[Task]: Add simple HTML Kanban board for issues

[DYAI2025]

Task Description

Create a simple static HTML page that displays a Kanban board of repository issues grouped by status/labels.

Detailed Steps

• Create dashboard/kanban.html (standalone HTML + CSS + vanilla JS)
• Columns: "To Do", "In Progress", "In Review", "Done"
• Map issues to columns by labels:
  • To Do: label ready
  • In Progress: label in-process
  • In Review: label in-review
  • Done: state closed or label done
• Use GitHub REST API (unauthenticated) to fetch open issues for DYAI2025/BeCoin_EcoSim_LLM (fallback: show friendly error if rate-limited)
• Show for each issue: number, title (link), labels (small chips), created date
• Add simple refresh button and auto-refresh every 60s
• Style with minimal CSS (no external frameworks)
• Document usage in README: how to open locally (file://) and via a simple python -m http.server

Acceptance Criteria

• dashboard/kanban.html renders 4 columns with issues grouped by labels/states
• Clicking an item opens the issue on GitHub
• Works without build steps (pure HTML/JS)
• Graceful message when API rate limit is hit
• README updated with a short "Kanban" section

Complexity

simple