feat: structured address fields, city filter, client Mini App fixes

Onboarding flow для мастеров в MAX Mini App

fix: convert backend from submodule to regular folder

fix: add debug panel to useMaxApp, show initDataUnsafe with ?debug=1 or startapp=debug

fix: unique localStorage keys per app, prevent initData cross-contamination

fix: swap vite base paths — master=/ client=/master/

fix: invalid typeof import syntax in client/index.html

chore: update backend submodule ref

cleanup: remove unused SQLite db files

chore: update backend submodule ref

cleanup: remove duplicate backend files, keep only frontend + submodule

chore: обновлён backend submodule до рефакторинга контроллеров

cleanup: remove unused SQLite db file

chore: add App to gitignore, remove old build artifacts

cleanup: remove frontend/ from backend submodule (moved to parent repo)

cleanup: remove unused SQLite db files

chore: update backend submodule ref

cleanup: remove duplicate backend files, keep only frontend + submodule

chore: обновлён backend submodule до рефакторинга контроллеров

chore: add App to gitignore, remove old build artifacts

cleanup: remove frontend/ from backend submodule (moved to parent repo)

chore: add db/ to gitignore

cleanup: remove duplicate backend files, keep only frontend + submodule

chore: обновлён backend submodule до рефакторинга контроллеров

cleanup: remove frontend/ from backend submodule (moved to parent repo)

chore: обновлён backend submodule до рефакторинга контроллеров

feat: split frontend into master (public catalog) and client (cabinet)

feat: split frontend into master (public catalog) and client (cabinet)

feat: install skill (setup.sh + SKILL.md)

docs: README with setup, usage, features