feat: download query results as CSV#420
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Adds a Download CSV action to the frame results toolbar for query frames with response data. Query responses are flattened into rows (dot-notation for nested objects, '; '-joined scalar arrays, JSON-stringified object arrays, __block column for multi-block responses) and serialized as RFC-4180 CSV, downloaded as ratel-results-<YYYY-MM-DD-HHMM>.csv. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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What
Adds a Download CSV action to the frame toolbar (shown only for query frames with response data), exporting the current result as a spreadsheet-ready CSV named
ratel-results-<YYYY-MM-DD-HHMM>.csv.Flattening rules (
lib/csvExport.js)friend.name).;; arrays of objects are JSON-stringified into the cell (no row explosion).__blockcolumn is added only when the response has multiple top-level blocks.Testing
16 unit tests: nesting, array handling, multi-block, header union/order, quoting edge cases, download-link lifecycle (createObjectURL → click → revoke), no-op on empty data.
npm run buildpasses.Complements #411 (graph PNG/JSON export) on the tabular side.
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