CLI: alw swap now is case-sensitive on --from/--to chain IDs (inconsistent with quote and pair)

[moorsecopers99]

Description

Severity: S3 (UX — gratuitous rejection of a reasonable invocation)

Location: allways/cli/swap_commands/swap.py:603-608

if from_chain_opt and from_chain_opt not in SUPPORTED_CHAINS:
    console.print(f'[red]Unknown source chain: {from_chain_opt}[/red]')
    return
if to_chain_opt and to_chain_opt not in SUPPORTED_CHAINS:
    console.print(f'[red]Unknown destination chain: {to_chain_opt}[/red]')
    return

SUPPORTED_CHAINS keys are lowercase (chains.py:40-43). Sister commands already lowercase before validating:

• quote.py:40-41 — from_chain = from_chain.lower()
• pair.py:93,106 — src_chain = src_chain.lower()

Only alw swap now is case-sensitive — inconsistent and unfriendly. Users typing the chain ticker as BTC / TAO is reasonable and supported elsewhere.

Steps to reproduce

1. alw swap now --from BTC --to TAO --amount 0.001

Expected behaviour

• Same as alw swap quote --from BTC --to TAO --amount 0.001: chain IDs lowercased, command proceeds.

Actual behaviour

• [red]Unknown source chain: BTC[/red] and exits.

Fix

• One-liner before the validation block:

  if from_chain_opt:
      from_chain_opt = from_chain_opt.lower()
  if to_chain_opt:
      to_chain_opt = to_chain_opt.lower()