fix: start web stats capture from boot on >=4MB PSRAM boards

src/helpers/StatsHistory.cpp

@@ -64,6 +64,14 @@ bool shouldUseLiveOnlyStats() {
 #endif
 }
 
+bool hasBootAutoCapturePsram() {
+#if defined(ESP32)
+  return psramFound() && ESP.getPsramSize() >= (4UL * 1024UL * 1024UL);
+#else
+  return false;
+#endif
+}
+
 template <typename T>
 T* allocHistoryBuffer(size_t count) {
 #if defined(ESP32)
@@ -291,6 +299,9 @@ void StatsHistory::begin(bool enabled, ArchiveStorage* archive) {
   _enabled = enabled;
   _next_summary_flush_ms = millis() + kSummaryFlushIntervalMs;
   _next_event_flush_ms = millis() + kEventFlushIntervalMs;
+  if (_enabled && shouldAutoActivateFromBoot()) {
+    activate();
+  }
 }
 
 void StatsHistory::setArchive(ArchiveStorage* archive) {
@@ -315,6 +326,9 @@ void StatsHistory::setEnabled(bool enabled) {
     _last_access_ms = 0;
     _next_summary_flush_ms = millis() + kSummaryFlushIntervalMs;
     _next_event_flush_ms = millis() + kEventFlushIntervalMs;
+    if (shouldAutoActivateFromBoot()) {
+      activate();
+    }
   }
 }
 
@@ -397,6 +411,10 @@ bool StatsHistory::supportsPersistence() const {
   return !_live_only;
 }
 
+bool StatsHistory::shouldAutoActivateFromBoot() const {
+  return _enabled && !_live_only && hasBootAutoCapturePsram();
+}
+
 bool StatsHistory::isAccessActive(uint32_t now_ms) const {
   if (!_live_only) {
     return true;

src/helpers/StatsHistory.h

@@ -106,6 +106,7 @@ private:
   bool ensureBuffers();
   void releaseBuffers();
   bool supportsPersistence() const;
+  bool shouldAutoActivateFromBoot() const;
   bool isAccessActive(uint32_t now_ms) const;
   bool restoreSummaryLog();
   bool restoreEventsLog();

src/helpers/web/WebPanelServer.cpp

@@ -1684,7 +1684,7 @@ const char kWebPanelAppHtml[] PROGMEM = R"HTML(
     function sparkStrokeColor(key, points) {
       if (key === "packets") return "#d97706";
       if (key === "signal") return "#3b82f6";
-      if (key === "noise_floor") return "#ef4444";
+      if (key === "noise_floor") return "#94a3b8";
       if (key === "memory") {
         const values = Array.isArray(points) ? points.map((item) => item && item[1]).filter((value) => Number.isFinite(value)) : [];
         const current = values.length ? values[values.length - 1] : NaN;