Proxy settings don't work

**Describe the bug**
Batch Explorer doesn't work in closed networks even if configured proxy settings. Because the proxy settings are broken due to a [MSAL bug](https://github.com/AzureAD/microsoft-authentication-library-for-js/issues/8024). The MSAL bug is not fixed in v2.x, 3.x, v5.x too. However, the MSAL bug can work around by code change of Batch Explorer.

- :point_right::beetle: [proxyUrl implementation is broken (and here is a two-line fix) #8024](https://github.com/AzureAD/microsoft-authentication-library-for-js/issues/8024)
- https://github.com/AzureAD/microsoft-authentication-library-for-js/blob/431d989f7abe8a31027d1673f09a066f668a64a2/lib/msal-node/src/network/HttpClient.ts#L170

**To Reproduce**
Steps to reproduce the behavior:
1. Prepare a server/PC that running Windows such as Windows 11, Windows Server 2025 Datacenter, etc.
2. Connect that machine to a closed network. That machine can access to the internet via a proxy.
3. Configure Windows proxy settings from **Settings - Network & internet - Proxy - Use a proxy server**.
4. Install the Batch Explorer on that Windows machine.
5. Launch the Batch Explorer.
6. Open **Edit - Configure Proxy** from the menu of the Batch Explorer.
7. Configure the proxy settings and click **Save** button. The Batch Explorer will relaunch automatically.
- e.g. Url: `http://10.3.1.4`, Port: `3128`
8. Enable **Use system browser for authentication** and click **Sign in to Azure**.
10. The system browser such as Microsoft Edge will launch automatically.
11. Sign in to Azure on the system browser. After sign in completed, show `Successfully logged in to Batch Explorer. You may close this window.` on the system browser.
12. However, the Batch Explorer window is no change. It's shows still **Sign in to Azure**. You cannot retrieve your Batch account information. You cannot access your Batch accounts via Batch Explorer.

**Expected behavior**
Batch Explorer does work in closed network with proxy settings.

**Screenshots**
N/A

**Logs:**

app.log.2026-03-23

```log
{"0":"Uncaught (in promise): {\"errorCode\":\"unknown_error\",\"errorMessage\":\"Error(s): Not Available - Timestamp: Not Available - Description: An unknown error occured.\\nHttp status code: NaN\\nHttp status message: Unknown\\nHeaders: {} - Correlation ID: Not Available - Trace ID: Not Available\",\"subError\":\"\",\"name\":\"ServerError\",\"correlationId\":\"1b1f77b6-3309-46d2-9d9a-a4fedd022b35\"}","level":"error","message":"[BL] Uncaught exception:","timestamp":"2026-03-23T06:26:09.693Z"}
```

client.log.2026-03-23

```log
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{"level":"info","message":"Registered ms-batch-explorer:// as a protocol for Batch Explorer","timestamp":"2026-03-23T06:07:50.936Z"}
{"level":"info","message":"Registered ms-batchlabs:// as a protocol for Batch Explorer","timestamp":"2026-03-23T06:07:50.936Z"}
{"level":"info","message":"Checking for update","timestamp":"2026-03-23T06:07:52.194Z"}
{"level":"info","message":"Generated new staging user ID: f5e47da2-6e02-5f17-8683-6c585c39cd2d","timestamp":"2026-03-23T06:07:52.195Z"}
{"level":"info","message":"Checking for update (already in progress)","timestamp":"2026-03-23T06:07:52.220Z"}
{"level":"info","message":"Update for version 2.23.0-stable.1210 is not available (latest version: 2.23.0-stable.1210, downgrade is allowed).","timestamp":"2026-03-23T06:07:52.277Z"}
{"level":"info","message":"Restarting application","timestamp":"2026-03-23T06:23:01.548Z"}
{"level":"info","message":"Main Window MainWindowManager closed. Quitting the app.","timestamp":"2026-03-23T06:23:01.649Z"}
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{"level":"info","message":"Registered ms-batch-explorer:// as a protocol for Batch Explorer","timestamp":"2026-03-23T06:23:04.376Z"}
{"level":"info","message":"Registered ms-batchlabs:// as a protocol for Batch Explorer","timestamp":"2026-03-23T06:23:04.377Z"}
{"http":"http://10.3.1.4:3128","https":"http://10.3.1.4:3128","level":"info","message":"Loaded proxy settings","timestamp":"2026-03-23T06:23:04.378Z"}
{"level":"info","message":"Checking for update","timestamp":"2026-03-23T06:23:05.619Z"}
{"level":"info","message":"Checking for update (already in progress)","timestamp":"2026-03-23T06:23:05.648Z"}
{"level":"info","message":"Update for version 2.23.0-stable.1210 is not available (latest version: 2.23.0-stable.1210, downgrade is allowed).","timestamp":"2026-03-23T06:23:05.709Z"}
{"level":"info","message":"[organizations] Proxying auth endpoints through http://10.3.1.4:3128","timestamp":"2026-03-23T06:24:43.128Z"}
{"level":"debug","message":"[organizations] Trying to acquire token silently","timestamp":"2026-03-23T06:24:43.129Z"}
{"level":"debug","message":"[organizations] Silent token acquisition failed: Error: [internal] No valid account found for silent auth","timestamp":"2026-03-23T06:24:43.131Z"}
{"level":"debug","message":"[organizations] Interactive auth code flow with system browser (Error: [internal] No valid account found for silent auth)","timestamp":"2026-03-23T06:24:43.131Z"}
{"level":"debug","message":"Initialized auth code listener on port 3874","timestamp":"2026-03-23T06:24:43.138Z"}
{"level":"warn","message":"[organizations] Failed to authenticate with browser: ServerError: unknown_error: Error(s): Not Available - Timestamp: Not Available - Description: An unknown error occured.\nHttp status code: NaN\nHttp status message: Unknown\nHeaders: {} - Correlation ID: Not Available - Trace ID: Not Available","timestamp":"2026-03-23T06:26:09.647Z"}
{"level":"error","message":"Error redeeming auth code for a token for resource arm: unknown_error: Error(s): Not Available - Timestamp: Not Available - Description: An unknown error occured.\nHttp status code: NaN\nHttp status message: Unknown\nHeaders: {} - Correlation ID: Not Available - Trace ID: Not Available","timestamp":"2026-03-23T06:26:09.649Z"}
```

**Version:**
- OS: Windows 11 and Windows Server 2025
- Version 2.23.0-stable.1210 (Latest at this time)

**Workaround:**
I applied a workaround based on the [LucasForster's post](https://github.com/AzureAD/microsoft-authentication-library-for-js/issues/8024#issuecomment-3669517926) and build it. It seems to have solved the issue.

- https://github.com/tksh164/BatchExplorer/commit/dbd584c9089d2718e18272d1f5de1e352a23c55d