Segway-Ninebot

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1. Optimized the functional structure of the scooter's homepage to enhance the user experience
2. Added a self-diagnosis manual in the service and help module for scooters, balance cars, and other categories, making it easy to find and solve problems
3. E2, C2, F2 series scooters support viewing vehicle speed gears and corresponding remaining range on the device homepage
4. Fixed reported issues, optimized experience