When the barcode scanner cannot read a code within 5 seconds and Gemini
is available, a camera frame is automatically captured and sent to the
new gemini_barcode_visual endpoint for visual product identification.
The result pre-fills the product form identically to a barcode scan.
- PHP: new geminiBarcodeVisual() function + router case + aiActions entry
- PHP: barcode_ai_fallback setting in getServerSettings() + saveSettings() boolMap
- JS: _aiFallbackTimer (cleared on detection/stop), 5s timer in initScanner()
- JS: _tryGeminiVisualBarcode() — captures JPEG frame, calls API, saves product
- JS: barcode_ai_fallback wired into serverKeys, applyUI, collectUI, POST body
- HTML: AI fallback toggle in Settings → Camera card
- Translations: ai_fallback_* strings in scan + settings.camera (it/en/de/fr/es)
Feature is disabled by default (BARCODE_AI_FALLBACK=false).
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