fix: simplify i18n extraction pipeline

[brian-smith-tcril]

Summary

• Simplify make extract_translations by removing the separate i18n.concat step
• @openedx/frontend-base (as of alpha.16) now writes flat KV JSON directly to src/i18n/transifex_input.json, so the concat step and its associated transifex-utils dependency are no longer needed
• Bump @openedx/frontend-base peer dep to ^1.0.0-alpha.16 to require the version that includes this change (see openedx/frontend-base#200)

Verified by running make extract_translations on this branch and confirming src/i18n/transifex_input.json is written correctly. Also compared the output against upstream master — our branch produces a strict subset (same keys, same values; 16 keys absent due to source code removed in the frontend-base branch, zero conflicts).

Test plan

• Run make extract_translations and verify src/i18n/transifex_input.json is generated in flat KV format

Log

extract-translations work log

Repo: frontend-app-authn — branch extract-translations (off frontend-base)

Goal: Get make extract_translations working on the frontend-base branch, using the pattern established in openedx/paragon#4177.

Background

Standard MFEs use a two-step pipeline via make extract_translations:

1. i18n.extract — runs fedx-scripts formatjs extract (from frontend-build), outputs an array of {id, defaultMessage, description} objects to ./temp/babel-plugin-formatjs/Default.messages.json
2. i18n.concat — runs transifex-utils.js (from frontend-platform), reads that array and writes flat KV to src/i18n/transifex_input.json

The frontend-base branch doesn't have frontend-platform or frontend-build available, so this pipeline breaks.

Error (current, on frontend-base branch without this fix)

make extract_translations fails at the i18n.concat step:

Error: Found no messages
    at Object.<anonymous> (.../node_modules/@openedx/frontend-base/dist/tools/cli/transifex-utils.js:38:11)

Investigation findings

• i18n_extract in package.json runs openedx formatjs extract (from @openedx/frontend-base CLI)
• That command writes to ./temp/formatjs/Default.messages.json
• The Makefile's i18n.concat step passes ./temp/babel-plugin-formatjs to transifex-utils.js — that directory never gets created, so it throws Found no messages
• Root cause: path mismatch — the Makefile still references the old frontend-build-era path ./temp/babel-plugin-formatjs, but frontend-base's CLI writes to ./temp/formatjs

The fix in openedx/frontend-base#200 sidesteps this entirely — the formatter now outputs flat KV directly to src/i18n/transifex_input.json, removing the need for the concat step altogether.

Verification

• Ran make extract_translations on frontend-base branch (without fix): ❌ Error: Found no messages
• Ran make extract_translations on upstream master: ✅ passes
• Ran make extract_translations on this branch (extract-translations): ✅ passes
• Compared output against upstream master: our branch is a strict subset — same keys, same values, zero conflicts (16 keys absent due to source code removed in the frontend-base branch)

🤖 Generated with Claude Code

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
⚠️ Please upload report for BASE (frontend-base@575892f). Learn more about missing BASE report.

Additional details and impacted files

@@               Coverage Diff                @@
##             frontend-base    #1656   +/-   ##
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  Coverage                 ?   92.12%           
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  Files                    ?       92           
  Lines                    ?     2045           
  Branches                 ?      588           
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  Hits                     ?     1884           
  Misses                   ?      158           
  Partials                 ?        3           

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