Feature/create endpoint to get all platforms (#6096)

Add new endpoint GET api/v1/platforms to retrieve all platforms with
readPlatforms permission. This provides a simpler alternative to the
existing platform endpoint that includes account counts.

- Create PlatformsController with GET endpoint using readPlatforms permission
- Create PlatformsModule importing PlatformModule for service reuse
- Register PlatformsModule in app.module.ts
- Add readPlatforms permission to USER role

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

apps/api/src/app/app.module.ts

@@ -37,6 +37,7 @@ import { AssetsModule } from './endpoints/assets/assets.module';
 import { BenchmarksModule } from './endpoints/benchmarks/benchmarks.module';
 import { GhostfolioModule } from './endpoints/data-providers/ghostfolio/ghostfolio.module';
 import { MarketDataModule } from './endpoints/market-data/market-data.module';
+import { PlatformsModule } from './endpoints/platforms/platforms.module';
 import { PublicModule } from './endpoints/public/public.module';
 import { SitemapModule } from './endpoints/sitemap/sitemap.module';
 import { TagsModule } from './endpoints/tags/tags.module';
@@ -95,6 +96,7 @@ import { UserModule } from './user/user.module';
     MarketDataModule,
     OrderModule,
     PlatformModule,
+    PlatformsModule,
     PortfolioModule,
     PortfolioSnapshotQueueModule,
     PrismaModule,

apps/api/src/app/endpoints/platforms/platforms.controller.ts

@@ -0,0 +1,20 @@
+import { HasPermission } from '@ghostfolio/api/decorators/has-permission.decorator';
+import { HasPermissionGuard } from '@ghostfolio/api/guards/has-permission.guard';
+import { PlatformService } from '@ghostfolio/api/app/platform/platform.service';
+import { permissions } from '@ghostfolio/common/permissions';
+
+import { Controller, Get, UseGuards } from '@nestjs/common';
+import { AuthGuard } from '@nestjs/passport';
+import { Platform } from '@prisma/client';
+
+@Controller('platforms')
+export class PlatformsController {
+  public constructor(private readonly platformService: PlatformService) {}
+
+  @Get()
+  @HasPermission(permissions.readPlatforms)
+  @UseGuards(AuthGuard('jwt'), HasPermissionGuard)
+  public async getPlatforms(): Promise<Platform[]> {
+    return this.platformService.getPlatforms();
+  }
+}

apps/api/src/app/endpoints/platforms/platforms.module.ts

@@ -0,0 +1,11 @@
+import { PlatformModule } from '@ghostfolio/api/app/platform/platform.module';
+
+import { Module } from '@nestjs/common';
+
+import { PlatformsController } from './platforms.controller';
+
+@Module({
+  controllers: [PlatformsController],
+  imports: [PlatformModule]
+})
+export class PlatformsModule {}

libs/common/src/lib/permissions.ts

@@ -136,6 +136,7 @@ export function getPermissions(aRole: Role): string[] {
         permissions.deleteWatchlistItem,
         permissions.readAiPrompt,
         permissions.readMarketDataOfOwnAssetProfile,
+        permissions.readPlatforms,
         permissions.readWatchlist,
         permissions.updateAccount,
         permissions.updateAccess,