better performance

USE_CASES.md

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+# Clean Scanner Use Cases
+
+## 1. Everyday Personal Use
+- Scan restaurant menus, product QR labels, and website links quickly.
+- Copy/share scanned values to chat apps or notes.
+- Open links directly with local risk warning support.
+
+## 2. Event & Ticketing
+- Scan tickets at venues and quickly validate repeated entries.
+- Use batch mode to process multiple attendees without leaving the camera.
+- Share batch captures to organizers for quick reconciliation.
+
+## 3. Inventory & Operations
+- Scan product barcodes in stock rooms.
+- Use batch mode for continuous scanning of many items.
+- Export and share history (TXT/CSV/JSON) for downstream reporting.
+
+## 4. Field Work & Service Teams
+- Scan device labels/serials on-site.
+- Save local history for audit trails when enabled.
+- Share captured codes with support teams in real time.
+
+## 5. Office & Admin Workflows
+- Scan contact QR/vCard and add to contacts.
+- Scan Wi-Fi setup QR and jump to Wi-Fi settings.
+- Scan calendar/event data and create calendar entries.
+
+## 6. Communication Shortcuts
+- Scan phone/SMS/email QR data.
+- One-tap actions: call, send SMS, send email.
+- Reduce manual entry errors for phone numbers and addresses.
+
+## 7. Security-Conscious Browsing
+- Scan URL QR codes and get local warning prompts for suspicious patterns.
+- Decide whether to open risky links with explicit confirmation.
+- Keep scanning offline-first without backend calls.
+
+## 8. Offline / Low-Connectivity Scenarios
+- Use the scanner with no internet dependency for core scanning.
+- Keep data local-first and share outputs when connectivity returns.
+- Useful for travel, warehouses, and remote job sites.
+
+## 9. Accessibility & Speed
+- Launch directly into camera for 0-click scan flow.
+- Pinch-to-zoom for small or distant QR/barcodes.
+- Friendly scanner guide with immediate feedback on successful scans.
+
+## 10. Team Handover & Data Transfer
+- Export scan history in multiple formats:
+  - TXT for human-readable logs
+  - CSV for spreadsheets/BI tools
+  - JSON for system integrations
+- Share exports to teammates via native Android share sheet.