTitle)}
                 <span className="ml-2 text-sm font-normal text-text-muted">
-                  {t(AuditLogsKeys.Detail.CorrelatedRelated, { count: correlated.length })}
+                  {t(AuditLogsKeys.Detail.CorrelatedRelated, { count: String(correlated.length) })}
                 </span>
               </CardTitle>
             </CardHeader>
diff --git a/modules/BackgroundJobs/src/SimpleModule.BackgroundJobs/Pages/Detail.tsx b/modules/BackgroundJobs/src/SimpleModule.BackgroundJobs/Pages/Detail.tsx
index 8cdeca05..d09287de 100644
--- a/modules/BackgroundJobs/src/SimpleModule.BackgroundJobs/Pages/Detail.tsx
+++ b/modules/BackgroundJobs/src/SimpleModule.BackgroundJobs/Pages/Detail.tsx
@@ -82,7 +82,7 @@ export default function Detail({ job }: Props) {
               <Badge variant={stateVariant[job.state] ?? 'default'}>{job.state}</Badge>
               {job.retryCount > 0 && (
                 <span className="text-sm text-text-muted">
-                  {t(BackgroundJobsKeys.Detail.RetryCount, { count: job.retryCount })}
+                  {t(BackgroundJobsKeys.Detail.RetryCount, { count: String(job.retryCount) })}
                 </span>
               )}
             </div>
@@ -138,7 +138,7 @@ export default function Detail({ job }: Props) {
         <Card className="mt-4 sm:mt-6">
           <CardHeader>
             <CardTitle>
-              {t(BackgroundJobsKeys.Detail.LogsCard, { count: job.logs.length })}
+              {t(BackgroundJobsKeys.Detail.LogsCard, { count: String(job.logs.length) })}
             </CardTitle>
           </CardHeader>
           <CardContent>
diff --git a/modules/BackgroundJobs/src/SimpleModule.BackgroundJobs/Pages/List.tsx b/modules/BackgroundJobs/src/SimpleModule.BackgroundJobs/Pages/List.tsx
index a03b9487..77e30005 100644
--- a/modules/BackgroundJobs/src/SimpleModule.BackgroundJobs/Pages/List.tsx
+++ b/modules/BackgroundJobs/src/SimpleModule.BackgroundJobs/Pages/List.tsx
@@ -41,7 +41,7 @@ export default function List({ jobs }: Props) {
   return (
     <DataGridPage
       title={t(BackgroundJobsKeys.List.Title)}
-      description={t(BackgroundJobsKeys.List.TotalCount, { count: jobs.totalCount })}
+      description={t(BackgroundJobsKeys.List.TotalCount, { count: String(jobs.totalCount) })}
       data={jobs.items}
       emptyTitle={t(BackgroundJobsKeys.List.EmptyTitle)}
       emptyDescription={t(BackgroundJobsKeys.List.EmptyDescription)}
diff --git a/modules/BackgroundJobs/src/SimpleModule.BackgroundJobs/Pages/Recurring.tsx b/modules/BackgroundJobs/src/SimpleModule.BackgroundJobs/Pages/Recurring.tsx
index 3c1c6c96..852c30b2 100644
--- a/modules/BackgroundJobs/src/SimpleModule.BackgroundJobs/Pages/Recurring.tsx
+++ b/modules/BackgroundJobs/src/SimpleModule.BackgroundJobs/Pages/Recurring.tsx
@@ -53,7 +53,7 @@ export default function Recurring({ jobs }: Props) {
     <>
       <DataGridPage
         title={t(BackgroundJobsKeys.Recurring.Title)}
-        description={t(BackgroundJobsKeys.Recurring.Description, { count: jobs.length })}
+        description={t(BackgroundJobsKeys.Recurring.Description, { count: String(jobs.length) })}
         data={jobs}
         emptyTitle={t(BackgroundJobsKeys.Recurring.EmptyTitle)}
         emptyDescription={t(BackgroundJobsKeys.Recurring.EmptyDescription)}
diff --git a/modules/Email/src/SimpleModule.Email/Pages/Dashboard.tsx b/modules/Email/src/SimpleModule.Email/Pages/Dashboard.tsx
index 8ebe8130..a71ec210 100644
--- a/modules/Email/src/SimpleModule.Email/Pages/Dashboard.tsx
+++ b/modules/Email/src/SimpleModule.Email/Pages/Dashboard.tsx
@@ -25,10 +25,10 @@ interface Props {
   stats: EmailStats;
 }
 
