[MIG] Forward-port changes from 14.0

[ecino]

No description provided.

[greptile-apps]

Confidence Score: 5/5

The reviewed changes are safe to merge.

No defects remain. The tested empty-content paths safely avoid automatic delivery and route correspondence for translation.

Files Needing Attention: No additional files need attention.

T-Rex Logs

What T-Rex did

• I ran the focused executable harness against the language detector and B2S routing for empty text and separator-only text.
• I verified that the under-50-character guard in advanced_translation/models/langdetect.py short-circuits and returns an empty detector record, so the third-party langdetect call is not reached.
• I confirmed the harness output shows both inputs queue translations, disable auto-send, and produce no exceptions, with a pass for empty and separator-only cases.

_{Ran code and verified through T-Rex}

_{Reviews (1): Last reviewed commit: "[MIG] Forward-port changes from 14.0" | Re-trigger Greptile}