feat+fix batch: Station Control dashboard (fixed-width panels, grip-handle drag reorder, amp meters from the Flex stream, compact relays), Ultrabeam element list capped to 3 (READ_BANDS over-read), spot-click on Flex panadapter now sets mode, DAX TX toggle, DVK panel state persists across relaunch, duplicate amp meters cleared on power-cycle, QSO audio recording snapshot taken synchronously at log time (was racing the form-clear cancel), Flex COMP meter max -20->-25 and MIC scale to 0; changelog 0.20.10

internal/cat/flex.go

@@ -649,6 +649,18 @@ func (f *Flex) handleStatus(payload string) {
 			}
 			if removed {
 				f.amp = flexAmp{}
+				// The amp's meters (FWD / ID / TEMP …) don't always get an individual
+				// "meter removed" push, so power-cycling the amp left the OLD meter
+				// ids in the maps while the re-registered amp added NEW ones — the
+				// panel then showed every amp meter twice. Drop every AMP-sourced
+				// meter here so only the fresh set survives.
+				for id, mi := range f.meterMeta {
+					if strings.Contains(strings.ToUpper(mi.src), "AMP") {
+						delete(f.meterMeta, id)
+						delete(f.meterVal, id)
+						delete(f.meterSub, id)
+					}
+				}
 			}
 			f.mu.Unlock()
 		}
@@ -660,6 +672,26 @@ func (f *Flex) handleStatus(payload string) {
 				f.meterRawLogged = true
 				debugLog.Printf("Flex: meter status raw: %s", payload)
 			}
+			// Meter removal — "meter <id> removed": drop it so a stale value can't
+			// linger (e.g. after an amp/slice is torn down).
+			removedMeter := false
+			for _, tok := range fields[1:] {
+				if tok == "removed" || tok == "in_use=0" {
+					removedMeter = true
+				}
+			}
+			if removedMeter {
+				f.mu.Lock()
+				for _, tok := range fields[1:] {
+					if n, err := strconv.Atoi(strings.TrimSpace(tok)); err == nil {
+						delete(f.meterMeta, n)
+						delete(f.meterVal, n)
+						delete(f.meterSub, n)
+					}
+				}
+				f.mu.Unlock()
+				return
+			}
 			var newIDs []int
 			f.mu.Lock()
 			for _, tok := range fields[1:] {