chore: release v0.26.3

internal/cat/cat.go

@@ -290,12 +290,20 @@ func (m *Manager) SetSplit(on bool, txHz int64) error {
 // the backend picks a default when it's empty. (Status-based colouring can be
 // driven later by setting Color per spot.)
 type SpotInfo struct {
-	FreqHz      int64
-	Callsign    string
-	Mode        string
-	Color       string
-	Comment     string
-	LifetimeSec int // panadapter display seconds before auto-removal (0 = backend default)
+	FreqHz   int64
+	Callsign string
+	Mode     string
+	// Color is the TEXT colour of the callsign on the panadapter, BackgroundColor
+	// the plate behind it. Both are #AARRGGBB — the alpha channel first, which is
+	// SmartSDR's order and not the web's.
+	//
+	// Two colours rather than one because that is what makes a spot readable at a
+	// glance on a busy waterfall: the fill carries the status and the text stays
+	// legible against it. An empty background leaves the radio's own default.
+	Color           string
+	BackgroundColor string
+	Comment         string
+	LifetimeSec     int // panadapter display seconds before auto-removal (0 = backend default)
 }
 
 // Spotter is an OPTIONAL backend capability: show cluster spots on the radio
@@ -475,7 +483,10 @@ type FlexController interface {
 	SetRXAntenna(string) error
 	SetTXAntenna(string) error
 	SetActiveSlice(int) error // focus slice idx so commands target it
-	SetTXSlice(int) error     // make slice idx the transmitter (tx=1)
+	// ZoomPan sets the visible width (MHz) of the active slice's panadapter and
+	// keeps freqMHz inside it, re-centring when it must. See Flex.ZoomPan.
+	ZoomPan(bandwidthMHz, freqMHz float64, centre bool) error
+	SetTXSlice(int) error // make slice idx the transmitter (tx=1)
 	SetSplit(bool) error
 	SetNB(bool) error
 	SetNBLevel(int) error