Fix map detail panel: update weights, add PWAT, show duct info

- Update all 9 hardcoded weights to match recalibrated values
- Add missing PWAT factor (11.3% weight) to FACTOR_META and FACTOR_ORDER
- Reorder factors by weight (highest first)
- Fix pressure explanation (low pressure is better, not rising)
- Add PWAT factor explanation (beneficial vs harmful by band)
- Show duct info panel when native data detects ducting layers
  (count, thickness, minimum trapped frequency)

assets/js/propagation_map_hook.js

@@ -1,21 +1,24 @@
 import topbar from "../vendor/topbar"
 import { updateGridOverlay } from "./maidenhead_grid"
 
+// Weights must match BandConfig.weights() in band_config.ex
+// Recalibrated 2026-04-11 via gradient descent (loss 0.42 → 0.12)
 const FACTOR_META = {
-  humidity:      { label: "Humidity",       weight: 0.20, unit: "g/m\u00b3" },
+  rain:          { label: "Rain",           weight: 0.1362, unit: "" },
-  time_of_day:   { label: "Time of Day",    weight: 0.20, unit: "" },
+  humidity:      { label: "Humidity",       weight: 0.1243, unit: "g/m\u00b3" },
-  td_depression: { label: "Td Depression",  weight: 0.12, unit: "\u00b0F" },
+  pwat:          { label: "PWAT",           weight: 0.1128, unit: "mm" },
-  refractivity:  { label: "Refractivity",   weight: 0.10, unit: "N/km" },
+  season:        { label: "Season",         weight: 0.1112, unit: "" },
-  sky:           { label: "Sky Cover",      weight: 0.10, unit: "%" },
+  refractivity:  { label: "Refractivity",   weight: 0.1049, unit: "N/km" },
-  season:        { label: "Season",         weight: 0.10, unit: "" },
+  pressure:      { label: "Pressure",       weight: 0.1032, unit: "mb" },
-  rain:          { label: "Rain",           weight: 0.08, unit: "" },
+  td_depression: { label: "Td Depression",  weight: 0.0978, unit: "\u00b0F" },
-  wind:          { label: "Wind",           weight: 0.06, unit: "kts" },
+  sky:           { label: "Sky Cover",      weight: 0.08,   unit: "%" },
-  pressure:      { label: "Pressure",       weight: 0.04, unit: "mb" }
+  wind:          { label: "Wind",           weight: 0.08,   unit: "kts" },
+  time_of_day:   { label: "Time of Day",    weight: 0.0496, unit: "" }
 }
 
 const FACTOR_ORDER = [
-  "humidity", "time_of_day", "td_depression", "refractivity",
+  "rain", "humidity", "pwat", "season", "refractivity",
-  "sky", "season", "rain", "wind", "pressure"
+  "pressure", "td_depression", "sky", "wind", "time_of_day"
 ]
 
 function scoreTier(score) {
@@ -90,10 +93,20 @@ function factorExplanation(key, score, detail) {
       if (score >= 90) return "No rain — no path attenuation"
       if (score >= 50) return "Light rain — minor attenuation"
       return "Heavy rain — significant path loss"
+    case "pwat":
+      if (beneficial) {
+        if (score >= 80) return "High column moisture — strong refractivity"
+        if (score >= 50) return "Moderate PWAT — some refractivity enhancement"
+        return "Low PWAT — limited moisture for ducting"
+      } else {
+        if (score >= 80) return "Low column moisture — minimal absorption"
+        if (score >= 50) return "Moderate PWAT"
+        return "High PWAT — significant absorption at this frequency"
+      }
     case "pressure":
-      if (score >= 70) return "Rising pressure — increasing stability favors inversions"
+      if (score >= 70) return "Low pressure — frontal boundaries favor ducting"
-      if (score >= 55) return "Steady pressure — stable conditions"
+      if (score >= 45) return "Normal pressure — average conditions"
-      return "Falling pressure — instability weakens inversions"
+      return "High pressure — stable ridge, inversions cap at wrong altitude"
     default:
       return ""
   }
@@ -344,11 +357,26 @@ function buildPopupHTML(detail, viewshedLoading) {
       <div style="font-size:10px;font-weight:700;opacity:0.5;margin-bottom:4px;text-transform:uppercase;letter-spacing:0.5px;">Analysis</div>
       ${explanations}
     </div>
+    ${detail.factors.duct_info ? buildDuctInfoHTML(detail.factors.duct_info) : ""}
     ${detail.forecast ? buildForecastSvg(detail.forecast) : ""}
     ${viewshedStatus}
   </div>`
 }
 
+function buildDuctInfoHTML(duct) {
+  const freq = duct.best_duct_freq_ghz != null ? `${duct.best_duct_freq_ghz.toFixed(1)} GHz` : "—"
+  const thick = duct.max_duct_thickness_m != null ? `${Math.round(duct.max_duct_thickness_m)} m` : "—"
+  return `
+    <div style="padding:4px 10px 6px;border-top:1px solid rgba(255,255,255,0.15);">
+      <div style="font-size:10px;font-weight:700;opacity:0.5;margin-bottom:3px;text-transform:uppercase;letter-spacing:0.5px;">Ducting</div>
+      <div style="font-size:12px;display:flex;gap:12px;">
+        <span><strong>${duct.duct_count}</strong> layer${duct.duct_count !== 1 ? "s" : ""}</span>
+        <span>Thickness: <strong>${thick}</strong></span>
+        <span>Traps \u2265 <strong>${freq}</strong></span>
+      </div>
+    </div>`
+}
+
 // --- Hook ---
 
 export const PropagationMap = {