[FR] Add ability to disable WiFi via SSID configuration

[Copilot]

This PR implements the ability to completely disable WiFi functionality by setting the SSID to special values, addressing the need to eliminate unnecessary WiFi signals that could interfere with other devices.

Implementation

When the SSID is set to either an empty string "" or "none", the SmartSpin2k will:

• Skip WiFi radio initialization entirely
• Disable HTTP server startup
• Skip firmware update checks over WiFi
• Set internetConnection flag to false
• Log appropriate messages indicating WiFi is disabled

BLE functionality remains fully operational for device configuration and control when WiFi is disabled.

Usage

Users can disable WiFi through the SmartSpin2K companion app by:

1. Connecting via Bluetooth
2. Setting the SSID field to blank or "none"
3. Saving the configuration

The setting persists across device reboots and can be re-enabled by setting a valid SSID.

Technical Details

The implementation adds WiFi disable checks to key functions:

• startWifi() - Returns early when WiFi disabled
• stopWifi() - Handles case where WiFi was never started
• HTTP_Server::start() - Skips server initialization
• HTTP_Server::FirmwareUpdate() - Skips update checks
• HTTP_Server::webClientUpdate() - Skips client handling

All WiFi-dependent components safely handle the disabled state, and existing functionality remains unchanged when WiFi is enabled.

Fixes #613.

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• api.registry.nm1.platformio.org
  • Triggering command: /usr/bin/python /home/REDACTED/.local/bin/pio test -e native -v (dns block)
  • Triggering command: /usr/bin/python /home/REDACTED/.local/bin/pio check --pattern=src/HTTP_Server_Basic.cpp --environment=native (dns block)
• api.registry.platformio.org
  • Triggering command: /usr/bin/python /home/REDACTED/.local/bin/pio test -e native -v (dns block)
  • Triggering command: /usr/bin/python /home/REDACTED/.local/bin/pio check --pattern=src/HTTP_Server_Basic.cpp --environment=native (dns block)
• collector.platformio.org
  • Triggering command: /usr/bin/python /home/REDACTED/.local/bin/pio test -e native -v (dns block)
  • Triggering command: /usr/bin/python /home/REDACTED/.local/bin/pio check --pattern=src/HTTP_Server_Basic.cpp --environment=native (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

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