-function failureRateVariant(rate: number): 'default' | 'secondary' | 'destructive' {
+function failureRateVariant(rate: number): 'default' | 'warning' | 'danger' {
   if (rate < 5) return 'default';
-  if (rate <= 15) return 'secondary';
-  return 'destructive';
+  if (rate <= 15) return 'warning';
+  return 'danger';
 }
 
 export default function Dashboard({ stats }: Props) {
diff --git a/modules/Email/src/SimpleModule.Email/Pages/History.tsx b/modules/Email/src/SimpleModule.Email/Pages/History.tsx
index 8c902399..f0811b36 100644
--- a/modules/Email/src/SimpleModule.Email/Pages/History.tsx
+++ b/modules/Email/src/SimpleModule.Email/Pages/History.tsx
@@ -25,17 +25,17 @@ import type { EmailMessage } from '../types';
 
 type EmailStatus = 'Queued' | 'Sending' | 'Sent' | 'Failed' | 'Retrying';
 
-function statusVariant(status: EmailStatus): 'default' | 'secondary' | 'destructive' | 'outline' {
+function statusVariant(status: EmailStatus): 'default' | 'success' | 'danger' | 'warning' | 'info' {
   switch (status) {
     case 'Sent':
-      return 'default';
+      return 'success';
     case 'Failed':
-      return 'destructive';
+      return 'danger';
     case 'Sending':
     case 'Retrying':
-      return 'secondary';
+      return 'warning';
     default:
-      return 'outline';
+      return 'default';
   }
 }
 
diff --git a/modules/PageBuilder/src/SimpleModule.PageBuilder/tsconfig.json b/modules/PageBuilder/src/SimpleModule.PageBuilder/tsconfig.json
index 3e759d10..e47a52cc 100644
--- a/modules/PageBuilder/src/SimpleModule.PageBuilder/tsconfig.json
+++ b/modules/PageBuilder/src/SimpleModule.PageBuilder/tsconfig.json
@@ -4,5 +4,6 @@
     "paths": {
       "@/*": ["./*"]
     }
-  }
+  },
+  "include": ["**/*", "../../../../global.d.ts"]
 }
diff --git a/modules/Products/src/SimpleModule.Products/Pages/Manage.tsx b/modules/Products/src/SimpleModule.Products/Pages/Manage.tsx
index d8fa81e2..8130650f 100644
--- a/modules/Products/src/SimpleModule.Products/Pages/Manage.tsx
+++ b/modules/Products/src/SimpleModule.Products/Pages/Manage.tsx
@@ -99,7 +99,7 @@ export default function Manage({ products }: Props) {
           <DialogHeader>
             <DialogTitle>{t(ProductsKeys.Manage.DeleteDialog.Title)}</DialogTitle>
             <DialogDescription>
-              {t(ProductsKeys.Manage.DeleteDialog.Confirm, { name: deleteTarget?.name })}
+              {t(ProductsKeys.Manage.DeleteDialog.Confirm, { name: deleteTarget?.name ?? '' })}
             </DialogDescription>
           </DialogHeader>
           <DialogFooter>
diff --git a/modules/RateLimiting/src/SimpleModule.RateLimiting/Pages/Admin.tsx b/modules/RateLimiting/src/SimpleModule.RateLimiting/Pages/Admin.tsx
index c8b5d5fa..bcb37494 100644
--- a/modules/RateLimiting/src/SimpleModule.RateLimiting/Pages/Admin.tsx
+++ b/modules/RateLimiting/src/SimpleModule.RateLimiting/Pages/Admin.tsx
@@ -73,12 +73,12 @@ const API_BASE = '/api/rate-limiting';
 
