[kareltucek]

Summary of the re-implementation

• right/src/usb_report_updater.{c,h} — added the UsbReportWindowEstimate global and the USB_REPORT_WINDOW_LOOKAHEAD_MS = 4 constant. blockedByKeystrokeDelay() now also
  blocks when the estimate is more than 4 ms in the future, picks the later of the keystroke-delay and throttle deadlines, and reschedules the postponer accordingly.
• right/src/hid/transport.cpp — added per-transport interval constants (USB 1 ms, BLE HID 11 ms, Dongle 7 ms) plus two helpers:
  • noteReportDispatched(sink) — sets estimate to now + 2 * interval (worst case) right after a successful dispatch in Hid_Send{Keyboard,Mouse,Controls}Report.
  • noteReportSent(transport) — reduces estimate to now + interval from Hid_{Keyboard,Mouse,Controls}ReportSentCallback and wakes the main loop so the throttle releases
    promptly.
  • The three send functions were lightly refactored (switch writes to a local result instead of returning early) so the dispatch hook lives in one place at the bottom.
• For the dongle path the right side has no direct send-completion callback, so the estimate naturally decays from now + 14 ms toward the lookahead window — slightly more
  conservative than BLE/USB but still self-recovering.
• Verified by building uhk-80-right via ./build.sh right make. Both transport.cpp.obj and usb_report_updater.c.obj were rebuilt.