Reduce memory footprint of version compatibility popup

[Copilot]

Description

Version compatibility warning popup consumed excessive memory through verbose HTML messages and redundant logging. On ESP32 devices with limited RAM, this triggered low memory warnings.

Fixes #(issue)

Changes

Simplified popup message (www/js/connectdlg.js)

• Reduced message from 396 to 217 bytes (45% reduction)
• Consolidated multi-paragraph HTML to single concise line
• Shortened title: "Version Compatibility Warning" → "Version Warning"

Removed redundant logging

• 3 console.log/warn statements
• 4 addMessage serial log calls

Before/After

// Before: 396 bytes
const warningTitle = "Version Compatibility Warning";
const warningMessage = `<p><strong>Firmware and WebUI versions may not be compatible:</strong></p>
    <p>• Firmware version: <code>${fw_version}</code></p>
    <p>• WebUI version: <code>${web_ui_version}</code></p>
    <p><br/>This may cause unexpected behavior...`;

// After: 217 bytes
const warningMessage = `<p><strong>Version mismatch:</strong> FW: ${fw_version}, UI: ${web_ui_version}<br/>Update to matching versions for best compatibility.</p>`;
alertdlg("Version Warning", warningMessage);

Build size impact: 131.49 kB → 131.23 kB compressed (-260 bytes)

Screenshot

Note: Issue mentioned "new release" popups but none exist in codebase. Only version compatibility popup addressed.

Type of change

• Bug fix (non-breaking change which fixes an issue)

Checklist:

• I have thoroughly tested this on hardware and these changes do not break any existing functionality. This is important!
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• Any dependent changes have been merged and published in downstream modules

Original prompt

---

This section details on the original issue you should resolve

<issue_title>popup wantings cause memory warnings</issue_title>
<issue_description>the popups for version incompatibilities and new releases are causing low memory warnings, find a way to reduce the memory footprint of these alerts.</issue_description>

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

• Fixes popup wantings cause memory warnings #266

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[davidelang]

this has too much overlap with other work, closing