測試改斷言具體結束碼數值，對照 README 規格（#10）

cli_test、dailyops_commands_test、login_test、exitcode_test 原以
int(ExitUsage)/int(ExitAPI)/int(ExitInternal) 常數互比，常數若再
與 README 脫鉤測試仍會綠。改為直接斷言 0/2/3（內部錯誤 1）。

常數本體已隨 #5（6951817）改為明確數值，未知命令實測回 2。

internal/cli/exitcode_test.go

@@ -10,20 +10,22 @@ import (
 )
 
 func TestExitCodeMapping(t *testing.T) {
+	// want 直接寫 README「輸出與結束碼」的數值（0／2／3；內部錯誤 1），
+	// 不以常數互比，避免常數與規格再次脫鉤（#10）。
 	cases := []struct {
 		name string
 		err  error
-		want ExitCode
+		want int
 	}{
-		{"usage error", &ErrUsage{Msg: "bad flag"}, ExitUsage},
-		{"api error 401", &gitea.ErrAPI{StatusCode: 401, Op: "GET /api/v1/user"}, ExitAPI},
-		{"api error transport", &gitea.ErrAPI{Op: "GET /api/v1/user", Err: errString("dial tcp")}, ExitAPI},
-		{"wrapped api error", wrapped(&gitea.ErrAPI{StatusCode: 500}), ExitAPI},
-		{"other error", errString("boom"), ExitInternal},
-		{"nil maps to OK", nil, ExitOK},
+		{"usage error", &ErrUsage{Msg: "bad flag"}, 2},
+		{"api error 401", &gitea.ErrAPI{StatusCode: 401, Op: "GET /api/v1/user"}, 3},
+		{"api error transport", &gitea.ErrAPI{Op: "GET /api/v1/user", Err: errString("dial tcp")}, 3},
+		{"wrapped api error", wrapped(&gitea.ErrAPI{StatusCode: 500}), 3},
+		{"other error", errString("boom"), 1},
+		{"nil maps to OK", nil, 0},
 	}
 	for _, tc := range cases {
-		if got := exitCodeFor(tc.err); got != tc.want {
+		if got := int(exitCodeFor(tc.err)); got != tc.want {
 			t.Errorf("%s: exitCodeFor = %d, want %d", tc.name, got, tc.want)
 		}
 	}