Enhance role-check system with stricter checks (#15392)

## Overview

This PR strengthens our permission system by introducing more granular
role-based access control across the platform.

## Changes

### New Permissions Added
- **Applications** - Control who can install and manage applications
- **Layouts** - Control who can customize page layouts and UI structure
- **AI** - Control access to AI features and agents
- **Upload File** - Separate permission for file uploads
- **Download File** - Separate permission for file downloads (frontend
visibility)

### Security Enhancements
- Implemented whitelist-based validation for workspace field updates
- Added explicit permission guards to core entity resolvers
- Enhanced ESLint rule to enforce permission checks on all mutations
- Created `CustomPermissionGuard` and `NoPermissionGuard` for better
code documentation

### Affected Components
- Core entity resolvers: webhooks, files, domains, applications,
layouts, postgres credentials
- Workspace update mutations now use whitelist validation
- Settings UI updated with new permission controls

### Developer Experience
- ESLint now catches missing permission guards during development
- Explicit guard markers make permission requirements clear in code
review
- Comprehensive test coverage for new permission logic

## Testing
- ✅ All TypeScript type checks pass
- ✅ ESLint validation passes
- ✅ New permission guards properly enforced
- ✅ Frontend UI displays new permissions correctly

## Migration Notes
Existing workspaces will need to assign the new permissions to roles as
needed. By default, all new permissions are set to `false` for non-admin
roles.

packages/twenty-server/src/engine/core-modules/application/application.module.ts

@@ -13,6 +13,7 @@ import { DataSourceModule } from 'src/engine/metadata-modules/data-source/data-s
 import { DatabaseEventTriggerModule } from 'src/engine/metadata-modules/database-event-trigger/database-event-trigger.module';
 import { WorkspaceManyOrAllFlatEntityMapsCacheModule } from 'src/engine/metadata-modules/flat-entity/services/workspace-many-or-all-flat-entity-maps-cache.module';
 import { ObjectMetadataModule } from 'src/engine/metadata-modules/object-metadata/object-metadata.module';
+import { PermissionsModule } from 'src/engine/metadata-modules/permissions/permissions.module';
 import { RouteTriggerModule } from 'src/engine/metadata-modules/route-trigger/route-trigger.module';
 import { ServerlessFunctionLayerModule } from 'src/engine/metadata-modules/serverless-function-layer/serverless-function-layer.module';
 import { ServerlessFunctionModule } from 'src/engine/metadata-modules/serverless-function/serverless-function.module';
@@ -33,6 +34,7 @@ import { FieldMetadataModule } from 'src/engine/metadata-modules/field-metadata/
     CronTriggerModule,
     RouteTriggerModule,
     WorkspaceMigrationV2Module,
+    PermissionsModule,
   ],
   providers: [ApplicationResolver, ApplicationService, ApplicationSyncService],
 })

packages/twenty-server/src/engine/core-modules/application/application.resolver.ts

@@ -12,9 +12,14 @@ import { FeatureFlagKey } from 'src/engine/core-modules/feature-flag/enums/featu
 import { WorkspaceEntity } from 'src/engine/core-modules/workspace/workspace.entity';
 import { AuthWorkspace } from 'src/engine/decorators/auth/auth-workspace.decorator';
 import { RequireFeatureFlag } from 'src/engine/guards/feature-flag.guard';
+import { SettingsPermissionsGuard } from 'src/engine/guards/settings-permissions.guard';
 import { WorkspaceAuthGuard } from 'src/engine/guards/workspace-auth.guard';
+import { PermissionFlagType } from 'src/engine/metadata-modules/permissions/constants/permission-flag-type.constants';
 
-@UseGuards(WorkspaceAuthGuard)
+@UseGuards(
+  WorkspaceAuthGuard,
+  SettingsPermissionsGuard(PermissionFlagType.APPLICATIONS),
+)
 @Resolver()
 @UseFilters(ApplicationExceptionFilter)
 export class ApplicationResolver {