Initial commit: CookIT recipe collection and week planner

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

README.md

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+# CookIt
+
+A personal recipe collection for Android, built with Flutter. Meal planning, Cooking Mode, QR sharing and AI import come later; see [instructions.md](instructions.md).
+
+- Vocabulary: [GLOSSARY.md](GLOSSARY.md)
+- Decisions: [docs/adr/](docs/adr/)
+- Recipe Bundle (import/export) format: [docs/recipe-bundle-format.md](docs/recipe-bundle-format.md)
+- One-time Excel converter: [tools/excel-import/](tools/excel-import/)
+
+## Develop
+
+```sh
+flutter pub get
+dart run build_runner build      # after changing drift tables (lib/src/database)
+flutter gen-l10n                 # after changing lib/src/localization/app_de.arb
+flutter analyze
+flutter test
+flutter run
+```
+
+On Windows, the database tests use the system's `winsqlite3.dll`. Set `COOKIT_SQLITE_DLL` to use a different SQLite library.
+
+`test/bundle/bundle_service_test.dart` also imports the real converted workbook (`tools/excel-import/out/cookit-rezepte.zip`) when it exists.
+
+## Layout
+
+```
+lib/src/
+  app.dart            MaterialApp, routes
+  design/             theme (seed #65A86C, Nunito headings)
+  localization/       app_de.arb + generated code
+  database/           drift tables
+  recipes/            models, repositories, search, edit-form draft, views
+  bundle/             Recipe Bundle import/export
+  settings/           settings and Course list
+```