fix(i18n): Wrapped default Chat Error message in t() to support translation

[sh011]

SUMMARY

This PR wraps the hardcoded DEFAULT_CHART_ERROR string in ChartErrorMessage.tsx with the t() translation function. This ensures that the generic "Data error" fallback message is properly localized when users switch languages in the Superset UI.

BEFORE/AFTER

Before: The fallback string "Data error" was hardcoded and would display in English regardless of the user's selected locale.
After: The string is now properly piped through the translation dictionary and translates correctly based on the active locale.

(Note: Due to local Windows WSL memory constraints which was causing repeated Docker OOM crashes during frontend build, I am unable to attach a localized UI screenshot post fix. There is a screenshot pre-fix which I'll attach here just to ensure that I ran the build locally earlier. I have verified via the test suite below).

TESTING INSTRUCTIONS

1. Verified the React component successfully renders without crashing after applying the t() wrapper.
2. Ran the unit test suite for ChartErrorMessage to verify the translation wrapper integration:

> superset@0.0.0-dev test
> cross-env NODE_ENV=test NODE_OPTIONS="--max-old-space-size=8192" jest --max-workers=80% --silent ChartErrorMessage.test.tsx

PASS src/components/Chart/ChartErrorMessage.test.tsx

Test Suites: 1 passed, 1 total
Tests:       3 passed, 3 total
Snapshots:   0 total
Time:        446.527 s

ADDITIONAL INFORMATION

Has associated issue: #40406
Required feature flags:
Changes UI
Includes DB Migration (follow approval process)
Introduces new feature or API
Removes existing feature or API

[bito-code-review]

Code Review Agent Run #2527fc

Actionable Suggestions - 0

Review Details

• Files reviewed - 1 · Commit Range: d4bb68a..d4bb68a

  • superset-frontend/src/components/Chart/ChartErrorMessage.tsx
• Files skipped - 0
• Tools

  • Whispers (Secret Scanner) - ✔︎ Successful
  • Detect-secrets (Secret Scanner) - ✔︎ Successful

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 64.17%. Comparing base (9441240) to head (d4bb68a).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master   #40504      +/-   ##
==========================================
- Coverage   64.17%   64.17%   -0.01%     
==========================================
  Files        2592     2592              
  Lines      139299   139299              
  Branches    32347    32347              
==========================================
- Hits        89395    89394       -1     
- Misses      48367    48368       +1     
  Partials     1537     1537              

Flag	Coverage Δ
javascript	67.33% <100.00%> (-0.01%)	⬇️

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[hainenber]

Thanks for your contribution @sh011. LGTM!