feat(design): integrate conversation-first creation flow

tests/unit/youth-form-projection.test.ts

@@ -139,7 +139,7 @@ describe('youth Design projection', () => {
     expect(model.readinessMessage).not.toContain('可以开始制作');
   });
 
-  it('shows only the first consequential choice and concrete quote blockers', () => {
+  it('projects concrete quote blockers without exposing server decision prompts', () => {
     const workspace = designWorkspaceFixture({
       form: designFormFixture({
         decisionPrompts: [{
@@ -174,8 +174,6 @@ describe('youth Design projection', () => {
     const model = projectYouthCreationCard(workspace, { quoteBlockers: blockers });
 
     expect(model.phase).toBe('exploring');
-    expect(model.activeChoice?.id).toBe('question-1');
-    expect(model.activeChoice?.options).toHaveLength(3);
     expect(model.blockers).toEqual([{
       ...blockers[0],
       message: '先选择作品形状。',