Auto-filled Duties exceeds translator 2,000-char limit, causing a silent 400

[jinu2ID]

Summary

On the Military-to-Civilian Translator, selecting an MOS auto-fills the Key Duties & Responsibilities box with the full official job-code description. For many codes that text is far longer than the translate endpoint allows, so submitting returns a 400 that the UI never surfaces. The user sees the blue "instant dictionary" banner keep spinning and assumes the AI is hanging.

Steps to reproduce

1. Go to /resume-translator.
2. Enter job code 11B, branch Army, rank Sergeant, years of service 7.
3. Leave the auto-filled Duties as-is.
4. Submit.

Result: the AI result never appears; the blue banner spins indefinitely.

Root cause

• The MOS auto-fill populates Duties with the full description. For 11B that is 9,239 characters.
• src/pages/api/military-resume/translate.ts caps duties at 2,000 characters (MAX_FIELD) and returns:
  400 {"error":"Duties and achievements must be under 2,000 characters each."}
• src/hooks/use-translator.ts treats any non-200 as "AI unavailable" and keeps the dictionary result without showing the error, so the spinning banner stays up and reads as a hang.

Impact

Any user who relies on the Duties auto-fill (the default path) and does not manually trim it gets a failed translation with no explanation.

Suggested fixes (pick one or combine)

1. Truncate the auto-filled Duties to a sensible length when populating the form.
2. Raise or remove the 2,000-char server limit for Duties.
3. Surface the 400 validation message in the UI instead of leaving the spinner up.

Related files

• src/pages/api/military-resume/translate.ts (validation limit)
• src/hooks/use-translator.ts (swallows the error)
• src/components/translator/TranslatorForm.tsx (Duties auto-fill)

Discovered while verifying #1011.