[NgoQuocViet2001]

With --handle-input, commands without a name were still registered as input targets under the empty string. Any input line starting with : therefore matched the empty prefix. It went to the last unnamed command with its leading colon stripped, instead of going unchanged to the default target. This has been the behaviour for a long time. It affects the default case (no --names), a single unnamed command, and partial --names lists where some commands get no name.

Before: concurrently -i "iex -S mix phx.server" "npm run watch", then type :observer.start(). npm run watch receives observer.start() and iex receives nothing.
After: iex receives :observer.start().

This change registers a command under its name only when it has one, in line with docs/cli/input-handling.md ("If the command has a name"). Targeting by index or by a real name works as before.

• Ran: pnpm test with the new input-handler case. It fails on main and passes with this change. The rest of the suite passes, except the "is of success when a SIGINT is sent" test in bin/index.spec.ts, which also fails on main on Windows.
• Checked: pnpm run lint and pnpm run typecheck are clean.

[coveralls]

coverage: 98.722% (+0.003%) from 98.719% — NgoQuocViet2001:fix-input-empty-name into open-cli-tools:main