Keep local server targeting based on explicit server targets instead of
implicitly deriving a socket from storage_dir. This makes ~/.fabro/fabro.sock
the default local socket again, keeps storage under ~/.fabro/storage, threads
FABRO_CONFIG through server autostart paths, and updates the CLI test harness
for the new split.
Move --storage-dir and --server-url off GlobalArgs and onto the
leaf commands that actually honor them.
This aligns help, parser behavior, and env-var wiring with the
current command architecture while preserving the intended model
and exec targeting semantics.
The server subcommand and related code were gated behind
cfg(feature = "server"). This removes the feature flag entirely,
making fabro-server a required dependency so the server command
is always available.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
