fix: query gb32960 tdengine frames without vin

modules/services/event-history-service/src/main/java/com/lingniu/ingest/eventhistory/Gb32960DecodedFrameService.java

@@ -201,12 +201,10 @@ public final class Gb32960DecodedFrameService {
                                                  int frameLimit,
                                                  String vin,
                                                  String platformAccount) throws IOException {
-        if (vin == null || vin.isBlank()) {
+        String vehicleKey = vin == null ? "" : vin.trim();
-            return List.of();
-        }
         TdenginePage<TdengineRawFrameRow> page = tdengineReader.queryRawFrames(new TdengineRawFrameQuery(
                 "GB32960",
-                vin.trim(),
+                vehicleKey,
                 fromInstant(dateFrom, eventTimeFrom),
                 toExclusiveInstant(dateTo, eventTimeTo),
                 tdengineOrder(order),

modules/services/event-history-service/src/test/java/com/lingniu/ingest/eventhistory/Gb32960DecodedFrameServiceTest.java

@@ -341,6 +341,52 @@ class Gb32960DecodedFrameServiceTest {
                 .containsExactly("VEHICLE", "GD_FC_DCDC");
     }
 
+    @Test
+    void queryCanUseTdengineRawFramesWithoutVinForPlatformLoginFrames() throws Exception {
+        String key = "2026/06/22/GB32960/unknown-vin/platform-login.bin";
+        String uri = "archive://" + key;
+        writeArchive(key, platformLoginFrame());
+        CapturingTdengineReader reader = new CapturingTdengineReader(List.of(new TdengineRawFrameRow(
+                Instant.parse("2026-06-22T10:00:00Z"),
+                "tdengine-platform-login",
+                Instant.parse("2026-06-22T10:00:01Z"),
+                0x05,
+                0,
+                Instant.parse("2026-06-22T10:00:00Z"),
+                uri,
+                "sha256:test",
+                platformLoginFrame().length,
+                "SUCCEEDED",
+                "",
+                "8.134.95.166:37302",
+                "{\"platformAccount\":\"Hyundai\"}",
+                "GB32960",
+                "unknown:GB32960:platform-login",
+                "",
+                "")));
+
+        Gb32960DecodedFrameService service = new Gb32960DecodedFrameService(
+                reader,
+                decoder(),
+                archiveRoot,
+                null);
+
+        List<Gb32960DecodedFrameService.DecodedFrame> frames = service.query(
+                LocalDate.parse("2026-06-22"),
+                LocalDate.parse("2026-06-22"),
+                EventFileQuery.Order.DESC,
+                10,
+                null,
+                "Hyundai");
+
+        assertThat(reader.lastQuery.protocol()).isEqualTo("GB32960");
+        assertThat(reader.lastQuery.vehicleKey()).isBlank();
+        assertThat(reader.lastQuery.vin()).isBlank();
+        assertThat(frames).hasSize(1);
+        assertThat(frames.getFirst().command()).isEqualTo("PLATFORM_LOGIN");
+        assertThat(frames.getFirst().rawArchiveUri()).isEqualTo(uri);
+    }
+
     @Test
     void framePageUsesTdengineCursorAndReturnsNextCursor() throws Exception {
         String vin = "LNVFC000000000001";
@@ -584,6 +630,39 @@ class Gb32960DecodedFrameServiceTest {
         return out.toByteArray();
     }
 
+    private static byte[] platformLoginFrame() {
+        ByteArrayOutputStream body = new ByteArrayOutputStream();
+        body.write(26); body.write(6); body.write(22); body.write(18); body.write(0); body.write(0);
+        writeU16(body, 1);
+        writeAsciiPadded(body, "Hyundai", 12);
+        writeAsciiPadded(body, "f2e3445d7cda409fb4f", 20);
+        body.write(0x01);
+
+        byte[] bodyBytes = body.toByteArray();
+        ByteArrayOutputStream out = new ByteArrayOutputStream();
+        out.write(0x23); out.write(0x23);
+        out.write(0x05);
+        out.write(0xFE);
+        for (int i = 0; i < 17; i++) {
+            out.write(0);
+        }
+        out.write(0x01);
+        writeU16(out, bodyBytes.length);
+        out.write(bodyBytes, 0, bodyBytes.length);
+        byte[] almost = out.toByteArray();
+        out.write(BccChecksum.compute(almost, 2, almost.length - 2) & 0xFF);
+        return out.toByteArray();
+    }
+
+    private static void writeAsciiPadded(ByteArrayOutputStream out, String value, int length) {
+        byte[] bytes = value.getBytes(StandardCharsets.US_ASCII);
+        int count = Math.min(bytes.length, length);
+        out.write(bytes, 0, count);
+        for (int i = count; i < length; i++) {
+            out.write(0);
+        }
+    }
+
     private void writeArchive(String key, byte[] frame) throws Exception {
         Path rawFile = archiveRoot.resolve(key);
         Files.createDirectories(rawFile.getParent());