diff --git a/docs/project-memory/shared-memory/pitfalls.md b/docs/project-memory/shared-memory/pitfalls.md
index fe42622ad..65ad961aa 100644
--- a/docs/project-memory/shared-memory/pitfalls.md
+++ b/docs/project-memory/shared-memory/pitfalls.md
@@ -448,6 +448,14 @@
 - 验证：`npm run test -- src/services/image-editor/editorProjectClient.test.ts src/components/image-editor/useImageCanvasGenerationSubmissionWorkflow.test.tsx`；`cargo test -p api-server inline_data_url --manifest-path server-rs/Cargo.toml`。
 - 关联：`src/components/image-editor/useImageCanvasGenerationSubmissionWorkflow.ts`、`src/services/image-editor/editorProjectClient.ts`、`server-rs/crates/api-server/src/editor_generation_queue.rs`、`docs/technical/【前端架构】图片画布编辑器MVP接入方案-2026-06-11.md`。
 
+## 专用生成契约不能被通用生成接口和任务摘要绕过
+
+- 现象：专用场景接口要求结构化 `sceneContent + stylePreset`，但调用方仍可向通用图片接口传 `kind = scene` 或 `assetKind = scene`，用任意完整 Prompt 生成并持久化正式场景；合法场景入队后，任务侧栏还可能显示后端完整规则文本和通用“生成图片”标题，空白素材名则可能回退成完整 Prompt。
+- 原因：专用 handler 内部复用了通用图片 payload、队列和 Worker，但公开通用 HTTP handler 没有限制专用身份；任务摘要又无条件优先提取 payload 顶层 `prompt`，素材名默认值只处理了字段省略，没有处理空白字符串。
+- 处理：公开通用 handler 拒绝专用 `kind / assetKind`，专用 handler 仍可直接调用内部共享执行函数；队列投影按 `kind = scene` 从权威 `generationInputs.fields[画面内容]` 派生标题和摘要，缺字段时失败关闭而不是回退内部 Prompt，并重新计算历史缓存；专用素材名统一把省略和空白收口为产品默认值。
+- 验证：路由测试先证明旁路会越过 HTTP 边界，再断言两种旁路均返回 `400` 且指向专用端点；摘要测试覆盖新任务、历史错误缓存和缺少画面内容三种情况；标签测试覆盖省略、空白、自定义和 80 字上限。
+- 关联：`server-rs/crates/api-server/src/editor_project.rs`、`server-rs/crates/spacetime-module/src/external_generation.rs`、`docs/technical/【技术方案】图片画布游戏场景生成链路-2026-08-04.md`。
+
 ## 图片编辑器角色动画必须提交稳定图片引用
 
 - 现象：图片编辑器里对尚未上传的角色图点击 `生成动画` 后，前端或后端返回 `sourceImageSrc 必须先上传 OSS`。
diff --git a/docs/technical/【技术方案】图片画布游戏场景生成链路-2026-08-04.md b/docs/technical/【技术方案】图片画布游戏场景生成链路-2026-08-04.md
index 3e3d67936..7466ae155 100644
--- a/docs/technical/【技术方案】图片画布游戏场景生成链路-2026-08-04.md
+++ b/docs/technical/【技术方案】图片画布游戏场景生成链路-2026-08-04.md
@@ -83,7 +83,7 @@ assetLabel?
 canvasCompletion?
