implement

Prompt file imported from NaseebGrewal/portfolio-ecosystem (.github/prompts/implement.prompt.md). Copyright stays with the author.

Implement the requested feature or fix with zero defects following the strict mandatory lifecycle:

1. FIRST present a bullet-point action plan and ask: "Do you approve of this plan?" with options: [Yes, approve and proceed] and [Custom input from user]. Wait for approval before editing files.
2. Break down steps into manage_todo_list (mark 1 in-progress at a time).
3. Implement clean, typed code adhering to repository conventions.
4. Run tests exclusively inside Docker containers via docker compose up -d and containerized pytest / vitest suites (./scripts/docker-test-all.sh).
5. Perform visual and functional inspection using local browser tools (http://localhost:3000).
6. Present a bulleted summary and prompt for user approval with explicit options: [Yes, approve and finalize] or [Custom input from user].