src/trx-client/trx-frontend/trx-frontend-http/assets/web/generated/app.js

@@ -5889,6 +5889,7 @@ function navigateToTab(name, options = {}) {
   if (leavingSatellites) window.clearSatPredictionDom?.();
   void loadPluginsForTab(name).then(() => {
     if (name === "satellites") window.refreshSatPredictions?.();
+    flushPendingDecodeStats();
   }).catch((error) => {
     console.error(error);
   });
@@ -7619,11 +7620,35 @@ var IMAGE_DECODE_KINDS = /* @__PURE__ */ new Set([
   "sstv",
   "sstv_progress"
 ]);
+var pendingDecodeStats = [];
+var PENDING_DECODE_STATS_MAX = 5e4;
+function recordDecodeStat(kind, rig, tsMs) {
+  const stats = window.trx.modules.map;
+  if (stats) {
+    stats.statsRecordDecode(kind, rig, tsMs);
+    return;
+  }
+  pendingDecodeStats.push({ kind, rig, tsMs });
+  if (pendingDecodeStats.length > PENDING_DECODE_STATS_MAX) {
+    pendingDecodeStats.splice(0, pendingDecodeStats.length - PENDING_DECODE_STATS_MAX);
+  }
+}
+function flushPendingDecodeStats() {
+  const stats = window.trx.modules.map;
+  if (!stats || pendingDecodeStats.length === 0) return;
+  for (const entry of pendingDecodeStats.splice(0)) {
+    stats.statsRecordDecode(entry.kind, entry.rig, entry.tsMs);
+  }
+  stats.scheduleStatsRender();
+}
+function scheduleStatsRenderIfLoaded() {
+  window.trx.modules.map?.scheduleStatsRender();
+}
 function dispatchDecodeMessage(msg, skipStats = false) {
   if (msg.type) window.trxPluginRuntime.dispatch(msg.type, msg);
   if (!skipStats && msg.type && !IMAGE_DECODE_KINDS.has(msg.type)) {
-    window.trx.modules.map?.statsRecordDecode(msg.type, msg.rig_id || msg.remote || null);
-    window.trx.modules.map?.scheduleStatsRender();
+    recordDecodeStat(msg.type, msg.rig_id || msg.remote || null);
+    scheduleStatsRenderIfLoaded();
   }
 }
 var DECODE_HISTORY_WORKER_GROUP_LIMIT = 512;
@@ -7669,9 +7694,9 @@ function restoreDecodeHistoryGroup(kind, messages) {
   if (!Array.isArray(messages) || messages.length === 0) return;
   if (!IMAGE_DECODE_KINDS.has(kind)) {
     for (const msg of messages) {
-      window.trx.modules.map?.statsRecordDecode(kind, msg.rig_id || msg.remote || null, msg.ts_ms || void 0);
+      recordDecodeStat(kind, msg.rig_id || msg.remote || null, msg.ts_ms || void 0);
     }
-    window.trx.modules.map?.scheduleStatsRender();
+    scheduleStatsRenderIfLoaded();
   }
   window.trxPluginRuntime.restore(kind, messages);
 }

src/trx-client/trx-frontend/trx-frontend-http/assets/web/generated/chunk-PJ5Q7CWJ.js

@@ -168,19 +168,22 @@ function initializeFtxDecoder(config) {
     }
     messagesElement.replaceChildren(fragment);
   };
-  const normalize = (message) => {
+  const plotLocator = (message) => {
     const raw = message.message ?? "";
     const locatorDetails = bridge.ft8ExtractLocatorDetails?.(raw) ?? extractFtxLocatorDetails(raw);
     const grids = locatorDetails.length > 0 ? locatorDetails.map(({ grid }) => grid) : bridge.ft8ExtractAllGrids?.(raw) ?? extractFtxGrids(raw);
+    if (grids.length === 0) return;
     const station = bridge.ft8ExtractLikelyCallsign?.(raw) ?? extractFtxCallsign(raw);
     const frequency = displayFrequency(message.freq_hz);
-    if (grids.length > 0) {
-      bridge.mapAddLocator?.(raw, grids, id, station, {
-        ...message,
-        freq_hz: frequency ?? message.freq_hz,
-        locator_details: locatorDetails
-      });
-    }
+    bridge.mapAddLocator?.(raw, grids, id, station, {
+      ...message,
+      freq_hz: frequency ?? message.freq_hz,
+      locator_details: locatorDetails
+    });
+  };
+  const normalize = (message) => {
+    const frequency = displayFrequency(message.freq_hz);
+    plotLocator(message);
     return {
       // The rig that heard it, kept so the mini view can tell a decode of the
       // rig on screen from one a background rig made on another band.
@@ -240,6 +243,10 @@ function initializeFtxDecoder(config) {
     rerender: () => {
       bridge.updateFt8Bar?.();
       render();
+    },
+    // Oldest first, so the map builds the grids up in the order they were heard.
+    syncMap: () => {
+      for (const message of [...history].reverse()) plotLocator(message);
     }
   });
   bridge.registerFt8FamilyBarRenderer?.(id, barFrames);

