fixup! fix: expand heaven-earth-gap to 30pt to accommodate equal 19pt gaps for both heaven and earth inactive beads

fixup! fix: expand heaven-earth-gap to 30pt to accommodate equal 19pt gaps for both heaven and earth inactive beads

Adjust active earth bead positioning from 2pt to 1pt gap to match
active heaven beads distance from reckoning bar, ensuring consistent
active bead positioning for both heaven and earth beads.

Also updates visual regression reference image to reflect the
improved active bead positioning consistency.

templates/flashcards.typ

@@ -171,7 +171,7 @@
         #for i in range(4) [
           #let is-active = i < earth-active
           #let earth-y = if is-active {
-            heaven-earth-gap + bar-thickness + 2pt + bead-size / 2 + i * (bead-size + bead-spacing)
+            heaven-earth-gap + bar-thickness + 1pt + bead-size / 2 + i * (bead-size + bead-spacing)
           } else {
             total-height - (4 - i) * (bead-size + bead-spacing) - 5pt + bead-size / 2
           }