Move the frame into draw.zig and the transitions out of layout.zig

Pure moves, no behaviour change. draw.zig holds the whole core frame in
order: render, the pane, tag, header and notice painters it calls, and the
character-effect composition (Pardes.render stays a declaration alias).
Presentation.zig is the panel presentation state as a file struct, and
animation.zig the easing curves, transition kinds, tracks and boxes, the
character effects' sources and the generic displayed-value transition, all
of which lived in layout.zig. layout.zig keeps only layout.

1 files changed, 2 insertions, 1 deletions

diff --git a/test/pdf.zig b/test/pdf.zig
index 3a592451..ed5d6908 100644
--- a/test/pdf.zig
+++ b/test/pdf.zig
@@ -7,6 +7,7 @@ const image = pardes.image;
 const config = pardes.config;
 const builtins = pardes.builtins;
 const layout = pardes.layout;
+const animation = pardes.animation;
 const dump = pardes.dump;
 
 const Pardes = pardes.Pardes;
@@ -1399,7 +1400,7 @@ test "PDF tint and tinted theme changes rebuild every visible raster only" {
     // Chrome animation reads a separate palette. Its ticks must never disturb
     // the target-theme tint key or ask MuPDF for the same pixels again.
     try std.testing.expect(p.animationActive());
-    for (0..layout.Animation.transition_steps) |_| {
+    for (0..animation.Animation.transition_steps) |_| {
         p.update(.tick);
         _ = frame.reset(.retain_capacity);
         const tick_surface = try p.render(frame.allocator());