feat(web): complete product workflow implementation

web/protocol/paint.ts

@@ -1,4 +1,4 @@
-import type { SculptBrush, SculptMeshAttributesIR, SculptStrokeIR } from "./sculpt";
+import type { SculptBrush, SculptMeshAttributesIR, SculptStrokeIR, SculptStrokeSampleIR } from "./sculpt";
 
 export const PAINT_BUDGET = {
   maxSamples: 100_000,
@@ -106,12 +106,30 @@ export function createSculptStroke(
   pressure: number,
   symmetry: [boolean, boolean, boolean],
   mirrorObjectSpace: boolean,
+  cursorSamples: ReadonlyArray<SculptStrokeSampleIR> = [],
 ): SculptStrokeIR {
+  const samples = cursorSamples.length > 0
+    ? cursorSamples.slice(0, 2048).map((sample) => ({
+      position: [...sample.position] as [number, number, number],
+      normal: [...sample.normal] as [number, number, number],
+      radius,
+      strength,
+      pressure,
+      time: sample.time,
+    }))
+    : Array.from({ length: 3 }, (_, index) => ({
+      position: [0, 0, index * 0.01] as [number, number, number],
+      normal: [0, 0, 1] as [number, number, number],
+      radius,
+      strength,
+      pressure,
+      time: index,
+    }));
   return {
     schemaVersion: 1,
     meshId,
     brush,
-    samples: [{ position: [0, 0, 0], normal: [0, 0, 1], radius, strength, pressure, time: 0 }],
+    samples,
     symmetry,
     mirrorObjectSpace,
   };