Better notification organization.

docs/fenrir.1

@@ -976,13 +976,17 @@ the default theme), waits for the audio output to drain, then speaks the
 message.
 Sound playback runs outside the input loop.
 Missing or failed sound output leaves speech available.
-Speech mute or temporary silence keeps the sound and history, with no
-spoken message.
+The cue plays at most once every 30 seconds across readers for the same
+user.
+Notifications during this cooldown are spoken without another sound or
+sound wait; skipped cues are not queued for later.
+Speech mute or temporary silence keeps history and allows the sound
+under the same cooldown, with no spoken message.
 Recalling a notification does not replay its sound.
 .PP
 \f[B]Fenrir+N\f[R] repeats the most recent notification.
-\f[B]Fenrir+Control+N\f[R] opens a list of the latest 100 notifications
-for this reader session, newest first.
+\f[B]Fenrir+Control+N\f[R] opens a list of the latest 100 shared
+notifications, newest first.
 Each message is followed by its received time, formatted using the
 current Presentation Time and date preference.
 For example, \f[CR]Hello world 01:38 PM\f[R] with 12\-hour time, or
@@ -992,11 +996,32 @@ Use Up/Down to browse, Enter to repeat the selected entry, and Escape or
 the Close button to leave.
 Tab and Shift+Tab move between controls.
 The list is a snapshot; reopen it to include new arrivals.
-History is cleared when the reader exits.
 Notifications received while muted or temporarily silenced are still
 remembered.
 Self\-voicing through \f[CR]command say TEXT\f[R] does not add
 notifications.
+.PP
+History is shared across running readers for the same account on this
+machine.
+Only the targeted reader speaks and plays an eligible cue; the other
+readers receive silent history updates.
+You can recall those messages from any reader.
+The root console reader shares the owner of the active text console\(cqs
+history.
+Switching console users switches histories and closes the previous
+user\(cqs notification dialog.
+While a graphical VT is active, it keeps the last selected console
+account.
+A newly started reader loads existing history silently.
+.PP
+Notification text stays in memory; sharing needs no additional daemon or
+init system service.
+A surviving reader takes over when the coordinating reader exits.
+History clears after the last reader for that account exits.
+A crash can lose the most recent updates if other readers have not
+received them yet.
+All participating copies must run a build with shared notification
+history.
 .SS Socket commands
 Unix socket remote control is enabled by default.
 The standard socket is \f[CR]/tmp/fenrirscreenreader\-daemon.sock\f[R],