v1.2

Johnny Castaway native macOS screensaver — v1.2

Six bug fixes and one new feature since v1.1.

1. INTRO.SCR title screen

   The original Sierra intro screen (INTRO.SCR) now displays on
   screensaver activation with a cycling wipe transition, matching
   the feel of the original Windows release. A black-screen hang
   that occurred when a resource failed to load mid-intro was also
   fixed.

2. CPU spin after extended runtime

   After several hours of running, the onBackgroundTick
   wave-animation closure entered a Swift exclusivity spin, pegging
   one CPU core at 99% indefinitely. Fixed by eliminating the
   closure capture that triggered the exclusivity violation.

3. Sprite clipping (SET_CLIP_ZONE not enforced)

   SET_CLIP_ZONE was stored on the thread but never applied to
   sprite or rect drawing. The symptom was sprites appearing above
   the palm canopy and above the island surface — e.g. Johnny
   sleeping above the tree, or fish visible outside the fishing-
   close-up frame. All draw primitives now honour the clip rect.

4. Walk to Spot.A skipped

   When the next scene started at the leftmost anchor (Spot.A),
   the walk controller incorrectly detected a zero-distance walk
   and skipped it, leaving Johnny at his previous position.
   Fixed by checking the destination spot rather than the
   displacement vector.

5. Scene-start flicker

   A one-frame flash of the previous scene appeared when a new
   scene began, because the outgoing thread's layer was composited
   one tick after the scene transition. Fixed.

6. Cloud placement

   The cloud Y-position formula misread rand() % (135 - N) as
   a lower bound rather than a range size, placing all clouds too
   high on the screen. Fixed; clouds now distribute correctly
   across the sky.