Add the PyQt6 GUI: Dashboard, Jobs, VM control, notifications

All VM access goes through remote.py (ssh with a shared ControlMaster,
local virsh). The main window polls jobs, backs off while ssh is down,
checks the libvirt domain and offers Start or Resume, and sends
freedesktop notifications when a job ends or the VM comes up. The Jobs
tab streams a job's log with job-follow and resumes at the last offset
after a drop. Config is TOML, validated against built-in defaults.

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

1 files changed, 41 insertions, 0 deletions

diff --git a/sb_builder/__main__.py b/sb_builder/__main__.py
new file mode 100644
index 0000000..5a78b64
--- /dev/null
+++ b/sb_builder/__main__.py
@@ -0,0 +1,41 @@
+# sb-builder - entry point
+# 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.
+#
+# You should have received a copy of the GNU General Public License along
+# with this program; if not, write to the Free Software Foundation, Inc.,
+# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+
+"""Entry point: python3 -m sb_builder."""
+
+import sys
+
+from PyQt6.QtWidgets import QApplication, QMessageBox
+
+from . import config
+from .mainwindow import MainWindow
+from .remote import Remote
+
+
+def main():
+    app = QApplication(sys.argv)
+    app.setApplicationName("sb-builder")
+    cfg, err = config.load()
+    w = MainWindow(cfg, Remote(cfg))
+    w.resize(1100, 700)
+    w.show()
+    if err:
+        QMessageBox.warning(w, "Config error", f"{err}\nUsing defaults.")
+    return app.exec()
+
+
+if __name__ == "__main__":
+    sys.exit(main())