feat: 完成 B 群組 — 資料層與核心領域模型

- 導入 Prisma 7.9.1 + SQLite（better-sqlite3 driver adapter），prisma.config.ts 管理連線設定
- 完整資料模型：User／Work／Character／CharacterAlias／EpisodicMemory／SemanticMemory／
  ProceduralRule／EmotionState／Relationship／SentimentLedgerEntry
- packages/db：Prisma Client 存取層（ESM，因 Prisma 7 產出的 generated client 僅支援 ESM）
- apps/api 隨之改為 ESM 以相容 packages/db
- packages/shared：新增角色／記憶／情緒／關係共用型別，api 與 web 皆從此匯入
- prisma/seed.ts：建立測試使用者與元氣型測試角色，含完整關係帳本與記憶種子資料
- apps/api：新增 GET /characters
- scripts/smoke/B.mjs：驗證資料表齊全、API 讀出種子角色、關係與記憶可寫入讀出
- 保留 Prisma 官方隨 CLI 附的 agent skill 文件（.agents/skills 等），供後續群組查閱

npm run restart && npm run smoke -- B 皆通過（B-V），A 群組冒煙測試無回歸。

packages/shared/src/domain/character.ts

@@ -0,0 +1,27 @@
+export type CharacterSource = "ORIGINAL" | "EXISTING_WORK";
+export type CharacterBuildStatus = "CANDIDATE" | "BUILT";
+
+export interface CharacterAlias {
+  id: string;
+  formalName: string;
+  nickname?: string | null;
+  calledByOthers?: string | null;
+}
+
+// 角色設定表七欄位 + 來源／建置狀態
+export interface Character {
+  id: string;
+  workId?: string | null;
+  source: CharacterSource;
+  buildStatus: CharacterBuildStatus;
+  basicInfo: string;
+  backgroundStory: string;
+  personalityArchetype: string;
+  likesDislikes: string;
+  goalsObsessions: string;
+  speechStyle: string;
+  initialRelationValue?: string | null;
+  createdAt: string;
+  updatedAt: string;
+  aliases?: CharacterAlias[];
+}

packages/shared/src/domain/emotion.ts

@@ -0,0 +1,10 @@
+export interface EmotionState {
+  characterId: string;
+  calm: number; // 平靜
+  joy: number; // 愉悅
+  sad: number; // 低落
+  alert: number; // 警戒
+  shy: number; // 害羞
+  grumpy: number; // 彆扭
+  updatedAt: string;
+}

packages/shared/src/domain/memory.ts

@@ -0,0 +1,31 @@
+// 情緒標籤類型：對應情緒子系統六種狀態（見 D 群組）
+export type EmotionTag = "CALM" | "JOY" | "SAD" | "ALERT" | "SHY" | "GRUMPY";
+export type MemorySource = "INTERACTION" | "OFFLINE_GENERATED" | "SOURCE_EXTRACTION";
+
+export interface EpisodicMemory {
+  id: string;
+  characterId: string;
+  content: string;
+  occurredAt: string;
+  emotionTag: EmotionTag;
+  emotionIntensity: number;
+  retrievalCount: number;
+  lastRetrievedAt?: string | null;
+  source: MemorySource;
+  weight: number;
+}
+
+export interface SemanticMemory {
+  id: string;
+  characterId: string;
+  fact: string;
+  about: string;
+}
+
+export interface ProceduralRule {
+  id: string;
+  characterId: string;
+  situation: string;
+  responsePattern: string;
+  weight: number;
+}

packages/shared/src/domain/relationship.ts

@@ -0,0 +1,26 @@
+export type RelationshipStage =
+  | "STRANGER" // 陌生 0-19
+  | "ACQUAINTANCE" // 認識 20-39
+  | "FRIEND" // 朋友 40-59
+  | "CLOSE_AMBIGUOUS" // 摯友-曖昧 60-79
+  | "BONDED"; // 羈絆 80-100
+
+export interface SentimentLedgerEntry {
+  id: string;
+  date: string;
+  event: string;
+  weight: number; // 允許正負
+}
+
+export interface Relationship {
+  id: string;
+  characterId: string;
+  userId: string;
+  intimacy: number; // 0~100
+  trust: number; // 0~100
+  firstMet?: string | null;
+  lastInteraction?: string | null;
+  interactionCount: number;
+  stage: RelationshipStage;
+  ledgerEntries?: SentimentLedgerEntry[];
+}

packages/shared/src/index.ts

@@ -1,2 +1,6 @@
 export * from "./result.js";
 export * from "./log.js";
+export * from "./domain/character.js";
+export * from "./domain/memory.js";
+export * from "./domain/emotion.js";
+export * from "./domain/relationship.js";