src/trx-client/trx-frontend/trx-frontend-http/assets/web/generated/ft2.js

@@ -1,6 +1,6 @@
 import {
   initializeFtxDecoder
-} from "./chunk-PAKFJPA2.js";
+} from "./chunk-PJ5Q7CWJ.js";
 import "./chunk-S57W63QN.js";
 import "./chunk-KL66PICH.js";
 

src/trx-client/trx-frontend/trx-frontend-http/assets/web/generated/ft4.js

@@ -1,6 +1,6 @@
 import {
   initializeFtxDecoder
-} from "./chunk-PAKFJPA2.js";
+} from "./chunk-PJ5Q7CWJ.js";
 import "./chunk-S57W63QN.js";
 import "./chunk-KL66PICH.js";
 

src/trx-client/trx-frontend/trx-frontend-http/assets/web/generated/ft8.js

@@ -2,7 +2,7 @@ import {
   initializeFt8FamilyBar,
   initializeFtxDecoder,
   installFtxCompatibilityHelpers
-} from "./chunk-PAKFJPA2.js";
+} from "./chunk-PJ5Q7CWJ.js";
 import "./chunk-S57W63QN.js";
 import "./chunk-KL66PICH.js";
 

src/trx-client/trx-frontend/trx-frontend-http/assets/web/generated/wspr.js

@@ -95,6 +95,7 @@ function normalizeServerWsprMessage(msg) {
     rfHz,
     history: {
       rig_id: msg.rig_id ?? null,
+      _rfHz: rfHz,
       receiver: wsprWindow.getDecodeRigMeta ? wsprWindow.getDecodeRigMeta() : null,
       ts_ms: msg.ts_ms,
       snr_db: msg.snr_db,
@@ -110,12 +111,7 @@ function onServerWsprBatch(messages) {
   for (const msg of messages) {
     const next = normalizeServerWsprMessage(msg);
     if (wsprStatus && isActiveRigDecode(msg.rig_id)) wsprStatus.textContent = "Receiving";
-    if (next.grids.length > 0 && wsprWindow.mapAddLocator) {
-      wsprWindow.mapAddLocator(next.raw, next.grids, "wspr", next.station, {
-        ...msg,
-        ...next.rfHz === null ? {} : { freq_hz: next.rfHz }
-      });
-    }
+    plotWsprLocator(msg);
     next.history._tsMs = Number.isFinite(next.history.ts_ms) ? Number(next.history.ts_ms) : Date.now();
     normalized.push(next.history);
   }
@@ -255,15 +251,19 @@ document.getElementById("settings-clear-wspr-history")?.addEventListener("click"
     }
   })();
 });
+function plotWsprLocator(msg) {
+  const next = normalizeServerWsprMessage(msg);
+  if (next.grids.length === 0 || !wsprWindow.mapAddLocator) return;
+  const rfHz = finiteNumber(msg._rfHz) ?? next.rfHz;
+  wsprWindow.mapAddLocator(next.raw, next.grids, "wspr", next.station, {
+    ...msg,
+    ...rfHz === null ? {} : { freq_hz: rfHz }
+  });
+}
 function onServerWspr(msg) {
   if (wsprStatus && isActiveRigDecode(msg.rig_id)) wsprStatus.textContent = "Receiving";
   const next = normalizeServerWsprMessage(msg);
-  if (next.grids.length > 0 && wsprWindow.mapAddLocator) {
-    wsprWindow.mapAddLocator(next.raw, next.grids, "wspr", next.station, {
-      ...msg,
-      ...next.rfHz === null ? {} : { freq_hz: next.rfHz }
-    });
-  }
+  plotWsprLocator(msg);
   addWsprMessage(next.history);
 }
 wsprWindow.trxPluginRuntime.registerDecoder({
@@ -273,5 +273,9 @@ wsprWindow.trxPluginRuntime.registerDecoder({
   restore: onServerWsprBatch,
   prune: pruneWsprHistoryView,
   reset: resetWsprHistoryView,
-  rerender: renderWsprHistory
+  rerender: renderWsprHistory,
+  // Oldest first, so the map builds the grids up in the order they were heard.
+  syncMap: () => {
+    for (const message of [...wsprMessageHistory].reverse()) plotWsprLocator(message);
+  }
 });

