Implement inbox read cursors for unread threads

internal/cli/inbox/integration_test.go

@@ -316,6 +316,7 @@ func TestInboxRenewWaitReplyAndCancel(t *testing.T) {
 	go func() {
 		stdout, stderr, exitCode := executeInboxCommand(
 			"--db", dbPath,
+			"--agent", "worker-c",
 			"--json",
 			"wait-reply",
 			"--thread", threadID,
@@ -359,6 +360,18 @@ func TestInboxRenewWaitReplyAndCancel(t *testing.T) {
 		t.Fatalf("expected answer wake message, got %q", kind)
 	}
 
+	stdout, _, exitCode := executeInboxCommand(
+		"--db", dbPath,
+		"--agent", "worker-c",
+		"--json",
+		"fetch",
+		"--status", "blocked",
+		"--unread",
+	)
+	if exitCode != 10 {
+		t.Fatalf("expected blocked unread list to be cleared after wait-reply, got exit %d with %s", exitCode, stdout)
+	}
+
 	cancelOut := runInboxCommand(
 		t,
 		"--db", dbPath,
@@ -533,6 +546,96 @@ func TestInboxWatchListUnreadAndAppend(t *testing.T) {
 	}
 }
 
+func TestInboxUnreadReadCursor(t *testing.T) {
+	t.Parallel()
+
+	dbPath := filepath.Join(t.TempDir(), "coord.db")
+
+	runInboxCommand(t, "--db", dbPath, "--json", "init")
+
+	sendOut := runInboxCommand(
+		t,
+		"--db", dbPath,
+		"--json",
+		"send",
+		"--from", "leader",
+		"--to", "worker-e",
+		"--subject", "Review navbar copy",
+		"--summary", "Check top nav wording",
+	)
+
+	var sendResp map[string]any
+	mustDecodeJSON(t, sendOut, &sendResp)
+	threadID := nestedString(t, sendResp, "data", "thread", "thread_id")
+
+	fetchOut := runInboxCommand(
+		t,
+		"--db", dbPath,
+		"--json",
+		"fetch",
+		"--agent", "worker-e",
+		"--status", "pending",
+		"--unread",
+	)
+
+	var fetchResp map[string]any
+	mustDecodeJSON(t, fetchOut, &fetchResp)
+	threads, ok := nestedValue(t, fetchResp, "data", "threads").([]any)
+	if !ok || len(threads) != 1 {
+		t.Fatalf("expected one unread pending thread, got %#v", nestedValue(t, fetchResp, "data", "threads"))
+	}
+
+	runInboxCommand(
+		t,
+		"--db", dbPath,
+		"--agent", "worker-e",
+		"--json",
+		"show",
+		"--thread", threadID,
+		"--mark-read",
+	)
+
+	stdout, _, exitCode := executeInboxCommand(
+		"--db", dbPath,
+		"--json",
+		"fetch",
+		"--agent", "worker-e",
+		"--status", "pending",
+		"--unread",
+	)
+	if exitCode != 10 {
+		t.Fatalf("expected unread fetch to clear after mark-read, got exit %d with %s", exitCode, stdout)
+	}
+
+	runInboxCommand(
+		t,
+		"--db", dbPath,
+		"--json",
+		"send",
+		"--from", "leader",
+		"--to", "worker-e",
+		"--thread", threadID,
+		"--summary", "Use sentence case",
+		"--body", "Keep the nav labels in sentence case.",
+	)
+
+	fetchOut = runInboxCommand(
+		t,
+		"--db", dbPath,
+		"--json",
+		"fetch",
+		"--agent", "worker-e",
+		"--status", "pending",
+		"--unread",
+	)
+
+	mustDecodeJSON(t, fetchOut, &fetchResp)
+	threads, ok = nestedValue(t, fetchResp, "data", "threads").([]any)
+	if !ok || len(threads) != 1 {
+		t.Fatalf("expected unread thread to reappear after new message, got %#v", nestedValue(t, fetchResp, "data", "threads"))
+	}
+}
+
 func TestInboxJSONErrorsAndExitCodes(t *testing.T) {
 	t.Parallel()