Local-server mode + macOS support (auto-detected) — builds on #28

[kylecarbonneau]

Builds on #28 (feat/channels-integration) — this PR is stacked on that branch, so the diff here is just these additions (3 files, +148/−13). Happy to fold them in as commits on #28 directly instead if you'd prefer; once #28 lands on main I'll retarget this to main.

Summary

#28 adds the push-based task-event channel, built for a remote Linux server reached over SSH. This makes the same channel also work when the GM runs on the same machine as the daemon — including macOS — auto-detected, with the remote-Linux/SSH flow left fully intact. Everything is additive; nothing existing is removed.

What changed

1. Channel local mode

templates/channel/taskyou-channel.ts.tmpl — runRemote() gains a LOCAL branch: when SERVER_HOST is local / localhost / empty (IS_LOCAL), commands run via bash -lc directly on this machine (no SSH). Otherwise the original SSH path runs unchanged. ~/.local/bin is prepended to PATH and we cd into SERVER_HOME, mirroring the remote path.

2. Cross-platform hooks directory

setup.sh — the hooks dir was hardcoded to ~/.config/task/hooks, but ty's hooks.DefaultHooksDir() follows Go's os.UserConfigDir():

OS	hooks dir
Linux	~/.config/task/hooks
macOS	~/Library/Application Support/task/hooks

A resolve_hooks_dir helper detects the OS via uname -s and picks the right path. Linux installs are byte-identical; macOS installs now land where the daemon actually looks (previously, hooks placed in ~/.config on a Mac silently never fired).

3. Local-server setup mode

setup.sh — setup_server() detects a local server (SERVER_HOST local/localhost/empty) and delegates to a new setup_server_local() that configures git identity, registers project repos with ty locally, installs hooks to the OS-correct dir, creates notifications.jsonl, and skips SSH provisioning + the systemd service (GM and daemon share the box). The remote-Linux (setup_server) and exe.dev (setup_exe_dev) paths are untouched aside from adopting the OS-aware hooks dir.

Plus config.example.env documents SERVER_HOST=local.

Testing (macOS)

• Rendered channel template compiles — bun build bundles cleanly and tsc --noEmit --strict is clean; the repo's own smoke-test.ts passes against the local render.
• The local bash -lc runner drives ty commands without SSH.
• Hooks install to ~/Library/Application Support/task/hooks and fire on task events.
• Events surface in the GM session via the channel.
• Remote-Linux/SSH path unchanged (additive else branches only — near-zero deletions).

Compatibility

Fully backward-compatible. Existing remote-Linux deployments behave exactly as before; the new behavior only engages when SERVER_HOST is local/localhost/empty or the target OS is macOS.