src/trx-client/trx-frontend/trx-frontend-http/frontend/src/app.ts

@@ -4912,6 +4912,8 @@ function navigateToTab(name: TabName, options: { updateHistory?: boolean; replac
     // Passes go stale while the page is closed, so each visit reloads them.
     // The first visit is what imports the module, which renders on its own.
     if (name === "satellites") window.refreshSatPredictions?.();
+    // The map module owns the decode log; this is the moment it can exist.
+    flushPendingDecodeStats();
   }).catch((error: unknown) => { console.error(error); });
   if (name === "map") {
     _initMapWhenReady();
@@ -6597,11 +6599,49 @@ const IMAGE_DECODE_KINDS = new Set([
   "lrpt_image", "lrpt_progress", "wefax", "wefax_progress", "sstv", "sstv_progress",
 ]);
 
+// The decode log the Statistics page counts lives in the map module, which is
+// lazy: it arrives when the Map or Statistics tab is first opened, long after
+// the history replayed and the live decodes started coming.  Recording into a
+// module that is not there yet dropped every one of them, and nothing replayed
+// them afterwards -- so the page opened empty and only filled in from decodes
+// heard after it, which is why it took a reload (landing on the tab, so the
+// module loads at startup) to show the whole picture.  Hold them here until
+// the module arrives, then hand them over.
+interface PendingDecodeStat { kind: string; rig: string | null; tsMs: number | undefined }
+const pendingDecodeStats: PendingDecodeStat[] = [];
+// The module's own log keeps 50k entries; there is no point holding more here.
+const PENDING_DECODE_STATS_MAX = 50_000;
+
+function recordDecodeStat(kind: string, rig: string | null, tsMs?: number) {
+  const stats = window.trx.modules.map;
+  if (stats) {
+    stats.statsRecordDecode(kind, rig, tsMs);
+    return;
+  }
+  pendingDecodeStats.push({ kind, rig, tsMs });
+  if (pendingDecodeStats.length > PENDING_DECODE_STATS_MAX) {
+    pendingDecodeStats.splice(0, pendingDecodeStats.length - PENDING_DECODE_STATS_MAX);
+  }
+}
+
+function flushPendingDecodeStats() {
+  const stats = window.trx.modules.map;
+  if (!stats || pendingDecodeStats.length === 0) return;
+  for (const entry of pendingDecodeStats.splice(0)) {
+    stats.statsRecordDecode(entry.kind, entry.rig, entry.tsMs);
+  }
+  stats.scheduleStatsRender();
+}
+
+function scheduleStatsRenderIfLoaded() {
+  window.trx.modules.map?.scheduleStatsRender();
+}
+
 function dispatchDecodeMessage(msg: DecodeMessage, skipStats = false) {
   if (msg.type) window.trxPluginRuntime.dispatch(msg.type, msg);
   if (!skipStats && msg.type && !IMAGE_DECODE_KINDS.has(msg.type)) {
-    window.trx.modules.map?.statsRecordDecode(msg.type, msg.rig_id || msg.remote || null);
-    window.trx.modules.map?.scheduleStatsRender();
+    recordDecodeStat(msg.type, msg.rig_id || msg.remote || null);
+    scheduleStatsRenderIfLoaded();
   }
 }
 
@@ -6651,9 +6691,9 @@ function restoreDecodeHistoryGroup(kind: string, messages: DecodeMessage[]) {
   // Record statistics for restored history messages.
   if (!IMAGE_DECODE_KINDS.has(kind)) {
     for (const msg of messages) {
-      window.trx.modules.map?.statsRecordDecode(kind, msg.rig_id || msg.remote || null, msg.ts_ms || undefined);
+      recordDecodeStat(kind, msg.rig_id || msg.remote || null, msg.ts_ms || undefined);
     }
-    window.trx.modules.map?.scheduleStatsRender();
+    scheduleStatsRenderIfLoaded();
   }
   window.trxPluginRuntime.restore(kind, messages);
 }

