feat(Capture): 归档后后台预生成大白话摘要,详情页秒开 + 兜底重试

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

康康/Features/Capture/UnifiedCaptureFlow.swift

@@ -311,6 +311,9 @@ struct UnifiedCaptureFlow: View {
         }
 
         try? ctx.save()
+        // 后台预生成大白话摘要:用户继续操作,详情页打开时秒开。
+        // 低优先级 —— 任何前台 AI 任务(再次拍照/问答)都会让它在下一个 token 让位。
+        Task { await ReportInsightService.shared.pregenerateIfNeeded(report: report, in: ctx) }
         onClose()
     }
 }

康康/Features/Timeline/TimelineEntryDetailView.swift

@@ -257,14 +257,7 @@ struct TimelineEntryDetailView: View {
                 }
             }
 
-            if let sum = r.summary, !sum.isEmpty {
-                card {
-                    Text(String(appLoc: "摘要"))
-                        .font(.tjScaled( 12, weight: .semibold)).foregroundStyle(Tj.Palette.text2)
-                    Text(sum).font(.tjScaled( 14)).foregroundStyle(Tj.Palette.text)
-                        .fixedSize(horizontal: false, vertical: true)
-                }
-            }
+            ReportSummaryCard(report: r)
 
             if !r.indicators.isEmpty {
                 card {
@@ -559,3 +552,52 @@ private struct EvidenceHighlightOverlay: View {
         )
     }
 }
+
+// MARK: - 报告摘要卡(无摘要时后台预生成兜底)
+
+/// 有摘要直接显示;无摘要且有指标时触发后台预生成(归档时若被抢占,这里兜底),
+/// 生成期间显示流光线,完成后 SwiftData 观察自动刷新出文本。
+private struct ReportSummaryCard: View {
+    @Environment(\.modelContext) private var ctx
+    let report: Report
+    @State private var generating = false
+
+    var body: some View {
+        Group {
+            if let sum = report.summary, !sum.isEmpty {
+                container {
+                    Text(String(appLoc: "摘要"))
+                        .font(.tjScaled( 12, weight: .semibold)).foregroundStyle(Tj.Palette.text2)
+                    Text(sum).font(.tjScaled( 14)).foregroundStyle(Tj.Palette.text)
+                        .fixedSize(horizontal: false, vertical: true)
+                }
+            } else if generating {
+                container {
+                    Text("本地 AI 正在解读这份报告…")
+                        .font(.tjScaled( 12)).foregroundStyle(Tj.Palette.text3)
+                    AIFlowBar()
+                }
+            }
+        }
+        .task {
+            guard (report.summary ?? "").isEmpty, !report.indicators.isEmpty else { return }
+            generating = true
+            await ReportInsightService.shared.pregenerateIfNeeded(report: report, in: ctx)
+            generating = false
+        }
+    }
+
+    private func container<C: View>(@ViewBuilder _ body: () -> C) -> some View {
+        VStack(alignment: .leading, spacing: 10) { body() }
+            .padding(14)
+            .frame(maxWidth: .infinity, alignment: .leading)
+            .background(
+                RoundedRectangle(cornerRadius: Tj.Radius.md, style: .continuous)
+                    .fill(Tj.Palette.paper)
+            )
+            .overlay(
+                RoundedRectangle(cornerRadius: Tj.Radius.md, style: .continuous)
+                    .strokeBorder(Tj.Palette.lineSoft, lineWidth: 1)
+            )
+    }
+}