hmem-new-rule

Add a new rule and place it correctly — decide between a cross-project R-entry and a project-specific subnode under the active project's Rules section. Use whenever the user says 'neue Regel', 'Regel hinzufügen', 'new rule', 'add a rule', or invokes /hmem-new-rule. Critical safeguard: project-specific rules placed as R-entries pollute the session-start Rules listing across every project — get the scope right BEFORE…