Improved campaigns onboarding flow

[jeroenrinzema]

This PR includes overhauls the campaigns flow improving the flow and layouts.

[Copilot]

Pull request overview

This PR overhauls the campaigns onboarding flow, simplifying campaign creation and improving the user interface. The changes remove the in-app messaging channel, streamline campaign setup, and introduce a new template workflow with improved layouts.

Key Changes:

• Removed in-app messaging channel support across the platform
• Simplified campaign creation flow (no longer requires subscription)
• Introduced new template-based workflow with step-by-step navigation
• Migrated from legacy UI patterns to modern component library

Reviewed changes

Copilot reviewed 144 out of 148 changed files in this pull request and generated 7 comments.

Show a summary per file

File	Description
services/platform/src/subscriptions/SubscriptionController.ts	Added legacy typography classes; removed in_app from channel enum
services/platform/src/render/TemplateService.ts	Removed in-app template support and related imports
services/platform/src/render/TemplateController.ts	Removed in-app template schema and required field constraints
services/platform/src/render/Template.ts	Removed InAppTemplate class and name field from templates
services/platform/src/providers/inapp/*	Deleted entire in-app provider implementation
services/platform/src/providers/ProviderRepository.ts	Added getDefaultProvider function
services/platform/src/campaigns/CampaignService.ts	Simplified campaign creation; removed subscription requirement
services/platform/src/campaigns/CampaignController.ts	Updated campaign schema to require name and channel instead of subscription
services/platform/src/projects/ProjectService.ts	Changed locale search field from 'name' to 'label'
services/console/src/views/router.tsx	Restructured campaign routes with new template workflow
services/console/src/views/campaign/template/*	New template workflow components and channel-specific setup forms
services/console/src/views/campaign/setup/Setup.tsx	New campaign setup component
services/console/src/views/campaign/CreateCampaign.tsx	New campaign creation modal with channel selection

Files not reviewed (1)

• pnpm-lock.yaml: Language not supported

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