Animations: nine PowerPoint exit effects import as themselves (#147)

Exit effects DeckCraft had no entry for (Peek Out, Strips, Blinds, Box,
Checkerboard, Diamond, Sink Down, Spinner, Contract) imported as a plain
Fade and lost their direction, so a Peek Out or Sink Down didn't move.
Each mirrors an entrance DeckCraft already plays, so it is played as that
entrance in reverse (Sink Down as Rise Up, leaving downward); the import
keeps PowerPoint's direction and saving writes a matching filter or
motion. Float Out now also writes its motion.

The preset ids and directions come from PowerPoint: every effect, as
entrance and exit, in every direction it accepts, saved and read back.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

crates/anim/src/effects.rs

@@ -44,6 +44,15 @@ pub(crate) fn exit_base(effect: &str) -> &str {
         "swivelOut" => "swivel",
         "bounceOut" => "bounce",
         "dissolveOut" => "dissolve",
+        "blindsOut" => "blinds",
+        "boxOut" => "box",
+        "checkerboardOut" => "checkerboard",
+        "diamondOut" => "diamond",
+        "peekOut" => "peek",
+        "stripsOut" => "strips",
+        "sinkDown" => "rise",
+        "spinnerOut" => "spinner",
+        "contract" => "expand",
         other => other,
     }
 }

crates/anim/src/tests.rs

@@ -789,3 +789,15 @@ fn show_follows_links() {
     assert_eq!(s.follow(&p, &Action::LastViewed, None), LinkJump::None);
     assert_eq!(s.slide, 3);
 }
+
+/// #147: exits PowerPoint plays downward leave downward here too.
+#[test]
+fn sink_down_and_peek_out_to_bottom_move_down() {
+    for (effect, option) in [("sinkDown", ""), ("peekOut", "b"), ("floatOut", "d")] {
+        let mut a = anim(1, AnimClass::Exit, effect, AnimStart::OnClick);
+        a.option = option.into();
+        let tl = Timeline::new(&slide_with(vec![a]), W, H);
+        let s = tl.state(ShapeId(1), None, 0, 0.5);
+        assert!(s.offset_y > 0.0, "{effect} {option}: {s:?}");
+    }
+}

crates/anim/src/timeline.rs

@@ -471,7 +471,8 @@ fn build_spec(a: &Animation, xf: Xfrm, sw: f64, sh: f64, resolve: &dyn Fn(&deckc
     EffectSpec {
         class: a.class,
         effect,
-        option: a.option.clone(),
+        // Sink Down is Rise Up played backwards, leaving downward.
+        option: if a.effect == "sinkDown" { "d".into() } else { a.option.clone() },
         accel: a.smooth_start,
         decel: a.smooth_end,
         bounce: a.bounce_end,