 ```
 
-请求不接受前端组装后的完整 `prompt`。本期不修改 `/api/external/v1`。
+请求不接受前端组装后的完整 `prompt`。通用 `/api/editor/images/generations` 也必须拒绝 `kind = scene` 或 `assetKind = scene`，防止调用方绕过结构化字段校验和后端 Prompt 组装。本期不修改 `/api/external/v1`。
 
 完整 Provider Prompt 仍只能由后端生成。
 
@@ -121,6 +121,8 @@ prompt = 后端完整 Prompt
 
 随后复用 `enqueue_editor_image_generation_for_owner`，队列类型继续是 `editor_image_generation`，Worker 继续执行 `generate_editor_image_for_owner`。
 
+队列标题固定为“图片画布生成游戏场景”。任务摘要只展示 `generationInputs.fields` 中的“画面内容”，不得把队列 payload 里的后端完整 Prompt 暴露到任务侧栏；历史错误摘要在投影刷新时按同一规则重新派生。`assetLabel` 省略、空字符串或纯空白时统一使用“游戏场景”，不能退回完整 Prompt 作为素材名称。
+
 计费规则：
 
 - 前端展示价继续读取 `/api/editor/generation-pricing`。
diff --git a/server-rs/crates/api-server/src/app.rs b/server-rs/crates/api-server/src/app.rs
index 06a15d232..a59aa7dc9 100644
--- a/server-rs/crates/api-server/src/app.rs
+++ b/server-rs/crates/api-server/src/app.rs
@@ -1912,6 +1912,67 @@ mod tests {
         );
     }
 
+    #[tokio::test]
+    async fn editor_image_generation_rejects_scene_contract_bypasses() {
+        let state = AppState::new(AppConfig {
+            external_generation_mode: ExternalGenerationMode::Queue,
+            ..AppConfig::default()
+        })
+        .expect("state should build");
+        let seed_user = seed_phone_user_with_password(&state, "13800138232", TEST_PASSWORD).await;
+        let token = sign_test_user_token(&state, &seed_user, "sess_editor_scene_bypass");
+        let app = build_router(state);
+        let requests = [
+            (
+                "scene kind",
+                serde_json::json!({
+                    "prompt": "绕过后端场景 Prompt 组装",
+                    "kind": "scene",
+                }),
+            ),
+            (
+                "scene asset kind",
+                serde_json::json!({
+                    "prompt": "把普通图片伪装成正式场景产物",
+                    "assetKind": "scene",
+                }),
+            ),
+        ];
+
+        for (case_name, request_body) in requests {
+            let response = app
+                .clone()
+                .oneshot(
+                    Request::builder()
+                        .method("POST")
+                        .uri("/api/editor/images/generations")
+                        .header("authorization", format!("Bearer {token}"))
+                        .header("content-type", "application/json")
+                        .body(Body::from(request_body.to_string()))
+                        .expect("request should build"),
+                )
+                .await
+                .expect("request should succeed");
+
+            assert_eq!(
+                response.status(),
+                StatusCode::BAD_REQUEST,
+                "{case_name} must not bypass the dedicated scene contract"
+            );
+            let body = response
+                .into_body()
+                .collect()
+                .await
+                .expect("response body should collect")
+                .to_bytes();
+            let body_text = String::from_utf8_lossy(&body);
+            assert!(
+                body_text.contains("/api/editor/scenes/generations"),
+                "{case_name} should point callers to the scene endpoint: {body_text}"
+            );
+        }
+    }
+
     #[tokio::test]
     async fn editor_scene_generation_requires_bearer_auth() {
         let app = build_router(AppState::new(AppConfig::default()).expect("state should build"));
diff --git a/server-rs/crates/api-server/src/editor_project.rs b/server-rs/crates/api-server/src/editor_project.rs
index f3df70daa..2402faa8d 100644
--- a/server-rs/crates/api-server/src/editor_project.rs
+++ b/server-rs/crates/api-server/src/editor_project.rs
@@ -1740,6 +1740,18 @@ fn normalize_editor_scene_generation_options(
     )
 }
 
+fn editor_image_generation_request_label(kind: Option<&str>) -> &'static str {
+    if kind.is_some_and(|kind| kind.trim() == "scene") {
+        "图片画布生成游戏场景"
+    } else {
+        "图片画布生成图片"
+    }
+}
+
+fn normalize_editor_scene_asset_label(asset_label: Option<String>) -> String {
+    resolve_editor_generated_asset_label(asset_label, "游戏场景")
+}
+
 pub async fn generate_editor_scene(
     State(state): State<AppState>,
     Extension(request_context): Extension<RequestContext>,
@@ -1782,7 +1794,7 @@ pub async fn generate_editor_scene(
         asset_kind: Some("scene".to_string()),
         generation_inputs: Some(generation_inputs),
         asset_folder_id: payload.asset_folder_id,
-        asset_label: payload.asset_label.or_else(|| Some("游戏场景".to_string())),
+        asset_label: Some(normalize_editor_scene_asset_label(payload.asset_label)),
         source_resource_id: None,
         canvas_completion: payload.canvas_completion,
     };
@@ -1812,6 +1824,22 @@ pub async fn generate_editor_image(
     payload: Result<Json<EditorImageGenerationRequest>, JsonRejection>,
 ) -> Result<Json<Value>, AppError> {
     let Json(payload) = parse_editor_generation_json_payload(payload)?;
+    if payload
+        .kind
+        .as_deref()
+        .is_some_and(|kind| kind.trim() == "scene")
+        || payload
+            .asset_kind
+            .as_deref()
+            .is_some_and(|asset_kind| asset_kind.trim() == "scene")
+    {
+        return Err(
+            AppError::from_status(StatusCode::BAD_REQUEST).with_details(json!({
+                "provider": "editor-image-generation",
