1.1 Initialize TypeScript project with proper tsconfig.json

Configured strict mode, module resolution, and path aliases

1.2 Set up Vite + React frontend structure

Created component architecture with routing

1.3 Set up Express backend with TypeScript

REST API foundation with middleware support

1.4 Configure Prettier, ESLint, and Git hooks

Code quality standards and formatting automation

1.5 Set up Docker containerization

Multi-stage builds for frontend and backend

1.6 Configure GitHub Actions CI/CD pipeline

Automated testing, building, and deployment

1.8 Document development workflow

Contribution guidelines and best practices

2.1 Create Jellyfin API client with authentication

Token-based auth with refresh token handling

2.2 Implement library and media item fetching

Paginated requests with filtering capabilities

2.4 Create poster upload/save back to Jellyfin

Binary upload with progress tracking

2.5 Add error handling and rate limiting

Retry mechanisms and circuit breaker pattern

3.1 Set up TMDb API client

API key management and request throttling

3.2 Implement alternative poster fetching

Multiple image sizes and aspect ratios

3.3 Add metadata enrichment (genres, year, overview)

Structured data parsing and normalization

3.4 Create poster options selection interface

Thumbnail gallery with preview functionality

4.1 Design JSON template schema

Versioned specification with validation rules

4.2 Create predefined card types (poster, banner, anime, comic)

Sample templates for common use cases

4.3 Implement template loader and validator

Schema validation and error reporting

4.4 Add template selection UI component

Gallery view with filtering and search

4.5 Create custom template creation interface

WYSIWYG editor for template design

5.1 Set up HTML5 Canvas with WebGL context

Context initialization and fallback handling

5.2 Implement layered compositing pipeline

Z-index management and blending modes

5.3 Add background image loading and scaling

Aspect ratio preservation and tiling options

5.4 Create mask application system

Shape clipping and alpha channel manipulation

5.5 Implement text layer rendering with font metrics

Kerning, leading, and baseline alignment

5.6 Add effects system (shadow, stroke, glow, blur)

Shader-based effects with parameter controls

5.7 Create real-time preview (<200ms target)

Debounced rendering with progressive enhancement

5.8 Build high-quality export pipeline

PNG/JPEG/WebP export with resolution options

6.1 Integrate fontkit for font loading and metrics

OpenType feature support and glyph extraction

6.2 Create font property controls (size, kerning, interline)

Real-time adjustment with visual feedback

6.3 Implement character replacement system

Ligatures and stylistic alternates support

6.4 Add case transformation features

Title case, sentence case, small caps

6.5 Create font licensing validation

Usage rights checking and attribution display

6.6 Build font upload and management interface

Drag-and-drop upload with preview thumbnails

7.1 Create main editor layout with canvas and controls

Responsive design with docking panels

7.2 Build media selection interface (Jellyfin browser)

Grid/list view with filtering and sorting

7.3 Add template picker component

Categorized templates with live previews

7.4 Create font controls panel

Advanced typography settings with live preview

7.5 Implement real-time preview synchronization

Debounced updates with performance optimization

7.6 Add export options and progress tracking

Batch processing with status indicators

7.7 Ensure WCAG AA accessibility compliance

Keyboard navigation and screen reader support

8.1 Write unit tests for core utilities and rendering

80%+ coverage target for critical modules

8.2 Add component tests for key UI elements

Interaction testing with React Testing Library

8.3 Create integration tests for API endpoints

Contract testing with mock services

8.4 Set up E2E tests with Playwright

Cross-browser testing scenarios

8.5 Add visual regression testing

Screenshot comparison with threshold tolerance

8.6 Implement performance benchmarks

Rendering speed and memory usage metrics