feat(desktop): move mail-overview in as the mail module

Accounts.qml is unchanged and MailPanel's body becomes the page. The
three scripts move with it, which changes the absolute paths in autostart
and in the waybar module; both are outside this repo and listed in the
plan's final task. Button.qml, byte-identical here and in vm-manager,
lands at the shell root as the single copy.

1 files changed, 68 insertions, 0 deletions

diff --git a/desktop/modules/mail/waybar-mail.sh b/desktop/modules/mail/waybar-mail.sh
new file mode 100755
index 0000000..4942f54
--- /dev/null
+++ b/desktop/modules/mail/waybar-mail.sh
@@ -0,0 +1,68 @@
+#!/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.
+#
+# Waybar custom module in continuous mode: prints one JSON line per notmuch
+# commit, forever, and waybar redraws on each line. Waybar owns this process,
+# which is why there is no daemon to supervise and no interval to tune.
+#
+# The count is the total across every account. A per account breakdown is the
+# drawer's job; see modules/mail/README.md.
+
+set -u
+
+QUERY='tag:unread and tag:inbox'
+
+# notmuch knows where its own database is, so this follows a moved database
+# without an edit here.
+db="$(notmuch config get database.path 2>/dev/null)/xapian"
+
+emit() {
+    local n
+    n="$(notmuch count "$QUERY" 2>/dev/null)"
+
+    # The output is the test, not the exit status. notmuch fails two different
+    # ways: a rejected query prints nothing and exits 1, while a query Xapian
+    # merely misparses ('tag:unread and ((') returns a plausible wrong number
+    # and exits 0. Only the first is detectable, and it is the one that matters
+    # here, because empty output would otherwise render as "no new mail". The
+    # second is why QUERY is a fixed string and not built from anything.
+    if [[ ! "$n" =~ ^[0-9]+$ ]]; then
+        printf '{"text":"!","tooltip":"notmuch count failed","class":"error"}\n'
+        return
+    fi
+
+    if [[ "$n" -eq 0 ]]; then
+        printf '{"text":"","class":"empty"}\n'
+    else
+        printf '{"text":"%s","class":"unread"}\n' "$n"
+    fi
+}
+
+if [[ ! -d "$db" ]]; then
+    printf '{"text":"!","tooltip":"no notmuch database","class":"error"}\n'
+    exit 1
+fi
+
+emit
+
+while inotifywait -qq -e close_write,moved_to "$db" 2>/dev/null; do
+    # One commit touches several files. Without this the module redraws three
+    # or four times per sync with intermediate counts.
+    sleep 0.3
+    emit
+done
+
+# Falling out of the loop means inotifywait itself failed. Say so rather than
+# exiting silently, which looks like an empty inbox.
+printf '{"text":"!","tooltip":"mail watcher stopped","class":"error"}\n'
+exit 1