[fabox-os]

Tenth PR in the stack. Base is #25 (→ #24 → … → #17). Merge #16 to #25 first.

Event list

• Pitch bend shows its full 14-bit value (it was clamped to one byte).
• Channel pressure shows as Aftertouch.
• Each System Exclusive message is one row, with its bytes in hex in the Info column.

SysEx entry

• SysEx… in the event list header opens a window. Type a message in hex (F0 … F7, with or without 0x, separated by spaces or commas).
• Insert puts it into the selected MIDI region at the playhead. The text is checked first, and the window says what is wrong with it.

Fixes found while reviewing

• A followed MIDI clock port that is missing was searched for on every frame. It is now looked for every three seconds.
• Clearing the followed clock port kept its name, so choosing that port again waited out the retry time for nothing. The test that caught this is in the PR.

Testing

• cargo xtask check passes all 7 steps with Add the 10 missing interface strings to every locale #16 included (run on this branch plus Add the 10 missing interface strings to every locale #16).
• SysEx parsing and insertion tests (hex forms, framing, length, refusal on audio regions).
• Event list tests: a SysEx message is one row, and a bend keeps its 14 bits.
• Clock input: the retry throttle, and the real-port test still passes.
• All 16 locales have the new strings (machine-written; they need a native-speaker check).
• Screenshot scenes (default, extras, select-all, MIDI out, settings, track menu) render without panics.

Not done: SysEx for audio, Pattern and Drummer regions; the Length column is empty for SysEx rows.

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