feat: Add GlowTrack mood and habit wellbeing grid specifications

- Introduced export schema for JSON data structure.
- Created renderer contract detailing canvas/SVG rendering requirements.
- Defined IndexedDB storage schema and migration strategies.
- Documented data model including entities and relationships.
- Developed implementation plan outlining execution flow and project structure.
- Provided quickstart guide for development environment setup.
- Compiled research documentation on performance, accessibility, and theming.
- Established feature specification with user scenarios and functional requirements.

specs/001-glowtrack-a-mood/research/07-tailwind-css-vars.md

@@ -0,0 +1,18 @@
+# Research: Tailwind & CSS Variables Theming
+
+## Hypothesis
+We can keep CSS output small while supporting dynamic theming via CSS variables and Tailwind utilities.
+
+## Questions
+- Mapping CSS variables to Tailwind utilities without bloating CSS
+- Safe patterns for dynamic classes and purge
+- Runtime theme switching performance cost
+
+## Method
+- Prototype theme tokens and a toggle; inspect CSS size
+
+## Acceptance
+- Minimal CSS growth; smooth theme switching
+
+## Deliverables
+- Token design, Tailwind config guidance, sample components