docs: add auto-claude spec and tracking files

- Add spec.md and requirements.json for task definition
- Add qa_report.md with QA findings
- Add task_logs.json and task_metadata.json for tracking

.auto-claude/specs/001-conceptual-explanations/spec.md

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+# Conceptual Explanations
+
+Add brief 'Why This Works' explanations to each lesson that explain the concept behind the CSS property, not just the syntax. Include visual diagrams where helpful.
+
+## Rationale
+The #1 criticism of Flexbox Froggy and similar tools is they teach syntax without explaining WHY. Codecademy and freeCodeCamp also criticized for 'just type this without understanding'. This is a major market gap we can fill.
+
+## User Stories
+- As a beginner, I want to understand WHY CSS properties work so that I can apply knowledge to new situations
+- As a self-taught developer, I want conceptual understanding so that I can build from scratch, not just follow tutorials
+
+## Acceptance Criteria
+- [ ] Each lesson includes a 'Concept' section explaining WHY the CSS property works
+- [ ] Explanations are concise (2-4 sentences) and beginner-friendly
+- [ ] Visual diagrams or illustrations included where helpful
+- [ ] Concept section is collapsible so advanced users can skip
+- [ ] Flexbox lessons explicitly explain container vs item distinction