Deliver SV6FAST U1.0.7 battery and zeroing fixes
Constraint: Factory branch must contain only the verified lvgl_demo artifact. Rejected: Source handoff branch | User requested the new single-file delivery path. Confidence: high Scope-risk: narrow Directive: Keep sv6fast as a single-file lvgl_demo delivery branch. Tested: SV6FAST battery and zeroing regression scripts, Python compilation, clean AArch64 build, local and remote SHA256. Not-tested: Real-device battery-state and zeroing-display validation.
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