feat: 添加 Pipeline Progress API 支持

新增功能:
1. Pipeline Phases 配置
   - loadPipelinePhases() 函数
   - 调用 GET /api/v1/pipeline/phases
   - 缓存配置（静态，不常变化）

2. File Progress API
   - loadFileProgress() 函数
   - 调用 GET /api/v1/file/{uuid}/progress
   - 返回详细的阶段和处理器进度

3. 类型定义
   - PipelinePhasesConfig
   - FileProgressDetail
   - PhaseProgressDetail
   - ProcessorProgressDetail

4. loadPipelineStats() 增强
   - 优先使用新的 progress API
   - 自动降级到旧 API
   - 支持阶段进度计算

API Endpoints:
GET /api/v1/pipeline/phases
GET /api/v1/file/{uuid}/progress

返回格式:
{
  "file_uuid": "...",
  "overall_progress": 0.75,
  "current_phase": "tkg_nodes",
  "phases": {
    "processors": {
      "status": "completed",
      "progress": 1.0,
      "processors": {...}
    }
  }
}

用途:
- LibraryView 显示文件处理进度
- 实时更新 Pipeline 状态
- 支持阶段级进度显示

状态: ✅ 编译通过

src/store.ts

@@ -84,9 +84,50 @@ export interface PipelineStage {
 
 export interface PipelineStats {
   overall_progress: number
+  current_phase?: string | null
   stages: PipelineStage[]
 }
 
+// Pipeline Phases 配置
+export interface PhaseProcessor {
+  name: string
+  weight: number
+  depends_on?: string[]
+}
+
+export interface PipelinePhase {
+  name: string
+  weight: number
+  processors: PhaseProcessor[]
+}
+
+export interface PipelinePhasesConfig {
+  phases: PipelinePhase[]
+}
+
+// Pipeline Progress API (new)
+export interface ProcessorProgressDetail {
+  name: string
+  status: 'pending' | 'running' | 'completed' | 'failed'
+  progress: number
+  message?: string
+}
+
+export interface PhaseProgressDetail {
+  status: string
+  progress: number
+  processors: Record<string, ProcessorProgressDetail>
+}
+
+export interface FileProgressDetail {
+  file_uuid: string
+  overall_progress: number
+  current_phase: string | null
+  phases: Record<string, PhaseProgressDetail>
+}
+
+export const pipelinePhasesCache = ref<PipelinePhasesConfig | null>(null)
+
 export interface SystemStats {
   cpu_used_percent: number
   memory_used_percent: number
@@ -991,6 +1032,43 @@ export async function syncAllProcessingFiles(): Promise<void> {
   }
 }
 
+export async function loadPipelinePhases(force = false): Promise<PipelinePhasesConfig | null> {
+  if (!force && pipelinePhasesCache.value) return pipelinePhasesCache.value
+  
+  try {
+    const resp = await fetch('/api/v1/pipeline/phases')
+    if (!resp.ok) {
+      console.warn('Pipeline phases API failed:', resp.status)
+      return null
+    }
+    
+    const data: PipelinePhasesConfig = await resp.json()
+    pipelinePhasesCache.value = data
+    return data
+  } catch (e) {
+    console.error('loadPipelinePhases failed:', e)
+    return null
+  }
+}
+
+export async function loadFileProgress(fileUuid: string): Promise<FileProgressDetail | null> {
+  if (!fileUuid) return null
+  
+  try {
+    const resp = await fetch(`/api/v1/file/${fileUuid}/progress`)
+    if (!resp.ok) {
+      console.warn('File progress API failed:', resp.status)
+      return null
+    }
+    
+    const data: FileProgressDetail = await resp.json()
+    return data
+  } catch (e) {
+    console.error('loadFileProgress failed:', e)
+    return null
+  }
+}
+
 export async function loadPipelineStats(fileUuid: string, force = false): Promise<PipelineStats | null> {
   if (!fileUuid) return null
   if (!force && pipelineStatsCache.value[fileUuid]) return pipelineStatsCache.value[fileUuid]
@@ -998,6 +1076,38 @@ export async function loadPipelineStats(fileUuid: string, force = false): Promis
   
   loadingPipelineStats.add(fileUuid)
   try {
+    // Try new progress API first
+    const progressData = await loadFileProgress(fileUuid)
+    if (progressData && progressData.overall_progress !== undefined) {
+      const stages: PipelineStage[] = []
+      
+      // Convert phases to stages
+      if (progressData.phases) {
+        const phasesConfig = await loadPipelinePhases()
+        const phaseWeights = phasesConfig?.phases || []
+        
+        for (const [phaseName, phaseData] of Object.entries(progressData.phases)) {
+          const config = phaseWeights.find(p => p.name === phaseName)
+          stages.push({
+            name: phaseName,
+            weight: config?.weight || 0.1,
+            progress: phaseData.progress || 0,
+            status: phaseData.status as any || 'pending'
+          })
+        }
+      }
+      
+      const pipelineStats: PipelineStats = {
+        overall_progress: progressData.overall_progress,
+        current_phase: progressData.current_phase,
+        stages
+      }
+      
+      pipelineStatsCache.value = { ...pipelineStatsCache.value, [fileUuid]: pipelineStats }
+      return pipelineStats
+    }
+    
+    // Fallback to old API
     const data: any = await apiCall('get_pipeline_stats', { fileUuid })
     
     const stages = data.stages || []