Complete Themis Course Overview & Export

[JasonWarrenUK]

Overview

Implements the final step of the Themis MVP workflow: a comprehensive course overview and export interface. Users can now review their generated multi-module courses with expandable previews and export to Markdown or HTML format. Also includes complete colour palette definitions for all five modules.

Tip

No additional setup required - the CourseOverview component integrates automatically into the existing Themis workflow at Step 6.

Changes

Course Review Interface

Adds comprehensive review and export functionality as the final step of Themis workflow:

• CourseOverview component: Display course metadata, arc narratives, and module statistics
• Arc-grouped sections: Collapsible arc sections with module cards
• Expandable module previews: Toggle between summary and detailed content view with nested sections for objectives, research, projects, twists, and skills
• XML preview modal: Raw XML viewer for debugging and verification
• Export integration: Markdown and HTML export via Theia service
• Completion banner: Success state with workflow reset option
• Navigation: Links back to previous steps and home

Design System

Complete colour palette definitions for all five modules following complementary colour theory:

• Rhea: Teal ↔ Gold (reference pattern)
• Themis: Amethyst ↔ Gold
• Tethys: Coral ↔ Sage/Emerald
• Metis: Cyan ↔ Coral/Terracotta
• Theia: Rose ↔ Turquoise

Each palette includes:

• Named dark/line colours
• Complete background primary/alternate (main/subtle/nav)
• Complete foreground primary/alternate (dark/midi/lite)
• Available in both TypeScript and JSON formats

Documentation

• Archive outdated XML outputs, add full course generation example
• Update Themis MVP status (milestones 2.7-2.10 complete)
• Add Theia roadmap tasks
• Document new CourseOverview optimization task

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Summary

This PR is like finally getting the keys to your new house after months of construction. You've watched the foundation get laid (config), the walls go up (arc planning), the rooms take shape (module planning), the structure inspected (review), the interior decorated (generation), and now you're walking through the finished home with a comprehensive tour guide who can show you every detail in every room, plus hand you perfectly formatted blueprints to share with others. Oh, and we also finished painting the exterior with a proper colour scheme that doesn't accidentally make two sides of the house look identical.

[claude]

Summary

This PR successfully completes the Themis MVP by adding a comprehensive course overview and export interface (Step 6). The implementation is well-structured with a 1,461-line Svelte component. Code quality is generally good with proper state management. However, there are areas for improvement including accessibility enhancements, error handling robustness, and test coverage.

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🎯 Code Quality & Best Practices

Strengths:

• Well-organized component with clear separation of concerns
• Good use of reactive declarations for computed values (lines 21-32)
• Proper event dispatching pattern
• Comprehensive CSS with responsive design
• Defensive XML parsing with null checks

Areas for Improvement:

1. Accessibility: Modal needs focus trap, escape key handler, and proper ARIA attributes. Buttons lack aria-expanded attributes. Using invalid h7 tag (line 1203).
2. Component Size: At 1,461 lines, consider splitting into ModuleCard, ArcSection, CourseMetadata, and CourseStatistics components.
3. Type Safety: parseModuleXML can return null but isn't always checked before access.

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🐛 Potential Issues

Critical:

1. Memory Leak Risk (lines 17, 42-61): expandedSections grows unbounded. Clear sections for collapsed modules.
2. Race Condition (line 150): resetCourseWorkflow() may be async, causing dispatch to fire early.

Moderate:
3. Browser Compatibility: DOMParser used without availability check.
4. Error Handling: Parser errors only logged to console, not shown to users.
5. Null Reference Risk (lines 596-599): find() could return undefined.
6. Date Parsing (lines 156-164): No validation for invalid date strings.

Minor:
7. Pluralization logic repeated multiple times - extract to utility.
8. Hardcoded strings should be extracted for i18n.
9. Console.error in production code.

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⚡ Performance Considerations

Critical Performance Issue:

• XML Parsing on Every Render (line 328): XML is re-parsed on every component re-render. Solution: Memoize parsed results using Map/cache.

Other Issues:

• Multiple Array.from(querySelectorAll) in nested loops
• Reactive recalculations on every courseData change
• Deep template nesting creates many DOM nodes
• Modal includes full XML in DOM even when closed

Recommendations:

• HIGH: Memoize XML parsing, lazy load modal content
• MEDIUM: Virtual scrolling for 10+ modules, debounce expand/collapse
• LOW: Extract CSS to shared stylesheet, code-split component

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🔒 Security Concerns

1. XML Injection (LOW RISK): Add schema validation before parsing using moduleValidator.ts
2. XSS (LOW RISK): Svelte auto-escapes, but verify Theia export sanitizes output
3. Client Storage: Document what's stored in localStorage
4. Confirmation Dialog: Replace native confirm() with custom modal

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✅ Test Coverage

Current State: 0 test files

Critical Gaps:

• No tests for parseModuleXML(), malformed XML, error states
• No tests for toggle functions, state management, reactivity
• No tests for statistics calculations
• No tests for workflow integration, navigation, reset
• No tests for modal behavior, event dispatching
• No accessibility tests

Priority:

• P0: XML parsing, state management, statistics, export button disabled state
• P1: Modal interactions, navigation events, workflow integration
• P2: Accessibility, responsive design

Target Coverage: 85% for this critical component

Tools: Vitest + @testing-library/svelte, Playwright, axe-core

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Additional Notes

✅ Palette definitions well-structured and complete
✅ Good practice archiving old outputs
✅ Milestones 2.7-2.10 marked complete
⚠️ Consider JSDoc comments for palettes
⚠️ Add CourseOverview link to documentation

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Overall Assessment

This is a solid implementation that completes the Themis MVP. Main concerns: lack of tests, accessibility gaps, and XML parsing performance. These should be addressed before production-ready status, but don't block the MVP milestone.

Recommendation: ✅ Approve with recommendations - Address critical issues (memoization, accessibility, tests) in follow-up PRs.