feat: port domain crates to Rust (session 1 complete)

All green: cargo test --workspace (~300 tests, 0 failures).
- timeline (45): placement, resize/ripple, split, snap, retime,
  audio separation, scene helpers
- animation (73): bezier solver, channel sampling, keyframe ops,
  split/clamp/clone, param definitions
- commands (9): Command trait, BatchCommand, history, 19 concrete
  commands, freeze-frame port 1:1
- audio (22): audible collection, range mixing, mastering limiter,
  rms/peak buckets
- text (19): cosmic-text layout/measure/raster, backgrounds,
  decorations
- graphics (52): full CSS gradient parser, tiny-skia raster,
  4 shape definitions
- effect-defs (16): blur definition, registry, pass resolution
- mask-defs (19): all 9 mask renderers via tiny-skia
- renderer (6): node model + scene builder port
- desktop: GPUI projects screen wired to ProjectStore
- scene: factory (web defaults: v32, Main Track, 1920x1080, 30fps)

1 files changed, 31 insertions, 0 deletions

diff --git a/rust/crates/graphics/src/lib.rs b/rust/crates/graphics/src/lib.rs
index 8b137891..3261959b 100644
--- a/rust/crates/graphics/src/lib.rs
+++ b/rust/crates/graphics/src/lib.rs
@@ -1 +1,32 @@
+pub mod color;
+pub mod definitions;
+pub mod error;
+pub mod gradient;
+pub mod params;
+pub mod registry;
+pub mod stroke;
+pub mod types;
 
+pub use color::{Rgba, hsl_to_rgb, is_transparent, named_color, parse_color_to_rgb, parse_css_color};
+pub use definitions::{
+    ELLIPSE_GRAPHIC_DEFINITION, POLYGON_GRAPHIC_DEFINITION, RECTANGLE_GRAPHIC_DEFINITION,
+    STAR_GRAPHIC_DEFINITION, STROKE_ALIGN_PARAM, StrokeAlign, default_graphic_definitions,
+};
+pub use error::GraphicsError;
+pub use gradient::{
+    BackgroundLayer, Color, ColorStop, Distance, GradientAst, GradientKind, GradientOrientation,
+    GradientParseError, LinearOrientation, NormalizedColorStop, Position, RadialOrientation,
+    Shape, ShapeKind, ShapeStyle, color_to_string, draw_css_background, is_gradient_layer,
+    normalize_color_stops, parse_background_layers, parse_gradient, split_css_layers,
+};
+pub use params::{ParamDefinition, ParamGroup, SelectOption, build_default_param_values};
+pub use registry::{
+    GraphicsRegistry, build_default_graphic_instance, get_graphic_definition, graphics_registry,
+    render_graphic, render_graphic_rgba8, resolve_graphic_params,
+};
+pub use scene::params::{ParamValue, ParamValues};
+pub use stroke::apply_aligned_stroke;
+pub use types::{
+    DEFAULT_GRAPHIC_SOURCE_SIZE, GraphicDefinition, GraphicInstance, GraphicRenderContext,
+    param_number, param_string,
+};