feat(omo): notify plain Ghostty tabs about omo sessions on flowstate-remote

Running fs in a plain Ghostty tab left the Mac silent: no local tmux reads the title, and the server tagged its pushes attached, so the ntfy agent skipped them. The agent now skips an attached push only when a tmux pane here recorded that exact event through its title, waiting up to three seconds for it; otherwise it plays the sound and posts the banner. The banner comes from the plain tab whose mosh-client uses the port the server tags (mosh-<port>), so clicking it lands on the right tab, and sessions whose tab closed while their mosh-server lingers still notify.

The server's title now reads marker first (🟢 studio · omo:done:<time>), so a plain tab shows the state at a glance; omo-remote parses that format.

README.md

@@ -231,7 +231,7 @@ Custom scripts and binaries are stored in `.local/bin/`:
 - `tmux-open-path`: Backs tmux's Ctrl+click. Takes the path under the mouse, strips `:line:col`, `#L10`, `@` and `file://`, resolves it against the pane's directory and then its git root, and routes it by type: markdown to Markdown Preview (`cask "markdown-preview"` in `Brewfile.apps`), images, PDFs and directories to yazi, the rest to nvim
 - `omo-notify`: Sound, tab marker and notification for OmO's hooks. Ghostty posts the notification, so clicking it opens the session's tab and pane
 - `omo-status`: Coloured marker in front of the Ghostty tab title for each tmux session running omo: 🔴 stopped with an error, 🟡 waiting for your answer, 🟢 finished, 🔵 working. A tab with several agents shows the most urgent one; focusing the tab clears red, amber and green, and undoes any title you gave the tab by hand so it always shows its session name
-- `omo-remote`: The same sound, tab marker and notification for omo sessions on a remote server (flowstate-remote). The server's `omo-notify` (kept on the server in `~/.local/bin`, not in this repository) writes the session's state into its terminal title as `omo:<state>:...`. mosh drops notifications but carries titles, and so does ssh, so tmux's `pane-title-changed` hook passes the event to `omo-notify` for the pane running mosh or ssh. A session that no terminal is showing reaches you through ntfy instead: `omo-remote install` starts a launchd agent that subscribes to the topic and plays the sound and posts the notification for omo pushes. The server tags a push `attached` when the title already reached a terminal, and the agent skips those so nothing arrives twice. The agent reads `NTFY_URL`, `NTFY_TOPIC` and `NTFY_TOKEN` from `~/.config/ntfy/omo-remote.env` (chmod 600, not in this repository) and needs `brew "ntfy"`
+- `omo-remote`: The same sound, tab marker and notification for omo sessions on a remote server (flowstate-remote). The server's `omo-notify` (kept on the server in `~/.local/bin`, not in this repository) writes the session's state into its terminal title, marker first (`🟢 studio · omo:done:...`). mosh drops notifications but carries titles, and so does ssh, so tmux's `pane-title-changed` hook passes the event to `omo-notify` for the pane running mosh or ssh. Everything else reaches you through ntfy: `omo-remote install` starts a launchd agent that subscribes to the topic and plays the sound and posts the notification for omo pushes, unless a tmux pane here already handled that event through its title, so nothing arrives twice. That covers sessions no terminal is showing and `fs` in a plain Ghostty tab, whose title shows the marker and which posts the notification itself (the coloured tab marker needs tmux). The agent reads `NTFY_URL`, `NTFY_TOPIC` and `NTFY_TOKEN` from `~/.config/ntfy/omo-remote.env` (chmod 600, not in this repository) and needs `brew "ntfy"`
 - `docker-nuke`: Force-restart a wedged Docker Desktop, capturing diagnostics to `~/.local/state/docker-nuke/` first (`--dry-run` to preview, `--no-restart` to leave it down, `--deep` for root helpers)
 
 The `links` step of `setup-mac.sh` links each script into `~/.local/bin`, which `.zshrc` puts on your PATH. `pbcopy` and `pbpaste` are OSC 52 clipboard shims for headless servers, so they are not linked on macOS.