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/Services/ReportInsightService.swift

@@ -0,0 +1,61 @@
+import Foundation
+import SwiftData
+
+/// 报告大白话摘要预生成(§3.1:流程经本服务碰 AIRuntime,UI 不直接调)。
+/// 时机:归档保存后立即后台跑(用户继续操作时完成);详情页打开时兜底重试。
+/// 写回策略:只在 summary 为空时生成 —— 绝不覆盖 VL 已给出或用户编辑过的摘要。
+@MainActor
+final class ReportInsightService {
+    static let shared = ReportInsightService()
+    private init() {}
+
+    /// 进行中的报告 ID,防止「保存后台任务」与「详情页兜底」重复触发。
+    private var inFlight: Set<String> = []
+
+    func pregenerateIfNeeded(report: Report, in ctx: ModelContext) async {
+        guard (report.summary ?? "").isEmpty, !report.indicators.isEmpty else { return }
+        let key = String(describing: report.persistentModelID)
+        guard !inFlight.contains(key) else { return }
+        inFlight.insert(key)
+        defer { inFlight.remove(key) }
+
+        do {
+            try await AIRuntime.shared.prepare()
+        } catch {
+            return   // 模型未就绪:静默放弃,详情页下次打开再试
+        }
+
+        let prompt = InsightPrompts.reportPlainSummary(
+            title: report.title,
+            typeLabel: report.type.label,
+            indicatorLines: Self.indicatorLines(for: report.indicators)
+        )
+        var collected = ""
+        do {
+            let stream = await AIRuntime.shared.generate(
+                prompt: prompt, maxTokens: 200, priority: .background)
+            for try await chunk in stream { collected += chunk.text }
+        } catch {
+            return   // 被前台任务抢占(CancellationError)或推理失败:放弃,兜底路径再试
+        }
+        let text = HealthExportService.stripThinkBlocks(collected)
+            .trimmingCharacters(in: .whitespacesAndNewlines)
+        guard !text.isEmpty, (report.summary ?? "").isEmpty else { return }
+        report.summary = text
+        try? ctx.save()
+    }
+
+    /// 「名 值 单位(参考 range)status」每指标一行;异常项排前,上限 15 行控 prompt 体积。
+    static func indicatorLines(for indicators: [Indicator]) -> String {
+        let sorted = indicators.sorted {
+            ($0.status == .normal ? 1 : 0) < ($1.status == .normal ? 1 : 0)
+        }
+        return sorted.prefix(15).map { i in
+            var line = "\(i.name) \(i.value)"
+            if !i.unit.isEmpty { line += " \(i.unit)" }
+            if !i.range.isEmpty { line += "(参考 \(i.range))" }
+            line += " \(i.status.rawValue)"
+            return line
+        }.joined(separator: "\n")
+    }
+}