Add device agent library

Provide enrollment, elevated install, posture checks, keystore, and
system-tray helpers shared by the probo-agent binary.

Signed-off-by: Ludovic Vielle <ludovic@probo.com>

pkg/deviceagent/enroll_url_test.go

@@ -0,0 +1,98 @@
+// Copyright (c) 2026 Probo Inc <hello@probo.com>.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+// SOFTWARE.
+
+package deviceagent
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func TestParseEnrollURL(t *testing.T) {
+	t.Parallel()
+
+	t.Run(
+		"parses host enroll URL",
+		func(t *testing.T) {
+			t.Parallel()
+
+			serverURL, enrollmentToken, err := ParseEnrollURL(
+				"probo://enroll?server=https%3A%2F%2Fus.probo.com&token=secret-token",
+			)
+			require.NoError(t, err)
+			assert.Equal(t, "https://us.probo.com", serverURL)
+			assert.Equal(t, "secret-token", enrollmentToken)
+		},
+	)
+
+	t.Run(
+		"rejects non-enroll host",
+		func(t *testing.T) {
+			t.Parallel()
+
+			_, _, err := ParseEnrollURL(
+				"probo:///enroll?server=https%3A%2F%2Feu.probo.com&token=abc123",
+			)
+			require.Error(t, err)
+			assert.ErrorContains(t, err, "enrollment URL must be probo://enroll")
+		},
+	)
+
+	t.Run(
+		"rejects non probo scheme",
+		func(t *testing.T) {
+			t.Parallel()
+
+			_, _, err := ParseEnrollURL(
+				"https://example.com/enroll?server=https%3A%2F%2Fus.probo.com&token=secret-token",
+			)
+			require.Error(t, err)
+			assert.ErrorContains(t, err, "probo scheme")
+		},
+	)
+
+	t.Run(
+		"rejects missing token",
+		func(t *testing.T) {
+			t.Parallel()
+
+			_, _, err := ParseEnrollURL(
+				"probo://enroll?server=https%3A%2F%2Fus.probo.com",
+			)
+			require.Error(t, err)
+			assert.ErrorContains(t, err, "enrollment token is missing")
+		},
+	)
+
+	t.Run(
+		"rejects invalid server URL",
+		func(t *testing.T) {
+			t.Parallel()
+
+			_, _, err := ParseEnrollURL(
+				"probo://enroll?server=https%3A%2F%2Fus.probo.com%2Fextra&token=abc123",
+			)
+			require.Error(t, err)
+			assert.ErrorContains(t, err, "invalid server")
+		},
+	)
+}