Remove weak ?raw contract-test assertions that pin nothing

Delete generic substring pins (toContain('Button') next to
ButtonLink/ActionIconButton siblings, 'import {', 'const {') that can
never fail independently, plus the not.toContain('Pro') booby trap on
DataHandlingPanel that the word Proxmox would spuriously trip. Where
sibling coverage was incomplete, replace with a specific pin instead:
ErrorBoundary 'Button' becomes the shared-Button import line, and the
proxmoxVersion 'unknown' pin becomes the actual sentinel check.

frontend-modern/src/__tests__/App.architecture.test.ts

@@ -36,7 +36,6 @@ describe('App architecture', () => {
     expect(appSource).toContain(
       "import { dialogStackHasBlockingDialog } from './components/shared/useDialogState';",
     );
-    expect(appSource).toContain('import {');
     expect(appSource).toContain("} from '@/utils/appShellScrollRestoration';");
     expect(appSource).toContain('const runtime = useAppRuntimeState();');
     expect(appSource).toContain('pendingAppShellRestoreTop');

frontend-modern/src/components/Settings/__tests__/ProLicensePanel.test.tsx

@@ -1643,7 +1643,6 @@ describe('ProLicensePanel', () => {
     expect(proLicensePlanSectionSource).toContain('currentPlanSummary.privateRuntimeAction');
     expect(proLicensePlanSectionSource).toContain('props.activationSuccessSummary');
     expect(proLicensePlanSectionSource).toContain('summary().actionUrl');
-    expect(proLicensePlanSectionSource).toContain('Button');
     expect(proLicensePlanSectionSource).toContain('ButtonLink');
     expect(proLicensePlanSectionSource).toContain('variant="warning"');
     expect(proLicensePlanSectionSource).toContain('size="settingsActionXs"');

frontend-modern/src/components/Settings/__tests__/settingsArchitecture.test.ts

@@ -106,7 +106,6 @@ describe('settings architecture guardrails', () => {
   it('keeps Settings on the canonical page shell boundary', () => {
     expect(settingsSource).toContain("import { SettingsDialogs } from './SettingsDialogs';");
     expect(settingsSource).toContain("import { SettingsPageShell } from './SettingsPageShell';");
-    expect(settingsSource).toContain('const {');
     expect(settingsSource).toContain('useSettingsNavigation({');
     expect(settingsSource).toContain('<SettingsPageShell');
     expect(settingsSource).toContain('<SettingsDialogs');
@@ -304,7 +303,6 @@ describe('settings architecture guardrails', () => {
     expect(dataHandlingPanelSource).not.toContain('Start Trial');
     expect(dataHandlingPanelSource).not.toContain('higher limits');
     expect(dataHandlingPanelSource).not.toContain('Upgrade');
-    expect(dataHandlingPanelSource).not.toContain('Pro');
     expect(auditWebhookPanelSource).toContain('getAuditWebhookFeatureGateCopy({');
     expect(auditWebhookPanelSource).toContain('paidRuntimeRequired: paidRuntimeRequired()');
     expect(auditWebhookPanelSource).not.toContain('Audit Webhooks (Pro)');

frontend-modern/src/components/__tests__/ErrorBoundary.test.tsx

@@ -93,7 +93,7 @@ describe('ErrorBoundary', () => {
 
   it('keeps fallback chrome on shared primitives', () => {
     expect(errorBoundarySource).toContain('CalloutCard');
-    expect(errorBoundarySource).toContain('Button');
+    expect(errorBoundarySource).toContain("import { Button } from '@/components/shared/Button';");
     expect(errorBoundarySource).toContain('lucide-solid/icons/alert-triangle');
     expect(errorBoundarySource).not.toContain('<svg');
     expect(errorBoundarySource).not.toContain(

frontend-modern/src/components/__tests__/UpdateConfirmationModal.test.tsx

@@ -48,7 +48,6 @@ describe('UpdateConfirmationModal', () => {
 
   it('keeps update confirmation chrome on shared primitives', () => {
     expect(updateConfirmationModalSource).toContain('CalloutCard');
-    expect(updateConfirmationModalSource).toContain('Button');
     expect(updateConfirmationModalSource).toContain('ActionIconButton');
     expect(updateConfirmationModalSource).toContain('lucide-solid/icons/arrow-right');
     expect(updateConfirmationModalSource).not.toContain('<svg');

frontend-modern/src/components/shared/SharedPrimitives.guardrails.test.ts

@@ -1275,7 +1275,7 @@ describe('shared primitive guardrails', () => {
 
     expect(proxmoxVersionSource).toContain('formatProxmoxVersion');
     expect(proxmoxVersionSource).toContain('pve-manager\\/');
-    expect(proxmoxVersionSource).toContain('unknown');
+    expect(proxmoxVersionSource).toContain("version.toLowerCase() === 'unknown'");
   });
 
   it('keeps product table scroll frames on the shared table shell', () => {
@@ -3331,7 +3331,7 @@ describe('shared primitive guardrails', () => {
         }),
       ]),
     );
-    expect(errorBoundarySource).toContain('Button');
+    expect(errorBoundarySource).toContain("import { Button } from '@/components/shared/Button';");
     expect(errorBoundarySource).not.toContain(
       'px-4 py-2 bg-blue-600 text-white rounded hover:bg-blue-700',
     );
@@ -3341,7 +3341,6 @@ describe('shared primitive guardrails', () => {
     expect(errorBoundarySource).not.toContain(
       'text-xs px-2 py-1 bg-red-600 text-white rounded hover:bg-red-700',
     );
-    expect(updateConfirmationModalSource).toContain('Button');
     expect(updateConfirmationModalSource).toContain('ActionIconButton');
     expect(updateConfirmationModalSource).not.toContain(
       'px-4 py-2 text-sm font-medium text-base-content hover:bg-surface-hover rounded-md transition-colors',
@@ -3349,7 +3348,6 @@ describe('shared primitive guardrails', () => {
     expect(updateConfirmationModalSource).not.toContain(
       'px-4 py-2 text-sm font-medium text-white bg-blue-600 hover:bg-blue-700 rounded-md transition-colors',
     );
-    expect(updateProgressModalSource).toContain('Button');
     expect(updateProgressModalSource).toContain('ActionIconButton');
     expect(updateProgressModalSource).not.toContain(
       'mt-2 px-3 py-1.5 text-xs font-medium text-white bg-blue-600 hover:bg-blue-700 rounded',
@@ -4697,7 +4695,7 @@ describe('shared primitive guardrails', () => {
       },
     ]);
     expect(errorBoundarySource).toContain('CalloutCard');
-    expect(errorBoundarySource).toContain('Button');
+    expect(errorBoundarySource).toContain("import { Button } from '@/components/shared/Button';");
     expect(errorBoundarySource).toContain('lucide-solid/icons/alert-triangle');
     expect(errorBoundarySource).not.toContain('<svg');
     expect(errorBoundarySource).not.toContain('bg-red-50 dark:bg-red-900 border border-red-200');
@@ -4749,11 +4747,9 @@ describe('shared primitive guardrails', () => {
     ]);
 
     expect(updateConfirmationModalSource).toContain('CalloutCard');
-    expect(updateConfirmationModalSource).toContain('Button');
     expect(updateConfirmationModalSource).toContain('ActionIconButton');
     expect(updateConfirmationModalSource).toContain('lucide-solid/icons/arrow-right');
     expect(updateProgressModalSource).toContain('CalloutCard');
-    expect(updateProgressModalSource).toContain('Button');
     expect(updateProgressModalSource).toContain('ActionIconButton');
     expect(updateProgressModalSource).toContain('LoadingSpinner');