feat(right_arm): endpoint /snapshot/{front,wrist}

tests/test_right_arm_routes.py

@@ -60,3 +60,36 @@ def test_activate_sets_robot_active_g1_and_side_right():
         body = r.json()
         assert body["robot_active"] == "g1"
         assert body["side"] == "right"
+
+
+def test_snapshot_front_returns_jpeg():
+    fake_jpeg = b"\xff\xd8\xff" + b"\x00" * 100  # magic JPEG bytes
+    with patch("presa_mano.api.right_arm_routes._deps.front_camera") as factory:
+        cam = MagicMock()
+        cam.rgb_jpeg.return_value = fake_jpeg
+        factory.return_value = cam
+        r = client.get("/api/right_arm/snapshot/front")
+        assert r.status_code == 200
+        assert r.headers["content-type"].startswith("image/jpeg")
+        assert r.content == fake_jpeg
+
+
+def test_snapshot_wrist_returns_jpeg():
+    fake_jpeg = b"\xff\xd8\xff" + b"\x00" * 50
+    with patch("presa_mano.api.right_arm_routes._deps.nuwa") as factory:
+        cam = MagicMock()
+        cam.rgb_jpeg.return_value = fake_jpeg
+        factory.return_value = cam
+        r = client.get("/api/right_arm/snapshot/wrist")
+        assert r.status_code == 200
+        assert r.headers["content-type"].startswith("image/jpeg")
+        assert r.content == fake_jpeg
+
+
+def test_snapshot_front_502_on_failure():
+    with patch("presa_mano.api.right_arm_routes._deps.front_camera") as factory:
+        cam = MagicMock()
+        cam.rgb_jpeg.side_effect = RuntimeError("connection refused")
+        factory.return_value = cam
+        r = client.get("/api/right_arm/snapshot/front")
+        assert r.status_code == 502