feat: 扫描报告页+手动选波长护理+光疗功效介绍页+诊断框架(占位阈值)

- services/diagnosis.js: 诊断流水线框架,阈值/PD映射为占位待标定,支持单波长降级
- auto-scan: 扫描完成改为出报告让用户选择护理(替代原自动开始治疗)
- 新增 scan-report/manual-treatment/light-info 三页,全部接入 i18n
- api.js: 新增 report/diagnosis-config 接口(对接后端契约)

miniprogram/pages/auto-scan/auto-scan.js

@@ -1,4 +1,6 @@
 var ble = require('../../services/ble')
+var api = require('../../utils/api')
+var diagnosis = require('../../services/diagnosis')
 var SCAN_TIMEOUT = 180000
 
 Page({
@@ -158,39 +160,49 @@ Page({
     getApp().globalData.lastScanPdAvg = avg
     console.log('[SCAN] PD平均值:', avg, '帧数:', count)
 
-    this._startTreatment()
+    this._buildAndGoReport(avg)
   },
 
-  _startTreatment: function () {
+  // Scan finished -> run the (placeholder) diagnosis, store + persist a report, and
+  // navigate to the report page so the user sees their skin tendencies and chooses
+  // care. This replaces the previous auto-start-treatment behavior.
+  //
+  // NOTE: today only single-wavelength red PD is collected, and the thresholds +
+  // PD->region mapping in services/diagnosis.js are placeholders pending calibration.
+  // Report + persistence work end to end regardless; the numbers get real after
+  // 4-wavelength scan collection and calibration land.
+  _buildAndGoReport: function (avg) {
     var self = this
+    var app = getApp()
     var mask = self.data.regions || 0x1F
-    var avg = self.data.pdAvg
-    var params = self._calculateTreatParams(mask, avg)
+    var deviceId = (app.globalData.connectedDevice && app.globalData.connectedDevice.device_id) || null
+    var scannedAt = Date.now()
 
-    console.log('[SCAN] 自动发送治疗命令:', JSON.stringify(params))
-    ble.setParams(params).then(function () {
-      return ble.startTreatment(mask)
-    }).then(function () {
-      wx.redirectTo({
-        url: '/pages/treating/treating?regions=' + mask +
-          '&wavelength=2&duration=600000&mode=1'
-      })
-    }).catch(function (err) {
-      self.setData({ error: err.error_msg || '启动治疗失败' })
-    })
-  },
+    function proceed(config) {
+      var scanData = diagnosis.fromRedScan(avg, mask, deviceId, scannedAt)
+      var report = diagnosis.analyze(scanData, config || diagnosis.DEFAULT_CONFIG)
+      app.globalData.lastScanReport = report
 
-  _calculateTreatParams: function (mask, pdAvg) {
-    // TODO: 接入完整诊断算法（NR 归一化吸收率 → 匹配光谱+强度）
-    // 需要 PD→区域映射确认后实现
-    return {
-      region_mask: mask,
-      wavelength: 2,
-      brightness: 200,
-      duration_ms: 600000,
-      mode: 1,
-      control: 0x02
+      // Best-effort persist (also seeds the calibration dataset via raw_pd); never blocks navigation.
+      api.saveReport({
+        device_id: report.device_id,
+        scanned_at: report.scanned_at,
+        regions: report.regions,
+        overall: report.overall,
+        recommend_mask: report.recommend_mask,
+        recommend_plan: report.recommend_plan,
+        raw_pd: report.raw_pd,
+        calibrated: report.calibrated
+      }).catch(function () {})
+
+      wx.redirectTo({ url: '/pages/scan-report/scan-report' })
     }
+
+    api.getDiagnosisConfig().then(function (cfg) {
+      proceed(cfg && cfg.levels ? cfg : diagnosis.DEFAULT_CONFIG)
+    }).catch(function () {
+      proceed(diagnosis.DEFAULT_CONFIG)
+    })
   },
 
   onUnload: function () {