PHLEGM v4 legacy iNES + GUI clipping checkpoint

NES cartridge compatibility
- Detect nonzero legacy iNES padding in header bytes 12-15 when the image is not NES 2.0.
- Ignore bytes 7-15 for mapper/extension decoding in that legacy-contaminated case.
- This recovers the classic DiskDude header failure where mapper 0 is misread as mapper 64.
- Preserve/log the raw 16-byte header and emit an explicit recovery warning.

GUI layout
- Expand the multi-line status region from the old clipped 54-pixel box.
- Reflow compile progress and history below the complete status summary.
- Preserve resizable command-tree behavior and the existing bottom command/button row.
