Trouble Makers v0.3.8

What's fixed

• Fixed the intermittent vertical black line at the original 4:3 right
  boundary in widescreen mode. It could flash for a frame as Marina and the
  camera moved horizontally through a stage.
• RT64's rectangle-edge correction now only expands an underfilled edge. It
  no longer shrinks a valid background tile that extends slightly beyond the
  original 4:3 scissor, so adjacent widescreen tiles meet without exposing the
  black wing clear underneath.
• The fix preserves the per-frame wing clear, avoiding the stale sprites and
  scenery trails that appear when the clear is disabled.

Validation

• Captured and inspected 360 consecutive widescreen frames across multiple
  occurrences of the affected scroll phase, with no remaining black seam.
• Captured and inspected a 120-frame original-aspect run to confirm that 4:3
  framing, background layers, sprites, HUD, and movement remain unchanged.
• Rebuilt the release target and passed all telemetry, controls, and session
  log tests.

Full changelog: v0.3.7...v0.3.8