Initial commit: AI-driven visual novel scaffold

- Monorepo (pnpm workspace): apps/web + packages/{types,ai-client,engine}
- Next.js 16 web app with three-stage AI orchestration
- Three independently configurable providers: text LLM, image generator, vision model
- Warm minimalist editorial UI design
- One-click Vercel deploy ready

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

packages/engine/src/director.ts

@@ -0,0 +1,37 @@
+import { chat } from "@dada/ai-client";
+import type { ProviderConfig, Session, StoryFrame, UIElement } from "@dada/types";
+import { parseJsonLoose } from "./jsonParser";
+import { DIRECTOR_SYSTEM, buildDirectorUserMessage } from "./prompts";
+
+type DirectorOutput = {
+  narration?: string;
+  speaker?: string;
+  line?: string;
+  scenePrompt: string;
+  uiElements: UIElement[];
+};
+
+export async function direct(
+  config: ProviderConfig,
+  session: Session,
+): Promise<StoryFrame> {
+  const raw = await chat(
+    config,
+    [
+      { role: "system", content: DIRECTOR_SYSTEM },
+      { role: "user", content: buildDirectorUserMessage(session) },
+    ],
+    { temperature: 0.9, responseFormat: "json_object" },
+  );
+
+  const parsed = parseJsonLoose<DirectorOutput>(raw);
+
+  return {
+    id: `frame_${Date.now()}`,
+    narration: parsed.narration?.trim() || undefined,
+    speaker: parsed.speaker?.trim() || undefined,
+    line: parsed.line?.trim() || undefined,
+    scenePrompt: parsed.scenePrompt,
+    uiElements: parsed.uiElements ?? [],
+  };
+}