Add status page quick actions

Co-authored-by: Copilot <[email protected]>

modules/app_status.py

@@ -1,6 +1,7 @@
 import os
 import subprocess
 import time
+from threading import Thread
 from urllib.parse import urlparse
 
 import requests
@@ -22,6 +23,14 @@ SERVICE_UNITS = (
     ("Hotspot watcher", "yaris-netwatch.timer"),
     ("Phone uplink wait", "yaris-uplink-wait.service"),
 )
+RESTART_COMMAND = [
+    "sudo",
+    "-n",
+    "/usr/bin/systemctl",
+    "restart",
+    "--no-block",
+    "yaris-obd.service",
+]
 
 
 def parse_systemctl_show(text):
@@ -41,6 +50,45 @@ def parse_systemctl_show(text):
     }
 
 
+def _run_restart_command():
+    subprocess.run(
+        RESTART_COMMAND,
+        capture_output=True,
+        text=True,
+        timeout=10,
+        check=True,
+    )
+
+
+def _delayed_restart(delay_seconds):
+    time.sleep(delay_seconds)
+    try:
+        _run_restart_command()
+    except (OSError, subprocess.SubprocessError) as error:
+        print(f"Could not restart yaris-obd.service from status page: {error}")
+
+
+def request_app_restart():
+    try:
+        subprocess.run(
+            ["sudo", "-n", "-l", *RESTART_COMMAND[2:]],
+            capture_output=True,
+            text=True,
+            timeout=5,
+            check=True,
+        )
+    except (OSError, subprocess.SubprocessError) as error:
+        raise RuntimeError(
+            "Restart permission is not installed on this Pi yet. "
+            "Run deploy/install_service.sh once to install the status-action sudoers file."
+        ) from error
+    Thread(target=_delayed_restart, args=(1,), daemon=True).start()
+    return {
+        "status": "restart_scheduled",
+        "message": "App restart requested. The page may disconnect for a few seconds.",
+    }
+
+
 def _systemd_unit_status(label, unit):
     try:
         result = subprocess.run(