Enhance get_channels_with_hash()

[SpudGunMan]

To set the index 0 name to the preset name from localConfig.lora.modem_preset when empty

and compute hash so the output will not have bad index0 name or hash, also removes all disabled for clarity.

This outputs Device1 Channel Hash Table: [{'index': 0, 'role': 'PRIMARY', 'name': 'LongFast', 'hash': 8} for a LongFast

[ianmcorvidae]

A couple of issues here -- the generated names won't always be right as-is and this needs to be done for secondary channels too. But a good change in general/otherwise

[ianmcorvidae]

This isn't quite correct, because not every preset uses the full name for this. You can see what names firmware uses at https://github.com/meshtastic/firmware/blob/7212fb9caa15119c500edb3a074a5bc6b956605d/src/DisplayFormatters.cpp#L3-L41

Primarily it's just LONG_MODERATE though, and that the name Custom is used if a modem preset isn't in use.

[SpudGunMan]

is this too bulky? or should be in util?

MODEM_PRESET_DISPLAY_NAMES = {
    "SHORT_TURBO": ("ShortTurbo", "ShortT"),
    "SHORT_SLOW": ("ShortSlow", "ShortS"),
    "SHORT_FAST": ("ShortFast", "ShortF"),
    "MEDIUM_SLOW": ("MediumSlow", "MedS"),
    "MEDIUM_FAST": ("MediumFast", "MedF"),
    "LONG_SLOW": ("LongSlow", "LongS"),
    "LONG_FAST": ("LongFast", "LongF"),
    "LONG_MODERATE": ("LongMod", "LongM"),
}

def format_preset_name(name=None, use_short_name=False):
    # Returns a user-friendly display name for a given preset.
    if name is None:
        return "Custom"
    # Normalize input: extract the preset part from full enum string
    if isinstance(name, str):
        parts = name.split('_')
        # Find the preset part (e.g., LONG_FAST)
        for i in range(len(parts)):
            key = '_'.join(parts[i:])
            if key in MODEM_PRESET_DISPLAY_NAMES:
                names = MODEM_PRESET_DISPLAY_NAMES[key]
                return names[1] if use_short_name else names[0]
    return "Invalid"