Shader assets: graph-built shaders, the Shader tab and sprite rows from the graph (#62)

A shader is an asset carrying a node graph (Texture color, Output, Property,
Color, Add/Subtract/Multiply/Divide, Mix, Luminance) that compiles to the GLSL
fragment of a Pixi filter. The Shader tab reuses the Behavior canvas; a sprite
wears a shader through its Shader picker, and the rows below it are the
graph's Property nodes. Property schema, resolution and deviation take the
project because a sprite's rows now live in another asset. The built-in
registry of the prototype is gone; "Adjust colors" ships as a graph in the
fixture and the three example games.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

src/core/properties/deviation.ts

@@ -3,20 +3,20 @@ import { ancestorIdsOf, type ObjectTree } from '../model/hierarchy';
 import { instanceTargetOf, isEmptyEdit, resolveObjects } from '../model/instance';
 import { findAsset, type Project } from '../model/Project';
 import type { SceneObject } from '../model/SceneObject';
-import { type PropertySchema, schemaFor, schemaForAsset } from './PropertySchema';
+import { type PropertySchema, schemaFor, schemaForAsset, schemaForObject } from './PropertySchema';
 import { deviatesFromAsset, isModified } from './resolve';
 
 /**
  * The rows the asset inspector marks as modified. A behavior's variables are left out: their
  * default is declared on the variable itself, so the asset value cannot differ from it.
  */
-export function markedAssetSchema(asset: Asset): PropertySchema {
-  return asset.type === 'behavior' ? schemaFor('behavior') : schemaForAsset(asset);
+export function markedAssetSchema(project: Project, asset: Asset): PropertySchema {
+  return asset.type === 'behavior' ? schemaFor('behavior') : schemaForAsset(project, asset);
 }
 
 /** Whether any asset property the inspector would mark gold differs from its default. */
-export function assetDeviates(asset: Asset): boolean {
-  return markedAssetSchema(asset).some((def) => isModified(asset, def.key));
+export function assetDeviates(project: Project, asset: Asset): boolean {
+  return markedAssetSchema(project, asset).some((def) => isModified(project, asset, def.key));
 }
 
 /**
@@ -33,8 +33,9 @@ export function objectDeviates(project: Project, holder: ObjectTree, object: Sce
   }
   if (object.editorOffset.x !== 0 || object.editorOffset.y !== 0) return true;
   const asset = findAsset(project, object.assetId);
-  return (
-    asset !== undefined && schemaForAsset(asset).some((def) => deviatesFromAsset(object, asset, def.key))
+  if (!asset) return false;
+  return schemaForObject(project, asset, object).some((def) =>
+    deviatesFromAsset(project, object, asset, def.key),
   );
 }