Image editor: hide raw Prompt, use Resolution

Remove backend-assembled raw Prompt and copy action from image info; render a lightweight generationInputs snapshot (user panel inputs + reference thumbnails) stored on canvas layers and shown in the image info dialog. Unify canvas display and info to use originalWidth/originalHeight (Resolution) instead of saved Size and hydrate legacy layout width/height only as fallback. Add model/aspectRatio/imageSize options for character/icon generation (frontend state, tests, and client payloads). Increase Axum JSON body limit for character animation endpoint to 12MB for compatibility and prefer submitting persisted objectKey over large Data URLs. Update tests, docs, and related server/frontend code to reflect these behaviors and validations.

.hermes/shared-memory/pitfalls.md

@@ -39,6 +39,14 @@
 - 验证：`npm run test -- src/services/image-editor/editorImageReference.test.ts src/components/image-editor/ImageCanvasEditorView.test.tsx -t "editorImageReference|converts non-data-url quick edit source images before submitting references"`。
 - 关联：`src/services/image-editor/editorImageReference.ts`、`src/components/image-editor/ImageCanvasEditorView.tsx`、`docs/technical/【前端架构】图片画布编辑器MVP接入方案-2026-06-11.md`。
 
+## 图片编辑器角色动画不要默认提交大图 Data URL
+
+- 现象：图片编辑器里对角色图点击 `生成动画` 后，后端返回 `Failed to buffer the request body: length limit exceeded`，请求还没进入角色动画 handler。
+- 原因：角色动画生成请求曾把角色图片 `src` 原样作为 `sourceImageSrc` 放进 JSON；角色图如果是较大的 Data URL，会超过 Axum 默认 `2MB` body limit，在 `Json` 提取器阶段被拦截。
+- 处理：前端在角色图已持久化时优先提交 `objectKey`，只把 Data URL 作为未持久化本地临时图兜底；后端 `/api/editor/character-animations/generations` 单独配置 `12MB` body limit 兼容旧请求，但新链路不应依赖传大图 JSON。
+- 验证：`npm run test -- src/components/image-editor/ImageCanvasEditorView.test.tsx -t "only exposes character animation"`；`cargo test -p api-server editor_character_animation_accepts_character_image_body_above_default_limit --manifest-path server-rs/Cargo.toml`。
+- 关联：`src/components/image-editor/ImageCanvasEditorView.tsx`、`server-rs/crates/api-server/src/modules/play_flow.rs`、`server-rs/crates/api-server/src/app.rs`、`docs/【编辑器】画板角色形象生成入口设计-2026-06-15.md`。
+
 ## 图片编辑器生成类菜单要挂到页面级 portal
 
 - 现象：底部 `生成规范` 菜单、角色面板里的 `角色形象规范` 来源菜单点击后像没有弹出来，实际被按钮所在的局部滚动容器挡住了。