Live testing against an AmneziaWG 2.0 server revealed the actual root cause
of "Failed to generate client keys": the official Amnezia container image
ships the userspace tool only as `wg` (a patched AmneziaWG binary) and has
NO `awg` binary, while the panel hardcoded `awg` for AWG2. `awg genkey` then
failed with "sh: awg: not found". (amneziawg-go ships `awg` with `wg`
symlinked, so both names work there — but the Amnezia image does not.)
- generateClientKeys(): detect the tool inside the container
(`command -v awg || command -v wg`) instead of hardcoding `awg`.
- addClientToServer(): resolve the tool via new resolveWgTool() helper so
`wg set` / `wg-quick up` (peer apply) also work on the Amnezia image.
- executeServerCommand(): delegate to VpnServer::executeCommand so SSH key
auth + docker sudo auto-detection apply to all 19 call sites (it was
password-only before).
Verified end-to-end on a live AWG2 server: pre-fix code fails with
"Failed to generate client keys: sh: awg: not found"; fixed code creates
the client, generates keys, and the peer appears in `wg show wg0`.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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