chore: remove IS_APPLICATION_ENABLED feature flag (#19081)

## Summary
- Remove the `IS_APPLICATION_ENABLED` feature flag — application
features are now always enabled
- Remove `@RequireFeatureFlag` decorators and `FeatureFlagGuard` from 7
application resolvers (registration, development, manifest, install,
upgrade, marketplace, oauth)
- Remove frontend feature flag checks: settings navigation visibility,
route protection wrapper, side panel widget type gating, and role
permission flag filtering
- Delete the integration test for disabled-flag behavior
- Clean up seed data, test mocks, and generated schema files

packages/twenty-front/src/modules/app/components/SettingsRoutes.tsx

@@ -689,7 +689,7 @@ export const SettingsRoutes = ({ isAdminPageEnabled }: SettingsRoutesProps) => (
       <Route
         element={
           <SettingsProtectedRouteWrapper
-            requiredFeatureFlag={FeatureFlagKey.IS_APPLICATION_ENABLED}
+            settingsPermission={PermissionFlagType.APPLICATIONS}
           />
         }
       >

packages/twenty-front/src/modules/settings/hooks/useSettingsNavigationItems.tsx

@@ -75,9 +75,6 @@ const useSettingsNavigationItems = (): SettingsNavigationSection[] => {
     (currentUser?.canImpersonate || currentUser?.canAccessFullAdminPanel) ??
     false;
   const isAIEnabled = useIsFeatureEnabled(FeatureFlagKey.IS_AI_ENABLED);
-  const isApplicationEnabled = useIsFeatureEnabled(
-    FeatureFlagKey.IS_APPLICATION_ENABLED,
-  );
   const isSupportChatConfigured =
     supportChat?.supportDriver === 'FRONT' &&
     isNonEmptyString(supportChat.supportFrontChatId);
@@ -178,9 +175,7 @@ const useSettingsNavigationItems = (): SettingsNavigationSection[] => {
           label: t`Apps`,
           path: SettingsPath.Applications,
           Icon: IconPlug,
-          isHidden:
-            !isApplicationEnabled ||
-            !permissionMap[PermissionFlagType.WORKSPACE],
+          isHidden: !permissionMap[PermissionFlagType.APPLICATIONS],
           modifier: 'new',
         },
         {

packages/twenty-front/src/modules/settings/roles/role-permissions/permission-flags/hooks/useSettingsRolePermissionFlagConfig.ts

@@ -34,9 +34,6 @@ export const useSettingsRolePermissionFlagConfig = ({
   assignmentCapabilities,
 }: UseSettingsRolePermissionFlagConfigParams = {}): SettingsRolePermissionsSettingPermission[] => {
   const isAIEnabled = useIsFeatureEnabled(FeatureFlagKey.IS_AI_ENABLED);
-  const isApplicationEnabled = useIsFeatureEnabled(
-    FeatureFlagKey.IS_APPLICATION_ENABLED,
-  );
 
   const {
     canBeAssignedToAgents = false,
@@ -180,13 +177,6 @@ export const useSettingsRolePermissionFlagConfig = ({
       if (permission.key === PermissionFlagType.AI_SETTINGS && !isAIEnabled) {
         return false;
       }
-      if (
-        permission.key === PermissionFlagType.APPLICATIONS &&
-        !isApplicationEnabled
-      ) {
-        return false;
-      }
-
       if (hasAssignmentCapabilities) {
         if (canBeAssignedOnlyToAgents && !permission.isRelevantForAgents) {
           return false;
@@ -209,6 +199,5 @@ export const useSettingsRolePermissionFlagConfig = ({
     canBeAssignedToUsers,
     canBeAssignedToApiKeys,
     isAIEnabled,
-    isApplicationEnabled,
   ]);
 };

packages/twenty-front/src/modules/side-panel/pages/page-layout/components/SidePanelPageLayoutWidgetTypeSelect.tsx

@@ -86,19 +86,13 @@ export const SidePanelPageLayoutWidgetTypeSelect = () => {
   const { removePageLayoutWidgetAndPreservePosition } =
     useRemovePageLayoutWidgetAndPreservePosition(pageLayoutId);
 
-  const isApplicationEnabled = useIsFeatureEnabled(
-    FeatureFlagKey.IS_APPLICATION_ENABLED,
-  );
-
   const isRecordTableWidgetEnabled = useIsFeatureEnabled(
     FeatureFlagKey.IS_RECORD_TABLE_WIDGET_ENABLED,
   );
 
   const { data: frontComponentsData } = useQuery<{
     frontComponents: FrontComponent[];
-  }>(FIND_MANY_FRONT_COMPONENTS, {
-    skip: !isApplicationEnabled,
-  });
+  }>(FIND_MANY_FRONT_COMPONENTS);
 
   const frontComponents = frontComponentsData?.frontComponents ?? [];
 
@@ -288,7 +282,7 @@ export const SidePanelPageLayoutWidgetTypeSelect = () => {
         </SelectableListItem>
       </SidePanelGroup>
 
-      {isApplicationEnabled && frontComponentsWithSelectItemId.length > 0 && (
+      {frontComponentsWithSelectItemId.length > 0 && (
         <SidePanelGroup heading={t`Front Components`}>
           {frontComponentsWithSelectItemId.map(
             ({ frontComponent, selectItemId }) => (