+                "message": "游戏场景必须通过 /api/editor/scenes/generations 提交结构化场景意图",
+            })),
+        );
+    }
     let caller = EditorGenerationCaller::from_authenticated(&authenticated);
     if !state.config.external_generation_mode.is_inline() {
         let queue_job = enqueue_editor_image_generation_for_owner(
@@ -1899,7 +1927,7 @@ pub(crate) async fn enqueue_editor_image_generation_for_owner(
         caller.owner_user_id.as_str(),
         EDITOR_IMAGE_GENERATION_JOB_KIND,
         source_entity_id,
-        "图片画布生成图片",
+        editor_image_generation_request_label(normalized_kind),
         price_mud_points,
         &payload,
         external_idempotency_key,
@@ -18299,6 +18327,14 @@ mod tests {
             editor_image_generation_billing_asset_kind(Some("scene")),
             EDITOR_SCENE_IMAGE_ASSET_KIND,
         );
+        assert_eq!(
+            editor_image_generation_request_label(Some(" scene ")),
+            "图片画布生成游戏场景",
+        );
+        assert_eq!(
+            editor_image_generation_request_label(Some("character")),
+            "图片画布生成图片",
+        );
         let profile = editor_generated_image_storage_profile(Some("scene"));
         assert_eq!(profile.asset_kind, EDITOR_SCENE_IMAGE_ASSET_KIND);
         assert_eq!(profile.path_kind, "scene-images");
@@ -18331,6 +18367,25 @@ mod tests {
         );
     }
 
+    #[test]
+    fn scene_generation_blank_asset_label_uses_product_default() {
+        assert_eq!(normalize_editor_scene_asset_label(None), "游戏场景");
+        assert_eq!(
+            normalize_editor_scene_asset_label(Some(" \t ".to_string())),
+            "游戏场景"
+        );
+        assert_eq!(
+            normalize_editor_scene_asset_label(Some(" 雨夜车站 ".to_string())),
+            "雨夜车站"
+        );
+        assert_eq!(
+            normalize_editor_scene_asset_label(Some("景".repeat(81)))
+                .chars()
+                .count(),
+            EDITOR_ASSET_LABEL_MAX_CHARS
+        );
+    }
+
     #[test]
     fn scene_generation_rebuilds_fields_and_only_keeps_reference_rows() {
         let payload: EditorSceneGenerateRequest = serde_json::from_value(json!({
diff --git a/server-rs/crates/spacetime-module/src/external_generation.rs b/server-rs/crates/spacetime-module/src/external_generation.rs
index 3052f7da3..a2951648e 100644
--- a/server-rs/crates/spacetime-module/src/external_generation.rs
+++ b/server-rs/crates/spacetime-module/src/external_generation.rs
@@ -1962,18 +1962,30 @@ fn build_external_generation_job_summary_row(
     row: &ExternalGenerationJob,
     cached_request_prompt: Option<Option<String>>,
 ) -> ExternalGenerationJobSummary {
+    let request_payload = serde_json::from_str::<serde_json::Value>(&row.request_payload_json).ok();
+    let is_scene_generation = row.source_module.trim() == EXTERNAL_GENERATION_EDITOR_SOURCE_MODULE
+        && row.job_kind.trim() == "editor_image_generation"
+        && request_payload
+            .as_ref()
+            .is_some_and(external_generation_payload_is_scene);
     ExternalGenerationJobSummary {
         job_id: row.job_id.clone(),
         job_kind: row.job_kind.clone(),
         owner_user_id: row.owner_user_id.clone(),
         source_module: row.source_module.clone(),
         source_entity_id: row.source_entity_id.clone(),
-        request_label: row.request_label.clone(),
-        request_prompt: match cached_request_prompt {
+        request_label: if is_scene_generation {
+            "图片画布生成游戏场景".to_string()
+        } else {
+            row.request_label.clone()
+        },
+        request_prompt: match cached_request_prompt.filter(|_| !is_scene_generation) {
             Some(prompt) => prompt
                 .as_deref()
                 .and_then(normalize_external_generation_request_prompt_text),
-            None => extract_external_generation_request_prompt(&row.request_payload_json),
+            None => request_payload.as_ref().and_then(|payload| {
+                extract_external_generation_request_prompt(payload, is_scene_generation)
+            }),
         },
         status: row.status.clone(),
         last_error_message: row
@@ -1994,6 +2006,13 @@ fn build_external_generation_job_summary_row(
     }
 }
 
+fn external_generation_payload_is_scene(payload: &serde_json::Value) -> bool {
+    payload
+        .get("kind")
+        .and_then(serde_json::Value::as_str)
+        .is_some_and(|kind| kind.trim() == "scene")
+}
+
 fn extract_external_generation_warning_message(
     result_payload_json: Option<&str>,
 ) -> Option<String> {
@@ -2005,8 +2024,32 @@ fn extract_external_generation_warning_message(
     normalize_external_generation_warning_message(reason)
 }
 
-fn extract_external_generation_request_prompt(request_payload_json: &str) -> Option<String> {
-    let payload: serde_json::Value = serde_json::from_str(request_payload_json).ok()?;
+fn extract_external_generation_request_prompt(
+    payload: &serde_json::Value,
+    is_scene_generation: bool,
+) -> Option<String> {
+    if is_scene_generation {
+        return payload
+            .get("generationInputs")
+            .and_then(|value| value.get("fields"))
+            .and_then(serde_json::Value::as_array)
+            .and_then(|fields| {
+                fields.iter().find_map(|field| {
+                    if field
+                        .get("title")
+                        .and_then(serde_json::Value::as_str)?
