Firmware update modal added

src/components/ota_update_components/OtaCommands.ts

@@ -0,0 +1,53 @@
+// OTA command senders. The firmware listens on the WebSocket for two-byte
+// binary frames [FIRMWARE_UPDATE_CMD_HEAD, cmd_id] (see command_interface.h
+// in the firmware). The dispatch is currently commented out in
+// websocket_server.cpp — uncomment it on the firmware side to make these flow.
+//
+// Per the firmware retarget choice, the S3 build reuses the P4 enum slots:
+//   0x00 = REQUEST_AVAILABLE_UPDATES
+//   0x02 = START_UPDATE (S3 firmware)
+//   0x03 = START_UPDATE (S3 webinterface)
+import { $websocket } from "../WebSocketAtom";
+
+const FIRMWARE_UPDATE_CMD_HEAD = 0xBB;
+
+const FIRMWARE_UPDATE_CMD_REQUEST_AVAILABLE_UPDATES = 0x00;
+const FIRMWARE_UPDATE_CMD_START_UPDATE_S3_FIRMWARE = 0x02;       // reused P4 slot
+const FIRMWARE_UPDATE_CMD_START_UPDATE_S3_WEBINTERFACE = 0x03;   // reused P4 slot
+
+function wsOpen(): WebSocket | null {
+  const ws = $websocket.get();
+  return ws && (ws as WebSocket).readyState === WebSocket.OPEN ? (ws as WebSocket) : null;
+}
+
+function sendFwCommand(cmdId: number): boolean {
+  const ws = wsOpen();
+  if (!ws) {
+    console.error("[OTA] WS not open, cannot send command", cmdId);
+    return false;
+  }
+  ws.send(new Uint8Array([FIRMWARE_UPDATE_CMD_HEAD, cmdId]));
+  return true;
+}
+
+export function request_available_updates(): boolean {
+  return sendFwCommand(FIRMWARE_UPDATE_CMD_REQUEST_AVAILABLE_UPDATES);
+}
+
+export function start_firmware_update_s3_fw(): boolean {
+  return sendFwCommand(FIRMWARE_UPDATE_CMD_START_UPDATE_S3_FIRMWARE);
+}
+
+export function start_firmware_update_s3_web(): boolean {
+  return sendFwCommand(FIRMWARE_UPDATE_CMD_START_UPDATE_S3_WEBINTERFACE);
+}
+
+// Sent on WS open so the firmware updates its currentVersion for the
+// LittleFS image. The bundled web app is the source of truth for this
+// version (LITTLEFS_VERSION in AppProviderStore.tsx).
+export function send_webinterface_version(version: string): boolean {
+  const ws = wsOpen();
+  if (!ws) return false;
+  ws.send(JSON.stringify({ message_type: "set_webinterface_version", version }));
+  return true;
+}