feat: No-Barcode Products & Manual Barcode Input

[AkarinServer]

Features

Manager App

• No-Barcode Product Mode: Added a switch in the 'Add Product' screen.
  • Hides barcode input and scan button.
  • Auto-generates unique IDs (e.g., NB-1, NB-2).
  • Prevents converting existing no-barcode products back to barcode products.

Kiosk App

• No Barcode Item Picker:
  • Dedicated dialog to select no-barcode products (NB-*).
  • Filter by category (Type) and search by name.
• Manual Barcode Input:
  • Replaced system keyboard with a custom Numeric Keypad Dialog.
  • Real-time Search: Typing digits searches local database for matching barcodes or names.
  • Direct add-to-cart from search results.

Technical Details

• Database: Added searchProducts(query) to Kiosk DatabaseHelper (partial matching).
• UI: New ManualBarcodeDialog and NoBarcodeProductsDialog widgets.

[chatgpt-codex-connector]

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[chatgpt-codex-connector]

Preserve generated NB- barcode across retry attempts*

When no-barcode mode is enabled, each call to _saveProduct regenerates a new NB-* ID (getNextNoBarcodeId) before persisting the product. If the kiosk sync fails and the user retries from the same screen, the previous attempt has already inserted a product locally, so the next call generates a different barcode and creates a second product, leaving the first unsynced entry behind. This only happens when a sync failure occurs and the user retries in no-barcode mode, but it can silently duplicate products in the manager DB and on the kiosk.

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