 function PolicyTypeBadge({ type }: { type: string }) {
   const variant =
-    type === 'TokenBucket' ? 'secondary' : type === 'SlidingWindow' ? 'outline' : 'default';
+    type === 'TokenBucket' ? 'info' : type === 'SlidingWindow' ? 'warning' : 'default';
   return <Badge variant={variant}>{type}</Badge>;
 }
 
 function TargetBadge({ target }: { target: string }) {
-  return <Badge variant="outline">{target}</Badge>;
+  return <Badge variant="info">{target}</Badge>;
 }
 
 export default function Admin({ rules, activePolicies }: AdminProps) {
diff --git a/modules/Settings/src/SimpleModule.Settings/Pages/MenuManager.tsx b/modules/Settings/src/SimpleModule.Settings/Pages/MenuManager.tsx
index 42e155de..f34fe1b1 100644
--- a/modules/Settings/src/SimpleModule.Settings/Pages/MenuManager.tsx
+++ b/modules/Settings/src/SimpleModule.Settings/Pages/MenuManager.tsx
@@ -167,7 +167,9 @@ export default function MenuManager({ menuItems: initial, availablePages }: Menu
                   {t(SettingsKeys.MenuManager.CardTreeTitle)}
                 </CardTitle>
                 {totalItems > 0 && (
-                  <Badge>{t(SettingsKeys.MenuManager.ItemsCount, { count: totalItems })}</Badge>
+                  <Badge>
+                    {t(SettingsKeys.MenuManager.ItemsCount, { count: String(totalItems) })}
+                  </Badge>
                 )}
               </div>
               <div className="flex gap-1.5">
diff --git a/modules/Tenants/src/SimpleModule.Tenants/Pages/Browse.tsx b/modules/Tenants/src/SimpleModule.Tenants/Pages/Browse.tsx
index 684d66d5..69baf0e9 100644
--- a/modules/Tenants/src/SimpleModule.Tenants/Pages/Browse.tsx
+++ b/modules/Tenants/src/SimpleModule.Tenants/Pages/Browse.tsx
@@ -31,7 +31,7 @@ export default function Browse({ tenants }: { tenants: BrowseTenant[] }) {
                     tenant.hostCount !== 1
                       ? TenantsKeys.Browse.HostCount_other
                       : TenantsKeys.Browse.HostCount_one,
-                    { count: tenant.hostCount },
+                    { count: String(tenant.hostCount) },
                   )}
                 </span>
                 <span className={`text-sm font-medium ${statusColors[tenant.status]}`}>
diff --git a/modules/Tenants/src/SimpleModule.Tenants/Pages/Manage.tsx b/modules/Tenants/src/SimpleModule.Tenants/Pages/Manage.tsx
index 0a50e93c..9568f418 100644
--- a/modules/Tenants/src/SimpleModule.Tenants/Pages/Manage.tsx
+++ b/modules/Tenants/src/SimpleModule.Tenants/Pages/Manage.tsx
@@ -35,7 +35,7 @@ export default function Manage({ tenants }: { tenants: Tenant[] }) {
     <>
       <DataGridPage
         title={t(TenantsKeys.Manage.Title)}
-        description={t(TenantsKeys.Manage.Description, { count: tenants.length })}
+        description={t(TenantsKeys.Manage.Description, { count: String(tenants.length) })}
         actions={
           <Button onClick={() => router.get('/tenants/create')}>
             {t(TenantsKeys.Manage.CreateButton)}
@@ -108,7 +108,7 @@ export default function Manage({ tenants }: { tenants: Tenant[] }) {
           <DialogHeader>
             <DialogTitle>{t(TenantsKeys.Manage.DeleteDialog.Title)}</DialogTitle>
             <DialogDescription>
-              {t(TenantsKeys.Manage.DeleteDialog.Confirm, { name: deleteTarget?.name })}
+              {t(TenantsKeys.Manage.DeleteDialog.Confirm, { name: deleteTarget?.name ?? '' })}
             </DialogDescription>
           </DialogHeader>
           <DialogFooter>
diff --git a/modules/Users/src/SimpleModule.Users/Pages/Account/Manage/DeletePersonalData.tsx b/modules/Users/src/SimpleModule.Users/Pages/Account/Manage/DeletePersonalData.tsx
index 08fecac4..69f7440d 100644
--- a/modules/Users/src/SimpleModule.Users/Pages/Account/Manage/DeletePersonalData.tsx
+++ b/modules/Users/src/SimpleModule.Users/Pages/Account/Manage/DeletePersonalData.tsx
@@ -57,7 +57,7 @@ export default function DeletePersonalData({ requirePassword, errors }: Props) {
                   />
                 </Field>
               )}
-              <Button type="submit" variant="destructive" className="w-full">
+              <Button type="submit" variant="danger" className="w-full">
                 Delete data and close my account
               </Button>
             </FieldGroup>
diff --git a/package.json b/package.json
index 4166cb6a..eb0a4ed5 100644
--- a/package.json
+++ b/package.json
@@ -18,7 +18,8 @@
     "dev": "node tools/dev-orchestrator.mjs",
     "lint": "biome lint .",
     "format": "biome format --write .",
-    "check": "biome check . && npm run validate-pages && npm run validate:i18n",
+    "check": "biome check . && npm run validate-pages && npm run validate:i18n && npm run typecheck",
+    "typecheck": "node tools/typecheck.mjs",
     "check:fix": "biome check --write . && npm run validate-pages",
     "validate-pages": "node template/SimpleModule.Host/ClientApp/validate-pages.mjs",
     "generate:types": "dotnet build template/SimpleModule.Host && node tools/extract-ts-types.mjs template/SimpleModule.Host/obj/Debug/net10.0/generated/SimpleModule.Generator/SimpleModule.Generator.ModuleDiscovererGenerator modules",
diff --git a/packages/SimpleModule.UI/components/layouts/app-layout.tsx b/packages/SimpleModule.UI/components/layouts/app-layout.tsx
index 7176bd52..cbfb8a8a 100644
--- a/packages/SimpleModule.UI/components/layouts/app-layout.tsx
+++ b/packages/SimpleModule.UI/components/layouts/app-layout.tsx
@@ -175,7 +175,7 @@ function AdminGroup({
 }
 
