Squash everything befor release.

Some past commits might have contained Cursor's IP or accidentally
commited API keys. Before making the repository public, all the history
has been squashed into a single commit with.

.cursor/rules/lint-after-edit.mdc

@@ -0,0 +1,20 @@
+---
+description:
+globs:
+alwaysApply: true
+---
+# Lint and Format After Edits
+
+After finishing any big code changes, and before yielding to the user, run with your terminal tool the following comand:
+
+```
+source .venv/bin/activate && flask lint
+```
+
+This command will:
+- Run **black** to automatically format the codebase.
+- Run **flake8** to flag any remaining formatting or lint issues.
+
+You don't need to preface it with /bin/bash -c, nor add | cat at the end. Just run it as is.
+
+This ensures the codebase remains clean, consistent, and compliant with style guidelines after every edit.