feat(character): appearance/motive 全栈穿线 + motive/traits 口径重切

打通 appearance/motive 从生成→schema→契约→落库→前端整条穿线
（DB 列早在初始迁移、此前一直 NULL，无新迁移），并原子重切人物
内驱口径。

- @llm: CharacterCard/character-gen.md 加 appearance/motive（给默认值守
  解析韧性），重切——动机唯一落 motive、traits 只留核心/表层/阴影三层、
  arc 引用 motive；regen prompt_hashes.json 金标准。
- @backend: CharacterCardView + CharacterWriteRepo/SqlCharacterWriteRepo
  （create + update backfill 分支）+ CharacterWriteFields + 路由双向形变
  与 _existing_characters 带上两字段。
- @frontend: pnpm gen:api 重生成 TS 客户端；CharacterCardItem 展示/编辑
  两字段。
- 测试: schema 默认值/解析、动机不双写重切回归、card_to_view 双向、
  ingest 透传、list 暴露、SqlCharacterWriteRepo create/backfill 真 pg 集成。

apps/web/components/generation/CharacterCardItem.tsx

@@ -55,6 +55,40 @@ export function CharacterCardItem({
         </p>
       ) : null}
 
+      {onEdit || card.appearance ? (
+        <div className="mb-1 flex items-start gap-1 text-ink-soft">
+          <span className="shrink-0 text-ink">外貌：</span>
+          {onEdit ? (
+            <TextInput
+              value={card.appearance ?? ""}
+              onChange={(e) => onEdit({ appearance: e.target.value })}
+              aria-label="外貌形象"
+              controlSize="sm"
+              className="min-w-0 flex-1"
+            />
+          ) : (
+            <span>{card.appearance}</span>
+          )}
+        </div>
+      ) : null}
+
+      {onEdit || card.motive ? (
+        <div className="mb-1 flex items-start gap-1 text-ink-soft">
+          <span className="shrink-0 text-ink">动机：</span>
+          {onEdit ? (
+            <TextInput
+              value={card.motive ?? ""}
+              onChange={(e) => onEdit({ motive: e.target.value })}
+              aria-label="核心动机"
+              controlSize="sm"
+              className="min-w-0 flex-1"
+            />
+          ) : (
+            <span>{card.motive}</span>
+          )}
+        </div>
+      ) : null}
+
       <p className="mb-1 text-ink-soft">
         <span className="text-ink">背景：</span>
         {card.backstory}

apps/web/lib/api/schema.d.ts

@@ -922,9 +922,21 @@ export interface components {
             role: string;
             /**
              * Traits
-             * @description 性格特质清单
+             * @description 性格特质清单（性格三层）
              */
             traits?: string[];
+            /**
+             * Appearance
+             * @description 外貌形象（缺则空串）
+             * @default
+             */
+            appearance: string;
+            /**
+             * Motive
+             * @description 核心动机/欲望/恐惧（缺则空串）
+             * @default
+             */
+            motive: string;
             /**
              * Backstory
              * @description 背景故事

apps/web/lib/generation/cards.test.ts

@@ -23,6 +23,8 @@ import {
 const card = (over: Partial<CharacterCardView> = {}): CharacterCardView => ({
   name: "甲",
   role: "主角",
+  appearance: "白衣如雪",
+  motive: "为家族正名",
   backstory: "出身寒门",
   arc: "由怯转勇",
   ...over,
@@ -86,6 +88,18 @@ describe("updateCard", () => {
     expect(original.name).toBe("甲");
     expect(next).not.toBe(original);
   });
+
+  it("patches appearance/motive without dropping the other fields", () => {
+    const original = card();
+    const next = updateCard(original, {
+      appearance: "玄色劲装",
+      motive: "复仇",
+    });
+    expect(next.appearance).toBe("玄色劲装");
+    expect(next.motive).toBe("复仇");
+    expect(next.backstory).toBe(original.backstory);
+    expect(original.appearance).toBe("白衣如雪"); // no mutation
+  });
 });
 
 describe("extractIngestConflicts", () => {