feat: remember ai video provider per project

CHANGELOG.md

@@ -16,6 +16,12 @@
 - `Seedance 配置` 提示也会随引擎切换即时更新，表单第一眼就能看出这次走的是默认视频链，还是 `Seedance 2.0 -> 火山视频配置`。
 - 这套联动同样保留“手动改过就不再自动覆盖”的原则，避免把用户已经输入的模型名冲掉。
 
+### AI 视频开始按项目记忆最近一次视频引擎
+
+- `创建 AI 视频任务` 现在会按项目记住你最近一次使用的 `视频引擎 / 引擎模型`。
+- 如果某个项目最近一次就是用 `Seedance 2.0 + seedance-2.0-pro`，下次再打开这张表单时会优先带出这套组合，不用每次重新选。
+- 这套记忆只在当前项目内生效，不会把一个项目的视频引擎偏好串到别的项目上。
+
 ### 修复额度页套餐建议引起的全局渲染报错
 
 - `额度` 页面现在会先初始化 `packageRecommendation` 再渲染套餐建议，不再因为变量未定义把整个工作台渲染链打断。

web/storyforge-web-v4/assets/app.js

@@ -2,6 +2,7 @@ const STORAGE_KEY = "storyforge-web-v4-session";
 const SESSION_STORE = StoryForgeSessionStore.create(STORAGE_KEY);
 const DEFAULT_BACKEND_URL = StoryForgeApiClient.detectDefaultBackendUrl();
 const RECOVERY_HISTORY_KEY = STORAGE_KEY + ":recovery-history";
+const AI_VIDEO_DEFAULTS_KEY = STORAGE_KEY + ":ai-video-defaults";
 
 const navButtons = document.querySelectorAll("[data-screen-target]");
 const screens = Array.from(document.querySelectorAll("[data-screen]"));
@@ -578,6 +579,34 @@ function getCompletedJobById(jobId = "") {
     || null;
 }
 
+function getAiVideoPreferences(projectId = "") {
+  const normalizedProjectId = String(projectId || "").trim();
+  if (!normalizedProjectId) return {};
+  try {
+    const payload = JSON.parse(localStorage.getItem(AI_VIDEO_DEFAULTS_KEY) || "{}");
+    const saved = payload && typeof payload === "object" ? payload[normalizedProjectId] : null;
+    return saved && typeof saved === "object" ? saved : {};
+  } catch {
+    return {};
+  }
+}
+
+function saveAiVideoPreferences(projectId = "", values = {}) {
+  const normalizedProjectId = String(projectId || "").trim();
+  if (!normalizedProjectId) return;
+  try {
+    const payload = JSON.parse(localStorage.getItem(AI_VIDEO_DEFAULTS_KEY) || "{}");
+    const nextPayload = payload && typeof payload === "object" ? payload : {};
+    nextPayload[normalizedProjectId] = {
+      videoProvider: String(values.videoProvider || "doubao").trim() || "doubao",
+      videoModel: String(values.videoModel || "").trim()
+    };
+    localStorage.setItem(AI_VIDEO_DEFAULTS_KEY, JSON.stringify(nextPayload));
+  } catch {
+    // ignore local preference persistence failures
+  }
+}
+
 function bindCreativeSourceJobRecommendations(fields, options = {}) {
   const sourceJobSelect = fields.querySelector('[data-action-field="sourceJobId"]');
   if (!(sourceJobSelect instanceof HTMLSelectElement)) return;
@@ -12173,11 +12202,12 @@ function openCreateAiVideoAction(defaults = {}) {
   const defaultAssistantId = assistant?.id || "";
   const sourceJob = defaults.sourceJob || null;
   const defaultPlatform = normalizePlatformValue(defaults.platform || sourceJob?.platform || "douyin");
+  const persistedDefaults = getAiVideoPreferences(project.id);
   const defaultVideoProvider = String(
-    defaults.videoProvider || defaults.video_provider || sourceJob?.artifacts?.video_provider || "doubao"
+    defaults.videoProvider || defaults.video_provider || sourceJob?.artifacts?.video_provider || persistedDefaults.videoProvider || "doubao"
   ).trim() || "doubao";
   const defaultVideoModel = String(
-    defaults.videoModel || defaults.video_model || sourceJob?.artifacts?.video_model || ""
+    defaults.videoModel || defaults.video_model || sourceJob?.artifacts?.video_model || persistedDefaults.videoModel || ""
   ).trim() || (defaultVideoProvider === "seedance2" ? "seedance-2.0-pro" : "");
   openActionModal({
     title: "创建 AI 视频任务",
@@ -12282,6 +12312,10 @@ function openCreateAiVideoAction(defaults = {}) {
           video_model: values.videoModel || "",
         }
       });
+      saveAiVideoPreferences(project.id, {
+        videoProvider: values.videoProvider || "doubao",
+        videoModel: values.videoModel || ""
+      });
       rememberAction(
         "AI 视频任务已创建",
         `已创建任务 ${job.title || job.id}，引擎 ${normalizedProvider === "seedance2" ? "Seedance 2.0" : "当前默认引擎"}。`,

web/storyforge-web-v4/tests/workbench-pages.test.mjs

@@ -1126,8 +1126,13 @@ test("ai video form explains where Seedance 火山配置 lives", () => {
   assert.match(APP, /id="integration-\$\{escapeHtml\(item\.key\)\}-anchor"/);
   assert.match(APP, /function focusAutomationHealthWorkspace\(anchorId = "integration-huobao-anchor"\)/);
   assert.match(APP, /function bindAiVideoProviderRecommendations\(fields, options = \{\}\)/);
+  assert.match(APP, /const AI_VIDEO_DEFAULTS_KEY = STORAGE_KEY \+ ":ai-video-defaults"/);
+  assert.match(APP, /function getAiVideoPreferences\(projectId = ""\)/);
+  assert.match(APP, /function saveAiVideoPreferences\(projectId = "", values = \{\}\)/);
+  assert.match(APP, /const persistedDefaults = getAiVideoPreferences\(project\.id\)/);
   assert.match(APP, /modelInput\.placeholder = provider === "seedance2" \? "例如：seedance-2\.0-pro" : "留空则沿用当前默认视频模型"/);
   assert.match(APP, /bindAiVideoProviderRecommendations\(fields, \{ seedanceModel: defaultVideoModel \|\| "seedance-2\.0-pro" \}\)/);
+  assert.match(APP, /saveAiVideoPreferences\(project\.id, \{/);
   assert.match(clickActions, /name === "focus-huobao-video-config"[\s\S]*focusAutomationHealthWorkspace\("integration-huobao-anchor"\)/);
 });