mail: open accounts and messages in qtmaildir from the drawer and notifications

qtmaildir now takes --account, --thread and --message, and hands them to
a running window over its socket, so the drawer and the notifications can
open the exact thing they show instead of just launching the client.

mail-open.sh is the one place that turns an account and a thread into
selectors, shared by both callers. It looks up the thread's newest unread
message at click time rather than when the row or notification was built:
by then it may have been read, and an empty lookup falls back to the whole
thread instead of a miss in qtmaildir's status bar.

The notification never had a working click: dunstify is not installed, so
mail-notify.sh always took its notify-send fallback, which carried no
action. It now uses notify-send -A NAME=Text, one action per listed thread
(keyed by thread id, which is hex and so never holds the "=" separator)
plus the account as default. The round trip through notifyd was checked:
notifyctl action makes notify-send print the picked name.

On the page, the account header opens the account and a thread row its
newest unread message. Rows use TapHandler and HoverHandler because a
MouseArea cannot fill a Column. Launches are detached: a first launch is
the client itself, and the old reused Process would have killed it on the
next click. Opening anything now closes the drawer rather than going back.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

1 files changed, 46 insertions, 0 deletions

diff --git a/desktop/modules/mail/mail-open.sh b/desktop/modules/mail/mail-open.sh
new file mode 100755
index 0000000..90877bd
--- /dev/null
+++ b/desktop/modules/mail/mail-open.sh
@@ -0,0 +1,46 @@
+#!/bin/bash
+#
+# Copyright (C) 2026 Danilo M. <danix@danix.xyz>
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License version 2 as
+# published by the Free Software Foundation.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# Opens qtmaildir on an account, or on a thread's newest unread message.
+# Shared by the drawer's mail page and mail-notify.sh, so both open mail the
+# same way.
+#
+#   mail-open.sh <account-key> [thread-id]
+#
+# A running qtmaildir takes the selectors over its socket and raises, so this
+# never opens a second window.
+#
+# The message is looked up at click time rather than when the row or the
+# notification was built: by then it may have been read, and an unread-only
+# lookup that finds nothing falls back to the whole thread instead of a miss.
+# Newest, because that is the message the row's date and the notification
+# are about.
+
+set -u
+
+key="${1:?usage: mail-open.sh <account-key> [thread-id]}"
+tid="${2:-}"
+args=(--account "$key")
+
+# notmuch thread ids are hex; anything else never reaches a query.
+if [[ "$tid" =~ ^[0-9a-f]+$ ]]; then
+    id="$(notmuch search --format=json --output=messages --sort=newest-first --limit=1 \
+            "thread:$tid and tag:unread and tag:inbox" 2>/dev/null | jq -r '.[0] // empty' 2>/dev/null)"
+    if [[ -n "$id" ]]; then
+        args+=(--message "$id")
+    else
+        args+=(--thread "$tid")
+    fi
+fi
+
+exec "$HOME/bin/qtmaildir" "${args[@]}"