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/applicationVariable/application-variable.module.ts

@@ -5,9 +5,13 @@ import { NestjsQueryTypeOrmModule } from '@ptc-org/nestjs-query-typeorm';
 import { ApplicationVariableEntity } from 'src/engine/core-modules/applicationVariable/application-variable.entity';
 import { ApplicationVariableEntityService } from 'src/engine/core-modules/applicationVariable/application-variable.service';
 import { ApplicationVariableEntityResolver } from 'src/engine/core-modules/applicationVariable/application-variable.resolver';
+import { PermissionsModule } from 'src/engine/metadata-modules/permissions/permissions.module';
 
 @Module({
-  imports: [NestjsQueryTypeOrmModule.forFeature([ApplicationVariableEntity])],
+  imports: [
+    NestjsQueryTypeOrmModule.forFeature([ApplicationVariableEntity]),
+    PermissionsModule,
+  ],
   providers: [
     ApplicationVariableEntityService,
     ApplicationVariableEntityResolver,

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

@@ -1,12 +1,17 @@
 import { UseFilters, UseGuards } from '@nestjs/common';
 import { Args, Mutation, Resolver } from '@nestjs/graphql';
 
-import { WorkspaceAuthGuard } from 'src/engine/guards/workspace-auth.guard';
+import { ApplicationVariableEntityExceptionFilter } from 'src/engine/core-modules/applicationVariable/application-variable-exception-filter';
 import { ApplicationVariableEntityService } from 'src/engine/core-modules/applicationVariable/application-variable.service';
 import { UpdateApplicationVariableEntityInput } from 'src/engine/core-modules/applicationVariable/dtos/update-application-variable.input';
-import { ApplicationVariableEntityExceptionFilter } from 'src/engine/core-modules/applicationVariable/application-variable-exception-filter';
+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(ApplicationVariableEntityExceptionFilter)
 export class ApplicationVariableEntityResolver {