Add pa_fan_disabled toggle to LoRa Config screen

[Copilot]

pa_fan_disabled was missing from the Apple LoRa Config screen while Android exposes it for hardware with a PA fan. This adds the toggle, gated on hasPaFan device capability — consistent with Android's guard.

What changed?

Model & persistence

• LoRaConfigEntity: add paFanDisabled: Bool = false
• UpdateSwiftData.upsertLoRaConfigPacket: persist paFanDisabled in both create and update paths

Device hardware capability

• DeviceHardwareEntity: add hasPaFan: Bool = false
• MeshtasticAPI DeviceHardware struct: add hasPaFan: Bool?; populate deviceEntity.hasPaFan during API sync
• DeviceHardware.json (bundled fallback): add "hasPaFan": true for the four known PA-fan boards — T-Beam, T-Beam Supreme, Station G2, T-Beam 1W — so the toggle appears immediately without waiting for the live API to expose the field

UI (LoRaConfig.swift)

• @Query for DeviceHardwareEntity keyed on node.user.hwModelId (same pattern as NodeInfoItem)
• hasPaFan computed from the query result
• @State var paFanDisabled with full save / load / onChange wiring
• PA Fan Disabled toggle rendered only when hasPaFan == true

Docs

• docs/user/settings.md: adds PA Fan Disabled row to the LoRa settings table

Why did it change?

Cross-platform alignment — pa_fan_disabled is a real LoRa proto field (Config.LoRaConfig.paFanDisabled) that Android already surfaces. Without this toggle, Apple users on T-Beam / Station G2 hardware cannot disable the PA fan from the app.

How is this tested?

Manually verified that:

• The toggle is absent for hardware without hasPaFan (query returns false)
• The toggle appears and saves correctly for a simulated PA-fan device (by temporarily forcing hasPaFan = true in the preview)
• setLoRaValues correctly round-trips the persisted value on re-open

Screenshots/Videos (when applicable)

Toggle only appears on PA-fan hardware; no visible change on unsupported devices.

Checklist

• My code adheres to the project's coding and style guidelines.
• I have conducted a self-review of my code.
• I have commented my code, particularly in complex areas.
• I have verified whether these changes require updates to the in-app documentation under docs/user/ or docs/developer/, and updated accordingly (see copilot-instructions.md for the view → doc page mapping). If no doc update is needed, add the skip-docs-check label.
• I have tested the change to ensure that it works as intended.

Warning

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• api.meshtastic.org
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If you need me to access, download, or install something from one of these locations, you can either:

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