feat: add Seedance 2.0 models

tests/unit/billing/cost.test.ts

@@ -5,6 +5,7 @@ import {
   calcLipSync,
   calcText,
   calcVideo,
+  calcVideoByTokens,
   calcVoice,
   calcVoiceDesign,
 } from '@/lib/billing/cost'
@@ -87,6 +88,37 @@ describe('billing/cost', () => {
     })).toThrow('Unsupported video capability pricing')
   })
 
+  it('estimates Seedance 2.0 video pricing from official token formula', () => {
+    const cost = calcVideo('doubao-seedance-2-0-260128', '720p', 1, {
+      resolution: '720p',
+      duration: 5,
+      aspectRatio: '16:9',
+      containsVideoInput: false,
+    })
+
+    expect(cost).toBeCloseTo(4.968, 8)
+  })
+
+  it('applies Seedance 2.0 video-input token floor for quoted pricing', () => {
+    const cost = calcVideo('doubao-seedance-2-0-fast-260128', '720p', 1, {
+      resolution: '720p',
+      duration: 5,
+      aspectRatio: '16:9',
+      containsVideoInput: true,
+      inputVideoSeconds: 2,
+    })
+
+    expect(cost).toBeCloseTo(4.2768, 8)
+  })
+
+  it('settles Seedance 2.0 videos from exact usage tokens', () => {
+    const cost = calcVideoByTokens('doubao-seedance-2-0-260128', 120_000, {
+      containsVideoInput: false,
+    })
+
+    expect(cost).toBeCloseTo(5.52, 8)
+  })
+
   it('supports minimax capability-aware video pricing', () => {
     const hailuoNormal = calcVideo('minimax-hailuo-2.3', '768p', 1, {
       generationMode: 'normal',

tests/unit/billing/service.test.ts

@@ -1,5 +1,5 @@
 import { beforeEach, describe, expect, it, vi } from 'vitest'
-import { calcText, calcVoice } from '@/lib/billing/cost'
+import { calcText, calcVideo, calcVoice } from '@/lib/billing/cost'
 import type { TaskBillingInfo } from '@/lib/task/types'
 
 const ledgerMock = vi.hoisted(() => ({
@@ -230,6 +230,34 @@ describe('billing/service', () => {
       }
     }
 
+    function buildSeedance2VideoTaskInfo(
+      overrides: Partial<Extract<TaskBillingInfo, { billable: true }>> = {},
+    ): Extract<TaskBillingInfo, { billable: true }> {
+      return {
+        billable: true,
+        source: 'task',
+        taskType: 'video_panel',
+        apiType: 'video',
+        model: 'doubao-seedance-2-0-260128',
+        quantity: 1,
+        unit: 'video',
+        maxFrozenCost: calcVideo('doubao-seedance-2-0-260128', '720p', 1, {
+          resolution: '720p',
+          duration: 5,
+          aspectRatio: '16:9',
+          containsVideoInput: false,
+        }),
+        action: 'video_panel_generate',
+        metadata: {
+          resolution: '720p',
+          duration: 5,
+          aspectRatio: '16:9',
+          containsVideoInput: false,
+        },
+        ...overrides,
+      }
+    }
+
     it('prepareTaskBilling handles OFF/SHADOW/ENFORCE paths', async () => {
       modeMock.getBillingMode.mockResolvedValueOnce('OFF')
       const off = await prepareTaskBilling({
@@ -468,6 +496,25 @@ describe('billing/service', () => {
       expect((settled as Extract<TaskBillingInfo, { billable: true }>).chargedCost).toBeCloseTo(calcVoice(50), 8)
     })
 
+    it('settleTaskBilling charges Seedance 2.0 videos from exact usage tokens', async () => {
+      ledgerMock.confirmChargeWithRecord.mockResolvedValueOnce(true)
+
+      const settled = await settleTaskBilling({
+        id: 'task_seedance2_actual_tokens',
+        userId: 'u1',
+        projectId: 'p1',
+        billingInfo: buildSeedance2VideoTaskInfo({
+          modeSnapshot: 'ENFORCE',
+          freezeId: 'freeze_seedance2_actual_tokens',
+        }),
+      }, {
+        result: { actualVideoTokens: 120_000 },
+      })
+
+      expect(ledgerMock.increasePendingFreezeAmount).toHaveBeenCalledTimes(1)
+      expect((settled as Extract<TaskBillingInfo, { billable: true }>).chargedCost).toBeCloseTo(5.52, 8)
+    })
+
     it('settleTaskBilling keeps quoted charge when text usage has no token counts', async () => {
       const quoted = calcText('anthropic/claude-sonnet-4', 500, 500)
       const textBillingInfo: Extract<TaskBillingInfo, { billable: true }> = {