diff --git a/.project-docs/30-worklog/tasks/20260818-video-duration-server-config-7b4e.md b/.project-docs/30-worklog/tasks/20260818-video-duration-server-config-7b4e.md
new file mode 100644
index 0000000..5056b58
--- /dev/null
+++ b/.project-docs/30-worklog/tasks/20260818-video-duration-server-config-7b4e.md
@@ -0,0 +1,67 @@
+# Task: Load AI Design video duration options from server
+
+## Identity
+
+- Task ID: 20260818-video-duration-server-config-7b4e
+- Mode: Feature
+- Branch: main
+- Worktree: D:\Datas\OthersProjects\makelore
+- Base commit: 86ffeac066ca03cdaacb6f12eec11dc1e258432a
+- Owner: codex
+- Status: Ready for Integration
+
+## Scope
+
+- Update the AI Design video confirmation card to use the active Quote's
+  server-provided `generationOptions.durations` for both rendering and
+  validation, removing the client-side 2–6 second range coupling.
+- Add a regression proving an enabled duration outside the former local range
+  is rendered, can be selected, re-quoted, and submitted through the existing
+  confirmation flow.
+- Do not change the API payload or provider contract; the server Quote remains
+  the authority for available and disabled durations.
+
+## Intent And Constraints
+
+- Preserve disabled options and the existing “must re-quote after changing a
+  parameter” behavior.
+- Keep legacy/invalid quotes fail-closed when no enabled server duration is
+  selected; use a server-driven validation message rather than naming a local
+  range.
+- Keep the local preview adapter unchanged; this change targets the cloud
+  Makelore adapter and the shared Quote confirmation UI.
+
+## Outcome
+
+- `ImageCanvas` now renders enabled video durations directly from the active
+  server Quote's `generationOptions.durations`.
+- Confirmation validation now accepts only a non-null duration that matches an
+  enabled server option; the previous client-side 2–6 second range check was
+  removed so future server configuration changes do not require a client
+  release.
+- The confirmation error is server-driven and no longer names a local range.
+- Added a regression using server-provided `7` and `15` second options that
+  verifies the options are shown, the initial invalid selection is blocked,
+  `15` survives re-quoting, and the final confirmation receives `15`.
+
+## Verification
+
+- Red test: the new regression initially received only `['', '2', '6']`,
+  proving the old client-side range filter was still active.
+- `pnpm exec vitest run tests/unit/image-canvas-page.test.tsx tests/unit/works-square-design-workspace.test.ts` — 79 passed.
+- `pnpm run typecheck` — passed.
+- `pnpm exec eslint src/pages/ImageCanvas/index.tsx tests/unit/image-canvas-page.test.tsx` — passed.
+- `pnpm run build:vite` — passed for Renderer, Electron Main, and Preload;
+  only existing dynamic-import and chunk-size warnings were reported.
+- `git diff --check` — passed; Git reported only the repository's LF-to-CRLF
+  checkout warnings.
+
+## Follow-ups
+
+- The server must continue publishing a valid enabled duration list in each
+  video Quote; an empty or all-disabled list intentionally keeps confirmation
+  unavailable.
+
+## Promotion Candidates
+
+- None recorded.
diff --git a/src/pages/ImageCanvas/index.tsx b/src/pages/ImageCanvas/index.tsx
index 5c9dd77..76cd49b 100644
--- a/src/pages/ImageCanvas/index.tsx
+++ b/src/pages/ImageCanvas/index.tsx
@@ -265,9 +265,6 @@ type EditableGenerationParameters = Partial<Pick<
   'resolution' | 'aspectRatio' | 'durationSeconds'
 >>;
 
