Replace main with rebuilt AI-Todo

[yujiezhang-ops]

Summary

• Replace the current main tree with the rebuilt local-first AI-Todo implementation.
• Keep the replacement protected behind a PR instead of force-pushing main.
• Record previous main as 7ce41b7.

CI / Publishing

• Replace the old workflow with .github/workflows/ci.yml.
• CI uses Node 24 and runs npm ci, npm run build, and npm test.
• Remove the old publish workflow so it no longer publishes legacy @agentmemory/* packages.

Public Scope

• Include user-facing README, source, tests, static UI assets, package files, lockfile, AGENTS.md, LICENSE, and CI.
• Exclude internal product/task-chain docs and local-only artifacts such as .codegraph, dist, node_modules, .env, local data, and .local.

Verification

• npm ci
• npm run build
• npm test (74 passing)
• git diff --check
• node dist/cli.js doctor
• node dist/cli.js open --port 0, then GET /, /app.js, and /healthz

Notes

• No direct push to main was performed.
• npm publishing remains intentionally unconfigured pending a separate release strategy for @maimorylab/ai-todo.