 export function AppLayout({ children }: { children: React.ReactNode }) {
-  const { props } = usePage<SharedProps>();
+  const { props } = usePage<SharedProps & Record<string, unknown>>();
   const { auth, menus, csrfToken } = props;
   const pathname = typeof window !== 'undefined' ? window.location.pathname : '/';
 
diff --git a/packages/SimpleModule.UI/components/layouts/layout-provider.tsx b/packages/SimpleModule.UI/components/layouts/layout-provider.tsx
index dc9a15e4..5def956a 100644
--- a/packages/SimpleModule.UI/components/layouts/layout-provider.tsx
+++ b/packages/SimpleModule.UI/components/layouts/layout-provider.tsx
@@ -6,7 +6,7 @@ import { PublicLayout } from './public-layout';
 import type { SharedProps } from './types';
 
 function AutoLayout({ children }: { children: React.ReactNode }) {
-  const { props } = usePage<SharedProps>();
+  const { props } = usePage<SharedProps & Record<string, unknown>>();
   const { auth } = props;
 
   if (auth?.isAuthenticated) {
diff --git a/packages/SimpleModule.UI/components/layouts/public-layout.tsx b/packages/SimpleModule.UI/components/layouts/public-layout.tsx
index 2ae524a6..b2bbd5a5 100644
--- a/packages/SimpleModule.UI/components/layouts/public-layout.tsx
+++ b/packages/SimpleModule.UI/components/layouts/public-layout.tsx
@@ -287,7 +287,7 @@ function MobileOverlay({
 }
 
