Suppress usage reporting in AP mode

[Copilot]

Usage reporting attempts to contact usage.wled.me during AP mode when no internet connectivity exists.

Changes

Added IP address check in checkVersionUpgrade() to skip version reporting when device is in AP mode:

function checkVersionUpgrade(info) {
	if (versionCheckDone) return;
	versionCheckDone = true;

	// Skip version check in AP mode (no internet connectivity)
	if (!info.ip || info.ip === '0.0.0.0') {
		console.log('Skipping version check in AP mode (no IP address)');
		return;
	}

	// Fetch version-info.json...

When Network.isConnected() is false, info.ip returns empty string (see json.cpp:1272). This check prevents the upgrade dialog from appearing when connectivity is unavailable.

Original prompt

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This section details on the original issue you should resolve

<issue_title>Usage reporting trigger during ap mode</issue_title>
<issue_description>The upgrade usage reporting should be suppressed during ap mode as there will be no connectivity to the usage server</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes Usage reporting trigger during ap mode #334

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