feat: tighten freestyle discovery and analyst handoff

apps/tui-go/internal/app/server.go

@@ -367,13 +367,22 @@ func (m *Model) applyServer(msg protocol.ServerMessage) {
 		if s := m.session(msg.SessionID); s != nil {
 			// The resolved gate names no tool on the wire; recover it from the pending
 			// queue before dropping the gate, for the inline row.
-			tool := ""
+			tool, preview := "", ""
 			for _, a := range s.PendingQueue {
 				if a.RequestID == msg.RequestID {
 					tool = a.ToolName
+					preview = a.Preview
 					break
 				}
 			}
+			// Extract the target (file path for diffs, command for shell) from the
+			// preview so the action row reads "approved file_write → healthcheck.sh".
+			target := ""
+			if tool == "file_write" && isUnifiedDiff(preview) {
+				target = diffTarget(preview)
+			} else if tool == "shell" && strings.HasPrefix(preview, "{") {
+				target = previewTarget(preview)
+			}
 			// Drop just the resolved gate; any others stay queued and the band
 			// advances to the next rather than vanishing entirely.
 			s.removeApproval(msg.RequestID)
@@ -383,7 +392,7 @@ func (m *Model) applyServer(msg protocol.ServerMessage) {
 			}
 			s.addEvent(msg.OccurredAt, "ApprovalResolved", detail)
 			s.LastEventAt = nowMillis()
-			m.appendAction(msg.SessionID, approvalIcon(msg.Outcome), approvalActionText(msg.Outcome, tool, msg.Reason))
+			m.appendAction(msg.SessionID, approvalIcon(msg.Outcome), approvalActionText(msg.Outcome, tool, target, msg.Reason))
 		}
 	case protocol.TypeSessionSnapshot:
 		m.onSnapshot(msg)
@@ -580,11 +589,13 @@ func lastToolParams(s *Session, name string) []string {
 }
 
 // paramSuffix renders pretty call args as a " (k=v · k=v)" suffix, or "" when there are none.
+// The clip is generous (200 cols) so real tool arguments like shell commands, grep patterns,
+// and file paths are legible — the panel width is the real limit.
 func paramSuffix(params []string) string {
 	if len(params) == 0 {
 		return ""
 	}
-	return " (" + clip(strings.Join(params, " · "), 56) + ")"
+	return " (" + clip(strings.Join(params, " · "), 200) + ")"
 }
 
 // actionToolText joins a tool label with a short, clipped result summary.
@@ -608,7 +619,7 @@ func approvalIcon(outcome string) string {
 
 // approvalActionText renders the inline approval row, noting an auto-approval that fired via a
 // standing grant (reason "grant:<id>").
-func approvalActionText(outcome, tool, reason string) string {
+func approvalActionText(outcome, tool, target, reason string) string {
 	verb := "approved"
 	switch outcome {
 	case "REJECTED":
@@ -620,12 +631,39 @@ func approvalActionText(outcome, tool, reason string) string {
 	if tool != "" {
 		txt = verb + " " + tool
 	}
+	if target != "" {
+		txt += " → " + target
+	}
 	if strings.HasPrefix(reason, "grant:") {
 		txt += " · via grant"
 	}
 	return txt
 }
 
+// previewTarget extracts a short target label from a JSON preview payload
+// (e.g. {"argv":["bash","-c","curl ..."]} → the last argv element, truncated).
+func previewTarget(preview string) string {
+	// Naive extraction: find "argv" array and return the last element
+	if i := strings.Index(preview, `"argv":`); i >= 0 {
+		rest := preview[i+len(`"argv":`):]
+		if j := strings.IndexByte(rest, '['); j >= 0 {
+			argv := rest[j:]
+			if k := strings.IndexByte(argv, ']'); k >= 0 {
+				argv = argv[:k+1]
+			}
+			// Parse comma-separated strings, grab the last non-empty
+			parts := strings.Split(strings.Trim(argv, "[]"), ",")
+			for i := len(parts) - 1; i >= 0; i-- {
+				candidate := strings.Trim(strings.Trim(parts[i], ` "`), `"`)
+				if candidate != "" {
+					return clip(candidate, 40)
+				}
+			}
+		}
+	}
+	return ""
+}
+
 // onSessionAnnounced fills in a session's workflow identity (the announce is the
 // only event carrying workflowId) and applies auto-focus. The session entry itself
 // was already created by the auto-vivify path in applyServer.