 export function PublicLayout({ children }: { children: React.ReactNode }) {
-  const { props } = usePage<SharedProps>();
+  const { props } = usePage<SharedProps & Record<string, unknown>>();
   const { publicMenu = [] } = props;
   const [mobileOpen, setMobileOpen] = React.useState(false);
   const closeMobile = React.useCallback(() => setMobileOpen(false), []);
diff --git a/tools/typecheck.mjs b/tools/typecheck.mjs
new file mode 100644
index 00000000..214766bc
--- /dev/null
+++ b/tools/typecheck.mjs
@@ -0,0 +1,100 @@
+#!/usr/bin/env node
+
+/**
+ * typecheck.mjs
+ *
+ * Runs `tsc --noEmit` in every module and package that has a tsconfig.json.
+ * Each project is checked independently so @/* path aliases resolve correctly.
+ * All checks run in parallel for speed.
+ *
+ * Exit codes:
+ *   0 = All projects pass type checking
+ *   1 = Type errors found
+ */
+
+import { spawn } from 'node:child_process';
+import { createRequire } from 'node:module';
+import fs from 'node:fs';
+import path from 'node:path';
+
+const projectRoot = path.resolve(import.meta.dirname, '..');
+const modulesDir = path.join(projectRoot, 'modules');
+const packagesDir = path.join(projectRoot, 'packages');
+
+const require = createRequire(import.meta.url);
+const tscBin = require.resolve('typescript/bin/tsc');
+
+function findProjects(baseDir, layout) {
+  const dirs = [];
+  if (!fs.existsSync(baseDir)) return dirs;
+
+  for (const entry of fs.readdirSync(baseDir)) {
+    const full = path.join(baseDir, entry);
+    if (!fs.statSync(full).isDirectory()) continue;
+
+    if (layout === 'flat') {
+      // packages/Foo — check directly
+      if (fs.existsSync(path.join(full, 'tsconfig.json'))) {
+        dirs.push(full);
+      }
+    } else {
+      // modules/Foo/src/Bar — recurse into src/*
+      const srcDir = path.join(full, 'src');
+      if (!fs.existsSync(srcDir)) continue;
+      for (const sub of fs.readdirSync(srcDir)) {
+        const subFull = path.join(srcDir, sub);
+        if (
+          fs.statSync(subFull).isDirectory() &&
+          fs.existsSync(path.join(subFull, 'tsconfig.json'))
+        ) {
+          dirs.push(subFull);
+        }
+      }
+    }
+  }
+  return dirs;
+}
+
+function checkProject(dir) {
+  return new Promise((resolve) => {
+    const proc = spawn(process.execPath, [tscBin, '--noEmit'], {
+      cwd: dir,
+      stdio: 'pipe',
+    });
+    let output = '';
+    proc.stdout.on('data', (d) => (output += d));
+    proc.stderr.on('data', (d) => (output += d));
+    proc.on('close', (code) => resolve({ dir, code, output }));
+  });
+}
+
+const projects = [
+  ...findProjects(modulesDir, 'nested'),
+  ...findProjects(packagesDir, 'flat'),
+];
+
+const results = await Promise.all(projects.map(checkProject));
+
+const failures = [];
+for (const { dir, code, output } of results) {
+  const label = path.relative(projectRoot, dir);
+  if (code === 0) {
+    console.log(`  \u2713 ${label}`);
+  } else {
+    failures.push({ label, output });
+    console.log(`  \u2717 ${label}`);
+  }
+}
+
+if (failures.length > 0) {
+  console.log('\n--- Type errors ---\n');
+  for (const { label, output } of failures) {
+    console.log(`${label}:`);
+    console.log(output);
+  }
+}
+
+console.log(
+  `\nTypecheck: ${projects.length - failures.length}/${projects.length} passed`,
+);
+process.exit(failures.length > 0 ? 1 : 0);