Session start/stop/extend notifications show title only — no message body

[VolksRat71]

Problem

Session start, stop, and extend notifications display the app name and icon but the message body is missing. Install-time notifications ("Thanks for the download!") work correctly with full body text.

Root Cause (researched)

The -sender flag passed to terminal-notifier is broken on macOS Ventura+ (13+). It causes the notification body to be silently suppressed while the title still renders.

Documented in multiple upstream issues:

• julienXX/terminal-notifier#216 — -sender suppresses banner display
• julienXX/terminal-notifier#301 — -sender hangs on Ventura
• julienXX/terminal-notifier#317 — PR to remove -sender entirely

The -group flag combined with -sender makes it worse — macOS gets confused about which app owns the notification.

Additionally, Notify() runs in a goroutine. For CLI commands that exit immediately (start, stop, extend), the process can exit before terminal-notifier finishes delivering the full notification.

Why install notifications work

The install welcome notification fires via NotifySync() before Awake.app is built, so it falls through to osascript which works reliably.

Proposed fix

In engine/notify.go, for both Notify() and NotifySync():

1. Remove -sender and -group flags from terminal-notifier calls
2. Make Notify() synchronous (remove goroutine) so the process doesn't exit mid-delivery
3. If terminal-notifier still drops bodies after removing -sender, fall back to osascript as primary with Awake.app as a future upgrade path when terminal-notifier gets a Tahoe-compatible release

Environment

• macOS 26.3 (Tahoe)
• terminal-notifier 2.0.0 (Homebrew)
• Awake.app is properly codesigned (Identifier=com.awake.notifier)

Files

• engine/notify.go — Notify() line 158, NotifySync() line 85