UI: comment keyboard font set to DejaVu Serif 48 Bold; fix GetTextDialog key init and clamp oewindow index

[No0ne558]

Short summary

• Sets the comment keyboard font to DejaVu Serif 48 Bold.
• Fixes GetTextDialog key initialization.
• Clamps the oewindow index to prevent out-of-bounds behavior.

Files changed

• changelog.md — update changelog entry
• dialog_zone.cc — fix GetTextDialog key init
• order_zone.cc — clamp oewindow index

Testing / Notes

• Verify the comment keyboard displays using DejaVu Serif 48 Bold.
• Test GetTextDialog entry to ensure keys initialize correctly.
• Reproduce cases that previously caused oewindow index issues and confirm no out-of-bounds errors occur.
• Run unit/integration tests and UI smoke tests as usual.