-const MIN_VIDEO_DURATION_SECONDS = 2;
-const MAX_VIDEO_DURATION_SECONDS = 6;
-
 function hasSelectableVideoDuration(
   quote: DesignGenerationQuote,
   parameters: DesignGenerationParameters,
@@ -275,8 +272,6 @@ function hasSelectableVideoDuration(
   if (quote.medium !== 'video') return true;
   const durationSeconds = parameters.durationSeconds;
   return durationSeconds !== null
-    && durationSeconds >= MIN_VIDEO_DURATION_SECONDS
-    && durationSeconds <= MAX_VIDEO_DURATION_SECONDS
     && quote.generationOptions.durations.some((option) => (
       !option.disabled && option.value === durationSeconds
     ));
@@ -745,11 +740,7 @@ function QuoteCard({
   onConfirm: () => void;
 }) {
   const availableResolutions = quote.generationOptions.resolutions.filter((option) => !option.disabled);
-  const availableDurations = quote.generationOptions.durations.filter((option) => (
-    !option.disabled
-    && option.value >= MIN_VIDEO_DURATION_SECONDS
-    && option.value <= MAX_VIDEO_DURATION_SECONDS
-  ));
+  const availableDurations = quote.generationOptions.durations.filter((option) => !option.disabled);
   const availableAspectRatios = quote.generationOptions.aspectRatios.filter((option) => !option.disabled);
   const selectedDuration = availableDurations.some(
     (option) => option.value === draft.generationParameters.durationSeconds,
@@ -1210,7 +1201,7 @@ export function ImageCanvas() {
     }
     if (!quote || quote.quoteId !== quoteId
       || !hasSelectableVideoDuration(quote, draft.generationParameters)) {
-      setActionError('请选择 2 至 6 秒的视频时长，等待重新报价完成后再确认。');
+      setActionError('请选择服务端提供的视频时长，等待重新报价完成后再确认。');
       return;
     }
     const requestedWorkspaceId = workspace.workspaceId;
diff --git a/tests/unit/image-canvas-page.test.tsx b/tests/unit/image-canvas-page.test.tsx
index 086ae82..ebfd762 100644
--- a/tests/unit/image-canvas-page.test.tsx
+++ b/tests/unit/image-canvas-page.test.tsx
@@ -510,7 +510,7 @@ describe('ImageCanvas Workspace-first design experience', () => {
     expect(screen.getByRole('button', { name: '确认并开始生成' })).toBeEnabled();
   });
 
-  it('limits legacy video durations to 2-6 seconds and preserves 6 seconds through confirmation', async () => {
+  it('uses server-provided video durations and preserves the selected value through confirmation', async () => {
     const videoConversation = conversationFixture();
     const videoQuote = videoConversation.messages[1].generationQuote!;
     videoConversation.brief.medium = 'video';
@@ -543,7 +543,7 @@ describe('ImageCanvas Workspace-first design experience', () => {
     const durationSelect = await screen.findByTestId('design-quote-duration');
     expect(durationSelect).toHaveValue('');
     expect(within(durationSelect).getAllByRole('option').map((option) => option.getAttribute('value')))
-      .toEqual(['', '2', '6']);
+      .toEqual(['', '2', '6', '7', '15']);
     expect(screen.getByRole('button', { name: '确认并开始生成' })).toBeDisabled();
 
     fireEvent.change(screen.getByLabelText('设计需求'), {
@@ -552,9 +552,9 @@ describe('ImageCanvas Workspace-first design experience', () => {
     fireEvent.click(screen.getByRole('button', { name: '发送给设计 Agent' }));
 
     expect(confirmImageWorkspaceGenerationMock).not.toHaveBeenCalled();
-    expect(await screen.findByRole('alert')).toHaveTextContent('请选择 2 至 6 秒的视频时长');
+    expect(await screen.findByRole('alert')).toHaveTextContent('请选择服务端提供的视频时长');
 
-    fireEvent.change(durationSelect, { target: { value: '6' } });
+    fireEvent.change(durationSelect, { target: { value: '15' } });
 
     await waitFor(() => expect(updateImageWorkspaceGenerationQuoteMock).toHaveBeenCalledWith(
       'workspace-cloud',
@@ -562,10 +562,10 @@ describe('ImageCanvas Workspace-first design experience', () => {
       videoQuote.finalPrompt,
       {
         ...videoQuote.generationParameters,
-        durationSeconds: 6,
+        durationSeconds: 15,
       },
     ));
-    await waitFor(() => expect(screen.getByTestId('design-quote-duration')).toHaveValue('6'));
+    await waitFor(() => expect(screen.getByTestId('design-quote-duration')).toHaveValue('15'));
     fireEvent.click(screen.getByRole('button', { name: '确认并开始生成' }));
 
     await waitFor(() => expect(confirmImageWorkspaceGenerationMock).toHaveBeenCalledWith(
@@ -577,7 +577,7 @@ describe('ImageCanvas Workspace-first design experience', () => {
       videoQuote.finalPrompt,
       {
         ...videoQuote.generationParameters,
-        durationSeconds: 6,
+        durationSeconds: 15,
       },
     ));
   });