src/trx-client/trx-frontend/trx-frontend-http/frontend/src/plugins/ftx-family.ts

@@ -242,19 +242,28 @@ export function initializeFtxDecoder(config: FtxConfig): void {
     }
     messagesElement.replaceChildren(fragment);
   };
-  const normalize = (message: FtxMessage): FtxMessage => {
+  /** Hands a decode's grid squares to the map, if the map module is loaded yet.
+   *  Split out of normalize so a decode can be replayed onto a map that
+   *  arrived later: the module is lazy, and everything decoded before it
+   *  loaded had nowhere to go. */
+  const plotLocator = (message: FtxMessage): void => {
     const raw = message.message ?? "";
     const locatorDetails = bridge.ft8ExtractLocatorDetails?.(raw) ?? extractFtxLocatorDetails(raw);
     const grids = locatorDetails.length > 0
       ? locatorDetails.map(({ grid }) => grid)
       : bridge.ft8ExtractAllGrids?.(raw) ?? extractFtxGrids(raw);
+    if (grids.length === 0) return;
     const station = bridge.ft8ExtractLikelyCallsign?.(raw) ?? extractFtxCallsign(raw);
+    // Already an RF frequency on a replay, an audio offset on arrival; the
+    // conversion only fires below 100 kHz, so it is right either way.
     const frequency = displayFrequency(message.freq_hz);
-    if (grids.length > 0) {
-      bridge.mapAddLocator?.(raw, grids, id, station, {
-        ...message, freq_hz: frequency ?? message.freq_hz, locator_details: locatorDetails,
-      });
-    }
+    bridge.mapAddLocator?.(raw, grids, id, station, {
+      ...message, freq_hz: frequency ?? message.freq_hz, locator_details: locatorDetails,
+    });
+  };
+  const normalize = (message: FtxMessage): FtxMessage => {
+    const frequency = displayFrequency(message.freq_hz);
+    plotLocator(message);
     return {
       // The rig that heard it, kept so the mini view can tell a decode of the
       // rig on screen from one a background rig made on another band.
@@ -312,6 +321,8 @@ export function initializeFtxDecoder(config: FtxConfig): void {
     prune: () => { prune(); render(); },
     reset,
     rerender: () => { bridge.updateFt8Bar?.(); render(); },
+    // Oldest first, so the map builds the grids up in the order they were heard.
+    syncMap: () => { for (const message of [...history].reverse()) plotLocator(message); },
   });
   bridge.registerFt8FamilyBarRenderer?.(id, barFrames);
 

src/trx-client/trx-frontend/trx-frontend-http/frontend/src/plugins/wspr.ts

@@ -17,6 +17,9 @@ interface WsprMessage {
   dt_s?: number | undefined;
   freq_hz?: number | undefined;
   rig_id?: string | null | undefined;
+  /** RF frequency the spot was heard on, kept so a map replay does not
+   *  recompute it against wherever the dial has moved to since. */
+  _rfHz?: number | null | undefined;
   receiver?: unknown;
   [key: string]: unknown;
 }
@@ -135,6 +138,7 @@ function normalizeServerWsprMessage(msg: WsprMessage): { raw: string; grids: str
     rfHz,
     history: {
       rig_id: msg.rig_id ?? null,
+      _rfHz: rfHz,
       receiver: wsprWindow.getDecodeRigMeta ? wsprWindow.getDecodeRigMeta() : null,
       ts_ms: msg.ts_ms,
       snr_db: msg.snr_db,
@@ -152,12 +156,7 @@ function onServerWsprBatch(messages: WsprMessage[]): void {
     const next = normalizeServerWsprMessage(msg);
     // "Receiving" is the panel's own status, and the panel is the rig's.
     if (wsprStatus && isActiveRigDecode(msg.rig_id)) wsprStatus.textContent = "Receiving";
-    if (next.grids.length > 0 && wsprWindow.mapAddLocator) {
-      wsprWindow.mapAddLocator(next.raw, next.grids, "wspr", next.station, {
-        ...msg,
-        ...(next.rfHz === null ? {} : { freq_hz: next.rfHz }),
-      });
-    }
+    plotWsprLocator(msg);
     next.history._tsMs = Number.isFinite(next.history.ts_ms) ? Number(next.history.ts_ms) : Date.now();
     normalized.push(next.history);
   }
@@ -317,15 +316,24 @@ document.getElementById("settings-clear-wspr-history")?.addEventListener("click"
   })();
 });
 
