Citation tracer

(Tier 3 tool — placeholder. Requires per-source entry-index data not yet exported.)

The plan: click an <ls> source (e.g. RV., MBh., L.), see all MW entries citing it. Filter by article type. Cross-reference to the actual textual passages where possible.

Data prerequisite: export data/source-to-entries.json — keyed by source label, valued as list of <L> record numbers. Currently not generated; would require a separate Python pass over mw.txt.

Trust Block

Evidence: no generated atlas data yet; current links point to static MWS reference notes.
Limitations: placeholder only. It does not expose source-to-entry lookup and does not support passage cross-reference.
Validation: checked by npm run build; data export remains future work.
Owner repo: csl-atlas.
Next use: follow citation rows back to dictionary source records before interpreting a source abbreviation.