refactor(track): split terminal field into terminal and multiplexer

Separate the combined "terminal -> multiplexer" format into two distinct
fields for cleaner server-side storage and querying.

- Change ResolveTerminal to return (terminal, multiplexer) tuple
- Add Multiplexer field to TrackingMetaData struct
- Update sync handler to populate both fields

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: AnnatarHe

daemon/handlers.sync.go

@@ -36,9 +36,10 @@ func handlePubSubSync(ctx context.Context, socketMsgPayload interface{}) error {
 
 	// Resolve terminal from PPID (use first data item's PPID)
 	if len(syncMsg.Data) > 0 && syncMsg.Data[0].PPID > 0 {
-		terminal := ResolveTerminal(syncMsg.Data[0].PPID)
+		terminal, multiplexer := ResolveTerminal(syncMsg.Data[0].PPID)
 		syncMsg.Meta.Terminal = terminal
-		slog.Debug("Resolved terminal", slog.String("terminal", terminal), slog.Int("ppid", syncMsg.Data[0].PPID))
+		syncMsg.Meta.Multiplexer = multiplexer
+		slog.Debug("Resolved terminal", slog.String("terminal", terminal), slog.String("multiplexer", multiplexer), slog.Int("ppid", syncMsg.Data[0].PPID))
 	}
 
 	// set as daemon

daemon/terminal_resolver.go

@@ -58,16 +58,13 @@ var knownRemote = map[string]bool{
 }
 
 // ResolveTerminal walks up the process tree starting from ppid
-// to find the terminal emulator. Returns raw process names.
-// Format: "terminal" or "terminal -> multiplexer" for multiplexed sessions
-func ResolveTerminal(ppid int) string {
+// to find the terminal emulator and multiplexer separately.
+// Returns (terminal, multiplexer) as separate values.
+func ResolveTerminal(ppid int) (terminal string, multiplexer string) {
 	if ppid <= 0 {
-		return ""
+		return "", ""
 	}
 
-	var terminal string
-	var multiplexer string
-
 	currentPID := ppid
 	visited := make(map[int]bool)
 
@@ -111,20 +108,12 @@ func ResolveTerminal(ppid int) string {
 		currentPID = parentPID
 	}
 
-	// Build result string
+	// If neither found, return "unknown" for terminal
 	if terminal == "" && multiplexer == "" {
-		return "unknown"
-	}
-
-	if terminal != "" && multiplexer != "" {
-		return terminal + " -> " + multiplexer
-	}
-
-	if terminal != "" {
-		return terminal
+		return "unknown", ""
 	}
 
-	return multiplexer
+	return terminal, multiplexer
 }
 
 // getProcessName returns the process name for the given PID

model/api.go

@@ -29,7 +29,8 @@ type TrackingMetaData struct {
 	OS        string `json:"os"`
 	OSVersion string `json:"osVersion"`
 	Shell     string `json:"shell"`
-	Terminal  string `json:"terminal,omitempty"`
+	Terminal    string `json:"terminal,omitempty"`
+	Multiplexer string `json:"multiplexer,omitempty"`
 
 	// 0: cli, 1: daemon
 	Source int `json:"source"`