The web-install feature was carrying nine pedantic-tier clippy errors
from its initial commit. Fix them in place:
- \`install.rs\` \`InstallAppState\` switches \`install_token\`,
\`storage_dir\`, and \`config_path\` from \`Arc<String>/Arc<PathBuf>\` to
\`Arc<str>/Arc<Path>\` so we stop heap-duplicating buffers.
- Bring \`Infallible\`, \`axum::middleware\`, \`axum::extract::Request\`,
and \`fabro_types::settings::SettingsLayer\` into scope instead of
using absolute paths inline.
- Replace \`Duration::from_secs(10 * 60)\` with \`Duration::from_mins(10)\`.
- \`generate_ephemeral_secret\` never returns \`Err\`; drop the \`Result\`.
- \`server/start.rs ensure_storage_server_autostart_allowed\` takes
\`Option<&OsStr>\` instead of consuming an \`OsString\` it only reads.
- \`server/mod.rs\` storage_dir fallback uses \`map_or_else\` to satisfy
\`map_unwrap_or\`.
CI now passes \`cargo +nightly-2026-04-14 clippy --workspace
--all-targets -- -D warnings\` cleanly and the 892-test suite still
passes.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>