docs: Update project title and course description

docs: Complete contract directory description in project structure

docs: Update Git commit convention guidelines

feat: Add OpenAPI contract management structure

fix(client): Fix clearCompleted method in WebAPITodosService

chore: Exclude .claude/settings.local.json from version control

fix(client): Fix race condition causing dual login UI display

chore(client): Upgrade Vite from 5.3.4 to 7.1.9

fix(server): Fix build compatibility with Gradle 9.1.0

docs: Add AI workflow guidelines to CLAUDE.md

chore(server): Upgrade Gradle wrapper to 9.1.0

docs: Add CLAUDE.md and Claude Code settings for agentic coding

docs: Update README

refactor(server): Reorganize application architecture and restructure package structure

chore(server): Upgrade Gradle version to 8.12