Post-review cleanups, no behaviour change:
- botScanCommands() parsed the command name and its two args with three
near-identical read-token loops; extracted a single readToken() lambda.
- Fn+Esc lock branch turned the display on twice (the unlock arm repeated
what the branch head already did); dropped the redundant call.
- setGpioMode()'s comment said "Cycle" (cycling lives in GpioScreen); now
describes what it actually does — set a specific mode + persist.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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