feat: added versionning & About window

internal/cat/cat.go

@@ -184,6 +184,48 @@ func (m *Manager) SetPTT(on bool) error {
 	return m.exec(func(b Backend) error { return b.SetPTT(on) })
 }
 
+// SpotInfo is one cluster spot to render on a backend that supports a spot
+// overlay (the FlexRadio panadapter). Color is an optional "#AARRGGBB" string;
+// 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
+}
+
+// Spotter is an OPTIONAL backend capability: show cluster spots on the radio
+// (FlexRadio panadapter). Backends that don't implement it are simply skipped.
+type Spotter interface {
+	SendSpot(SpotInfo) error
+}
+
+// SendSpot pushes a cluster spot to the backend if it supports spotting. Runs on
+// the CAT goroutine and is fire-and-forget (dropped if the queue is busy) — a
+// missed spot on the panadapter is harmless.
+func (m *Manager) SendSpot(s SpotInfo) {
+	m.mu.RLock()
+	cmds := m.cmdCh
+	b := m.backend
+	m.mu.RUnlock()
+	if cmds == nil || b == nil {
+		return
+	}
+	if _, ok := b.(Spotter); !ok {
+		return
+	}
+	select {
+	case cmds <- func() {
+		if sp, ok := b.(Spotter); ok {
+			_ = sp.SendSpot(s)
+		}
+	}:
+	default: // queue busy → drop this spot
+	}
+}
+
 // exec marshals a backend operation onto the CAT goroutine. Returns the
 // operation's error or a "busy"/"not running" error if dispatch failed.
 func (m *Manager) exec(fn func(Backend) error) error {
@@ -210,23 +252,27 @@ func (m *Manager) run(b Backend, stop, done chan struct{}, cmds chan func(), pol
 	defer runtime.UnlockOSThread()
 	defer close(done)
 
-	if err := b.Connect(); err != nil {
-		m.update(RigState{
-			Enabled: true, Backend: b.Name(), Connected: false,
-			Error: err.Error(), UpdatedAt: time.Now(),
-		})
-		// Stay idle until Stop is called — let the user fix config and re-Start.
-		for {
-			select {
-			case <-stop:
-				return
-			case fn := <-cmds:
-				fn()
-			}
-		}
-	}
 	defer b.Disconnect()
 
+	// Connection is (re)established lazily and retried with a backoff, so a rig
+	// that's off at startup — or a FlexRadio that reboots/drops its TCP link —
+	// reconnects on its own instead of staying dead until the user toggles CAT.
+	const reconnectEvery = 5 * time.Second
+	connected := false
+	var lastAttempt time.Time
+	tryConnect := func() {
+		if connected || time.Since(lastAttempt) < reconnectEvery {
+			return
+		}
+		lastAttempt = time.Now()
+		if err := b.Connect(); err != nil {
+			m.update(RigState{Enabled: true, Backend: b.Name(), Connected: false, Error: err.Error(), UpdatedAt: time.Now()})
+			return
+		}
+		connected = true
+	}
+	tryConnect()
+
 	ticker := time.NewTicker(pollEvery)
 	defer ticker.Stop()
 
@@ -238,12 +284,18 @@ func (m *Manager) run(b Backend, stop, done chan struct{}, cmds chan func(), pol
 			fn()
 			m.applyCommandDelay()
 		case <-ticker.C:
+			if !connected {
+				tryConnect()
+				continue
+			}
 			ns, err := b.ReadState()
 			if err != nil {
-				m.update(RigState{
-					Enabled: true, Backend: b.Name(), Connected: false,
-					Error: err.Error(), UpdatedAt: time.Now(),
-				})
+				// Lost the rig — drop the backend so the next attempt reconnects
+				// cleanly, then back off before retrying.
+				connected = false
+				lastAttempt = time.Now()
+				b.Disconnect()
+				m.update(RigState{Enabled: true, Backend: b.Name(), Connected: false, Error: err.Error(), UpdatedAt: time.Now()})
 				continue
 			}
 			ns.Enabled = true