Add EMS NDS Adapter+ support for DS/3DS save backup

THIRD-PARTY-LICENSES

@@ -3,6 +3,19 @@ open-source projects. Their original license texts are reproduced below.
 
 ================================================================================
 
+ndsplus
+https://github.com/Thulinma/ndsplus
+
+EMS NDS Adapter+ protocol commands, save type detection, and bulk transfer
+sequences in src/lib/drivers/ems-nds/ were derived from the ndsplus Linux
+command-line tool by Thulinma.
+
+License: GNU General Public License v3.0
+
+See LICENSE in this repository (same license applies to nabu as a whole).
+
+================================================================================
+
 FlashGBX
 https://github.com/lesserkuma/FlashGBX
 
@@ -46,6 +59,63 @@ SOFTWARE.
 
 ================================================================================
 
+powerslaves
+https://github.com/kitlith/powerslaves
+
+PowerSaves 3DS HID protocol (packet framing, opcodes, mode-switch sequence,
+SPI/NTR passthrough) in src/lib/drivers/powersave-3ds/ was ported from the
+powerslaves C library.
+
+License: MIT
+
+Copyright (c) 2017 kitlith
+
+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.
+
+================================================================================
+
+ndsplus
+https://github.com/Thulinma/ndsplus
+
+EMS NDS Adapter+ USB protocol commands and save read/write sequences in
+src/lib/drivers/ems-nds/ were implemented from the ndsplus reference
+implementation by Thulinma.
+
+License: GNU General Public License v3.0
+
+See LICENSE in this repository (same license applies to nabu as a whole).
+
+================================================================================
+
+ndstool (devkitPro)
+https://github.com/devkitPro/ndstool
+
+NDS maker-code → publisher name lookup table in
+src/lib/systems/nds/nds-maker-codes.ts was derived from ndstool's
+ndscodes.cpp.
+
+License: GNU General Public License v3.0
+
+See LICENSE in this repository (same license applies to nabu as a whole).
+
+================================================================================
+
 AmiiboAPI
 https://github.com/N3evin/AmiiboAPI
 

src/App.tsx

@@ -17,7 +17,9 @@ import { GBSystemHandler } from "@/lib/systems/gb/gb-system-handler";
 import { GBASystemHandler } from "@/lib/systems/gba/gba-system-handler";
 import { AmiiboScanner } from "@/components/wizard/amiibo-scanner";
 import { InfinityScanner } from "@/components/wizard/infinity-scanner";
+import { NDSScanner } from "@/components/wizard/nds-scanner";
 import type { InfinityDriver } from "@/lib/drivers/infinity/infinity-driver";
+import type { NDSDeviceDriver } from "@/lib/systems/nds/nds-header";
 import type {
   DeviceDriver,
   DeviceInfo,
@@ -142,7 +144,10 @@ function App() {
     (_driver: DeviceDriver, _info: DeviceInfo) => {
       // Scanner-based devices handle detection in their own polling loop
       const isScanner = _driver.capabilities.some(
-        (c) => c.systemId === "amiibo" || c.systemId === "disney-infinity",
+        (c) =>
+          c.systemId === "amiibo" ||
+          c.systemId === "disney-infinity" ||
+          c.systemId === "nds_save",
       );
       if (!isScanner) autoDetectSystem(_driver);
     },
@@ -176,6 +181,9 @@ function App() {
     connection.driver?.capabilities.some(
       (c) => c.systemId === "disney-infinity",
     ) ?? false;
+  const isNDSSaveDevice =
+    connection.driver?.capabilities.some((c) => c.systemId === "nds_save") ??
+    false;
 
   const badgeState = useMemo(() => {
     if (dumpJob.state !== "idle") return dumpJob.state;
@@ -331,6 +339,14 @@ function App() {
                 onDisconnect={handleDisconnect}
                 log={log}
               />
+            ) : isNDSSaveDevice ? (
+              <NDSScanner
+                driver={connection.driver! as NDSDeviceDriver}
+                deviceInfo={connection.deviceInfo}
+                onDisconnect={handleDisconnect}
+                log={log}
+                nointroDb={nointro.getDb("nds_save")}
+              />
             ) : (
               <div className="flex flex-col gap-6">
                 <ConfigureStep