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, 15 insertions, 2 deletions

diff --git a/desktop/modules/mail/MailPage.qml b/desktop/modules/mail/MailPage.qml
index 85b0876..1b41412 100644
--- a/desktop/modules/mail/MailPage.qml
+++ b/desktop/modules/mail/MailPage.qml
@@ -97,6 +97,7 @@ Column {
         model: Accounts.accounts
 
         Column {
+            id: account
             required property var modelData
             width: page.width
             spacing: 4
@@ -105,6 +106,12 @@ Column {
                 width: parent.width
                 implicitHeight: 26
 
+                MouseArea {
+                    anchors.fill: parent
+                    cursorShape: Qt.PointingHandCursor
+                    onClicked: { Accounts.open(modelData.key); page.close(); }
+                }
+
                 Rectangle {
                     id: dot
                     anchors.verticalCenter: parent.verticalCenter
@@ -132,12 +139,13 @@ Column {
                 }
             }
 
-            // The newest three unread threads. Read-only: qtmaildir takes no
-            // arguments, so there is no way to ask it for a particular thread.
+            // The newest three unread threads. A click opens the thread's
+            // newest unread message, in this account.
             Repeater {
                 model: modelData.threads
 
                 Column {
+                    id: row
                     required property var modelData
                     width: page.width - 18
                     x: 18
@@ -177,6 +185,11 @@ Column {
                         font.family: Theme.fontFamily
                         font.pixelSize: Theme.fontSize - 2
                     }
+
+                    // Handlers, not a MouseArea: a Column would lay one out
+                    // as a row of its own rather than let it fill.
+                    HoverHandler { cursorShape: Qt.PointingHandCursor }
+                    TapHandler { onTapped: { Accounts.open(account.modelData.key, row.modelData.thread); page.close(); } }
                 }
             }
         }