+                        .trim()
+                        != "画面内容"
+                    {
+                        return None;
+                    }
+                    field
+                        .get("value")
+                        .and_then(serde_json::Value::as_str)
+                        .and_then(normalize_external_generation_request_prompt_text)
+                })
+            });
+    }
     for key in ["prompt", "promptText", "spritesheetLabel"] {
         if let Some(prompt) = payload
             .get(key)
@@ -2753,6 +2796,7 @@ mod tests {
     #[test]
     fn pending_job_is_claimable_only_after_available_time() {
         let mut row = external_generation_job_fixture(EXTERNAL_GENERATION_STATUS_PENDING);
+        row.request_label = "图片画布生成图片".to_string();
         row.available_at = micros(1_000);
 
         assert!(!is_external_generation_job_claimable(&row, micros(999)));
@@ -3082,6 +3126,60 @@ mod tests {
         }
     }
 
+    #[test]
+    fn scene_job_summary_uses_user_scene_content_instead_of_internal_prompt() {
+        let mut row = external_generation_job_fixture(EXTERNAL_GENERATION_STATUS_PENDING);
+        row.source_module = EXTERNAL_GENERATION_EDITOR_SOURCE_MODULE.to_string();
+        row.job_kind = "editor_image_generation".to_string();
+        row.request_label = "图片画布生成图片".to_string();
+        row.request_payload_json = serde_json::json!({
+            "kind": "scene",
+            "prompt": "【内部场景规则】仅生成环境背景，禁止 UI 和文字",
+            "generationInputs": {
+                "fields": [
+                    { "title": "画面内容", "value": "雨夜中的海边车站" },
+                    { "title": "视觉风格", "value": "日系动画" }
+                ],
+                "references": []
+            }
+        })
+        .to_string();
+
+        let summary = build_external_generation_job_summary_row(&row, None);
+        let refreshed = build_external_generation_job_summary_row(
+            &row,
+            Some(Some("【内部场景规则】旧摘要缓存".to_string())),
+        );
+
+        assert_eq!(summary.request_prompt.as_deref(), Some("雨夜中的海边车站"));
+        assert_eq!(summary.request_label, "图片画布生成游戏场景");
+        assert_eq!(
+            refreshed.request_prompt.as_deref(),
+            Some("雨夜中的海边车站")
+        );
+        assert_eq!(refreshed.request_label, "图片画布生成游戏场景");
+
+        row.request_payload_json = serde_json::json!({
+            "kind": "scene",
+            "prompt": "【内部场景规则】缺少用户画面内容时也不得展示",
+            "generationInputs": { "fields": [], "references": [] }
+        })
+        .to_string();
+        let missing_scene_content = build_external_generation_job_summary_row(&row, None);
+        assert!(missing_scene_content.request_prompt.is_none());
+        assert_eq!(missing_scene_content.request_label, "图片画布生成游戏场景");
+
+        row.source_module = "puzzle".to_string();
+        row.job_kind = "puzzle_compile_draft".to_string();
+        row.request_label = "拼图场景生成".to_string();
+        let non_editor = build_external_generation_job_summary_row(&row, None);
+        assert_eq!(non_editor.request_label, "拼图场景生成");
+        assert_eq!(
+            non_editor.request_prompt.as_deref(),
+            Some("【内部场景规则】缺少用户画面内容时也不得展示")
+        );
+    }
+
     #[test]
     fn job_summary_never_copies_inline_media_as_request_prompt() {
         let mut row = external_generation_job_fixture(EXTERNAL_GENERATION_STATUS_COMPLETED);