+/** Hands a spot's grid squares to the map, if the map module is loaded yet.
+ *  The module is lazy, so a spot heard before it arrived has to be replayable. */
+function plotWsprLocator(msg: WsprMessage): void {
+  const next = normalizeServerWsprMessage(msg);
+  if (next.grids.length === 0 || !wsprWindow.mapAddLocator) return;
+  // A replayed spot carries the frequency it was heard on; a fresh one has it
+  // worked out from the dial it just arrived against.
+  const rfHz = finiteNumber(msg._rfHz) ?? next.rfHz;
+  wsprWindow.mapAddLocator(next.raw, next.grids, "wspr", next.station, {
+    ...msg,
+    ...(rfHz === null ? {} : { freq_hz: rfHz }),
+  });
+}
+
 function onServerWspr(msg: WsprMessage): void {
   if (wsprStatus && isActiveRigDecode(msg.rig_id)) wsprStatus.textContent = "Receiving";
   const next = normalizeServerWsprMessage(msg);
-  if (next.grids.length > 0 && wsprWindow.mapAddLocator) {
-    wsprWindow.mapAddLocator(next.raw, next.grids, "wspr", next.station, {
-      ...msg,
-      ...(next.rfHz === null ? {} : { freq_hz: next.rfHz }),
-    });
-  }
+  plotWsprLocator(msg);
   addWsprMessage(next.history);
 }
 
@@ -337,4 +345,6 @@ wsprWindow.trxPluginRuntime.registerDecoder({
   prune: pruneWsprHistoryView,
   reset: resetWsprHistoryView,
   rerender: renderWsprHistory,
+  // Oldest first, so the map builds the grids up in the order they were heard.
+  syncMap: () => { for (const message of [...wsprMessageHistory].reverse()) plotWsprLocator(message); },
 });

src/trx-client/trx-frontend/trx-frontend-http/frontend/tests/decode-flow.mjs

@@ -120,6 +120,8 @@ try {
 // left the client on its retry path and the history path untested.
 const HISTORY_AIS = 900;
 const HISTORY_APRS = 300;
+const HISTORY_FT8 = 12;
+const HISTORY_WSPR = 8;
 const historyFixture = await startWebFixture({
   spectrum: true,
   mode: "AIS",
@@ -129,6 +131,14 @@ const historyFixture = await startWebFixture({
       vessel_name: `HISTORIC ${index}`, channel: "A", message_type: 1,
       rig_id: "rig-a", ts_ms: Date.now() - (index + 1) * 1000,
     })),
+    ft8: Array.from({ length: HISTORY_FT8 }, (_, index) => ({
+      message: `CQ SP${index}ABC JO${String(index).padStart(2, "0")}`, snr_db: -7, dt_s: 0.2,
+      freq_hz: 1200 + index, rig_id: "rig-a", ts_ms: Date.now() - (index + 1) * 1000,
+    })),
+    wspr: Array.from({ length: HISTORY_WSPR }, (_, index) => ({
+      message: `SP${index}XYZ JN${String(index).padStart(2, "0")} 30`, snr_db: -22, dt_s: 0.5,
+      freq_hz: 1500 + index, rig_id: "rig-a", ts_ms: Date.now() - (index + 1) * 1000,
+    })),
     aprs: Array.from({ length: HISTORY_APRS }, (_, index) => ({
       src_call: `SP2SJG-${index % 15}`, dest_call: "APRS", path: "WIDE1-1",
       info: `history ${index}`, packet_type: "position", crc_ok: true,
@@ -216,6 +226,24 @@ try {
   assert.equal(plotted.ais, HISTORY_AIS, `${plotted.ais} of ${HISTORY_AIS} vessels reached the map`);
   assert.equal(plotted.stations, 15, `${plotted.stations} of 15 stations reached the map`);
 
+  // The Statistics page counts the same history. Its decode log lives in the
+  // map module, which is lazy, so every decode that arrived before the module
+  // did used to be recorded into nothing at all — the page opened empty and
+  // only filled in from decodes heard afterwards, and it took a reload landing
+  // on the tab (module loaded at startup, before the history) to show the lot.
+  await replay.page.evaluate(() => window.navigateToTab("statistics"));
+  await replay.page.waitForTimeout(1500);
+  const counted = await replay.page.evaluate(() => ({
+    decodes: Number(document.getElementById("stats-total-decodes")?.textContent ?? "0"),
+    grids: Number(document.getElementById("stats-unique-grids")?.textContent ?? "0"),
+  }));
+  assert.equal(counted.decodes, HISTORY_AIS + HISTORY_APRS + HISTORY_FT8 + HISTORY_WSPR,
+    `the statistics counted ${counted.decodes} decodes`);
+  // Grid squares come from the FT8 and WSPR spots, which had no map replay of
+  // their own: the locators of everything heard before the map loaded were lost.
+  assert.equal(counted.grids, HISTORY_FT8 + HISTORY_WSPR,
+    `the statistics counted ${counted.grids} grid squares`);
+
   assert.deepEqual(replay.runtimeErrors, []);
 } finally {
   await replay.browser.close();