feat: перейти на изолированный контракт генерации

- добавлены независимые adapters для шести exact modes
- runtime переведён на JavaScript с отдельными декларациями
- generated output перенесён в .svg-sprite
- удалены legacy pipeline и встроенный preview

src/core/compiled-artifact.ts

@@ -0,0 +1,70 @@
+import { getSpriteShapeId } from '../shape-id.js'
+import type { SpriteFormat } from '../types.js'
+
+export type CompiledIconColor = {
+  readonly variable: string
+  readonly fallback: string
+}
+
+export type CompiledIcon = {
+  readonly name: string
+  readonly id: string
+  readonly viewBox: string | null
+  readonly colors: readonly CompiledIconColor[]
+}
+
+export type CompiledSpriteArtifact = {
+  readonly format: SpriteFormat
+  readonly bytes: Uint8Array
+  readonly icons: readonly CompiledIcon[]
+}
+
+function extractColors(fragment: string): CompiledIconColor[] {
+  const colors = new Map<string, string>()
+  const regex = /var\((--icon-color-\d+),\s*((?:[^()]|\([^()]*\))*)\)/g
+  let match: RegExpExecArray | null
+
+  while ((match = regex.exec(fragment)) !== null) {
+    if (!colors.has(match[1])) colors.set(match[1], match[2].trim())
+  }
+
+  return [...colors].map(([variable, fallback]) => ({ variable, fallback }))
+}
+
+/** Преобразует compiled SVG в нейтральный artifact для adapter codegen. */
+export function createCompiledSpriteArtifact(
+  bytes: Uint8Array,
+  iconNames: readonly string[],
+  format: SpriteFormat,
+): CompiledSpriteArtifact {
+  const shapes = new Map<string, { viewBox: string | null; fragment: string }>()
+  const content = new TextDecoder().decode(bytes)
+  const shapeRegex = /<(symbol|svg)\b((?=[^>]*\bid="[^"]+")[^>]*)>[\s\S]*?<\/\1>/g
+  let match: RegExpExecArray | null
+
+  while ((match = shapeRegex.exec(content)) !== null) {
+    const attributes = match[2]
+    const id = attributes.match(/\bid="([^"]+)"/)?.[1]
+    if (!id) continue
+
+    shapes.set(id, {
+      viewBox: attributes.match(/\bviewBox="([^"]+)"/)?.[1] ?? null,
+      fragment: match[0],
+    })
+  }
+
+  const icons = iconNames.map((name) => {
+    const id = getSpriteShapeId(name)
+    const shape = shapes.get(id)
+    if (!shape) throw new Error(`Cannot find SVG shape "${id}" for icon "${name}".`)
+
+    return {
+      name,
+      id,
+      viewBox: shape.viewBox,
+      colors: extractColors(shape.fragment),
+    }
+  })
+
+  return { format, bytes, icons }
+}