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.

packages/viz/poc/README.md

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+# Viz FPS Harness
+
+A simple Canvas benchmark to evaluate tile rendering performance (FPS), DPR scaling, and animation cost for GlowTrack.
+
+## Use
+- Open `index.html` in a browser (mobile preferred).
+- Adjust:
+  - Tiles: 30–365
+  - Animate: on/off
+  - Device Pixel Ratio: 1–3
+- Observe FPS and rendering smoothness.
+
+## Goals
+- Validate 60 fps target for typical grids.
+- Identify breakpoints for fallbacks (reduced motion, static render).