feat(web): 立项新增 基调/结局/视角 三字段（书级常量入 stable_core 缓存前缀）

灵感计划 §3④ + §4 D 枚举决策：
- projects 表加 tone/ending_type/narrative_pov（Text nullable、无 CHECK，同 genre/structure；
  迁移 e5f6a7b8c9d0 nullable 免 backfill）。
- ProjectCreateRequest/ProjectResponse + domain ProjectCreate/ProjectView 全链路透传（snake_case）。
- 完整 stable_core 链路：ProjectSpecView + SqlProjectSpecRepo.spec + _build_spec_section 渲染进
  「作品蓝本」块——书级常量随书稳定，字节稳定守缓存前缀不变量 #9，绝不入 volatile。
- 前端 wizard.ts 三字段 + 预设数组 TONES/ENDING_TYPES/NARRATIVE_POVS + ProjectWizard 控件与确认页回显。
- 契约变更已 pnpm gen:api + memory/contracts.md 登记。

apps/web/lib/wizard/wizard.ts

@@ -10,6 +10,10 @@ export interface WizardForm {
   premise: string;
   protagonist: string;
   theme: string;
+  // 立项书级常量（灵感④）：基调 / 结局取向 / 叙事视角。
+  tone: string;
+  endingType: string;
+  narrativePov: string;
 }
 
 export const WIZARD_STEPS = 5;
@@ -32,11 +36,18 @@ export const emptyWizardForm: WizardForm = {
   premise: "",
   protagonist: "",
   theme: "",
+  tone: "",
+  endingType: "",
+  narrativePov: "",
 };
 
 export const GENRES = ["玄幻", "仙侠", "都市", "科幻", "历史", "悬疑"];
 export const STRUCTURES = ["三幕", "故事圈", "雪花"];
 export const SELLING_POINT_PRESETS = ["逆袭", "打脸", "系统流", "双男主", "群像"];
+// 立项书级常量预设（灵感④ / D 枚举）——free text 单选，命不中预设可留空。
+export const TONES = ["热血", "轻松", "沉重", "治愈", "暗黑", "爽文"];
+export const ENDING_TYPES = ["HE", "BE", "开放", "正剧"];
+export const NARRATIVE_POVS = ["第一人称", "第三人称限知", "第三人称全知", "多视角"];
 
 // 每一步可否前进：仅第 1 步（书名）必填，其余可空着继续（草稿式立项）。
 export function canAdvance(step: number, form: WizardForm): boolean {
@@ -75,5 +86,8 @@ export function toCreateRequest(form: WizardForm): ProjectCreateRequest {
     theme: trim(form.theme),
     selling_points: form.sellingPoints,
     structure: trim(form.structure),
+    tone: trim(form.tone),
+    ending_type: trim(form.endingType),
+    narrative_pov: trim(form.narrativePov),
   };
 }