feat(leonardo): 接入视频通道并新增 seedance-2.0/minimax-h3 模型

frontend/src/components/ImportModal.vue

@@ -105,7 +105,7 @@ async function doSmartImport() {
           <strong class="text-slate-700">Cookie 数组</strong>(多 Adobe 批量)、
           <strong class="text-slate-700">ChatGPT JWT</strong>(<code class="px-1 bg-slate-100 rounded">eyJhbGciOi...</code>)、
           <strong class="text-slate-700">Runway JWT</strong>(自动与 ChatGPT 区分)、
-          <strong class="text-slate-700">Leonardo Cookie</strong>(含 better-auth)、
+          <strong class="text-slate-700">Leonardo Cookie</strong>(须含 better-auth.session_data)、
           <strong class="text-slate-700">Krea Cookie</strong>(含 sb-superb-auth)、
           <strong class="text-slate-700">Imagine Token</strong>(<code class="px-1 bg-slate-100 rounded">{"token","refreshToken","email","parentId"}</code>)、
           <strong class="text-slate-700">Grok SSO</strong>(grok.com 的 <code class="px-1 bg-slate-100 rounded">sso</code> 值,仅含 session_id,自动与 ChatGPT/Runway 区分)、

frontend/src/components/ModelFormModal.vue

@@ -40,9 +40,10 @@ const isVideo = computed(() => entry.value?.type === 'video')
 // Display tiers in canonical ascending order (720p before 1080p; 1K<2K<4K)
 // regardless of how the catalog/stored record happens to list them.
 const resolutions = computed(() => sortResolutions(entry.value?.resolutions || []))
+// 按秒计价的视频模型（一个 /s 价，实付 = 分辨率价 + 每秒价 × 秒数）。
 const isPerSecond = computed(() => {
   const id = entry.value?.id || ''
-  return id.startsWith('seedance')
+  return id.startsWith('seedance') || id === 'grok-video'
 })
 
 const durationTiers = computed(() => {