feat(i18n): expose the six newly backfilled locales

[rusackas]

SUMMARY

The i18n backfill campaign left every catalog in superset/translations/ with zero untranslated entries, but six of them — Arabic, Catalan, Persian, Finnish, Thai, Turkish — were never added to the LANGUAGES reference dict in config.py, so operators who enable i18n still can't select them. This adds the six entries with their flag codes.

Also completes the frontend Locale type union in @superset-core to the full set of catalog locales: it had drifted to 12 of 29 (missing not just these six but also mi/uk/sk/sl/lv/nl/pl/cs/ro/sr/sr_Latn). Type-level only; no runtime change.

Note LANGUAGES remains {} by default (i18n stays opt-in) — this only extends the reference dict operators copy from.

BEFORE/AFTER SCREENSHOTS OR ANIMATED GIF

N/A — config reference + type union.

TESTING INSTRUCTIONS

Enable the six locales in superset_config.py, switch languages in the UI, observe translated content (catalogs are fully backfilled; AI-generated entries are fuzzy-served pending human review, per the backfill convention).

ADDITIONAL INFORMATION

• Has associated issue:
• Required feature flags:
• Changes UI
• Includes DB Migration
• Introduces new feature or API
• Removes existing feature or API

🤖 Generated with Claude Code

[bito-code-review]

Code Review Agent Run #b888ad

Actionable Suggestions - 0

Additional Suggestions - 1

• superset/config.py - 1

  • Dead code from immediate overwrite · Line 526-531
    Lines 526-531 add 6 new language entries (`ar`, `ca`, `fa`, `fi`, `th`, `tr`) to the `LANGUAGES` dict, but line 535 immediately overwrites it with `LANGUAGES = {}`. These additions are semantically dead code with zero functional impact. While the immediate overwrite is intentional (i18n disabled by default), adding entries that are instantly discarded creates maintenance confusion and contradicts the principle that default config lists should match documented intent.

Review Details

• Files reviewed - 2 · Commit Range: 0fd8795..0fd8795

  • superset-frontend/packages/superset-core/src/translation/types/index.ts
  • superset/config.py
• Files skipped - 0
• Tools

  • MyPy (Static Code Analysis) - ✔︎ Successful
  • Astral Ruff (Static Code Analysis) - ✔︎ Successful
  • Whispers (Secret Scanner) - ✔︎ Successful
  • Detect-secrets (Secret Scanner) - ✔︎ Successful
  • Eslint (Linter) - ✔︎ Successful

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Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 64.21%. Comparing base (847bdad) to head (758f8c4).
⚠️ Report is 3 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master   #41827      +/-   ##
==========================================
- Coverage   64.77%   64.21%   -0.57%     
==========================================
  Files        2689     2689              
  Lines      148945   148945              
  Branches    34369    34369              
==========================================
- Hits        96479    95642     -837     
- Misses      50697    51534     +837     
  Partials     1769     1769              

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postgres	57.92% <ø> (ø)
presto	40.73% <ø> (ø)
python	58.13% <ø> (-1.19%)	⬇️
sqlite	57.50% <ø> (ø)
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