session logging, build-only mode, park splash, boot logo spinner

- Per-process stderr logging to /data/log2/{session}/ with time-safe
  directory naming (boot-xxx renamed once GPS/NTP sets clock)
- Aggregate session.log with major events (start/stop, transitions)
- 30-day log rotation cleanup on manager startup
- build_only.sh: compile without starting manager, non-blocking error
  display, kills stale processes
- build.py: copies updated spinner binary after successful build
- Onroad park mode: show splash screen when car is on but in park,
  switch to camera view when shifted to drive, honor screen on/off
- Spinner: full-screen boot logo background from /usr/comma/bg.jpg
  with white progress bar overlay
- Boot logo: auto-regenerate when boot_logo.png changes, 140% scale
- launch_openpilot.sh: cd to /data/openpilot for reliable execution
- launch_chffrplus.sh: kill stale text error displays on startup
- spinner shell wrapper: prefer freshly built _spinner over prebuilt

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

selfdrive/manager/manager.py

@@ -16,7 +16,7 @@ from openpilot.common.text_window import TextWindow
 from openpilot.common.time import system_time_valid
 from openpilot.system.hardware import HARDWARE, PC
 from openpilot.selfdrive.manager.helpers import unblock_stdout, write_onroad_params, save_bootlog
-from openpilot.selfdrive.manager.process import ensure_running
+from openpilot.selfdrive.manager.process import ensure_running, update_log_dir_timestamp, session_log
 from openpilot.selfdrive.manager.process_config import managed_processes
 from openpilot.selfdrive.athena.registration import register, UNREGISTERED_DONGLE_ID
 from openpilot.common.swaglog import cloudlog, add_file_handler
@@ -51,7 +51,26 @@ def frogpilot_boot_functions(frogpilot_functions):
   except Exception as e:
     print(f"An unexpected error occurred: {e}")
 
+def cleanup_old_logs(max_age_days=30):
+  """CLEARPILOT: delete session log directories older than max_age_days."""
+  import shutil
+  log_base = "/data/log2"
+  if not os.path.exists(log_base):
+    return
+  cutoff = time.time() - (max_age_days * 86400)
+  for entry in os.listdir(log_base):
+    path = os.path.join(log_base, entry)
+    if os.path.isdir(path):
+      if os.path.getmtime(path) < cutoff:
+        try:
+          shutil.rmtree(path)
+        except OSError:
+          pass
+
+
 def manager_init(frogpilot_functions) -> None:
+  cleanup_old_logs()
+
   frogpilot_boot = threading.Thread(target=frogpilot_boot_functions, args=(frogpilot_functions,))
   frogpilot_boot.start()
 
@@ -367,6 +386,7 @@ def manager_thread(frogpilot_functions) -> None:
   cloudlog.bind(daemon="manager")
   cloudlog.info("manager start")
   cloudlog.info({"environ": os.environ})
+  session_log.info("manager starting")
 
   params = Params()
   params_memory = Params("/dev/shm/params")
@@ -397,6 +417,7 @@ def manager_thread(frogpilot_functions) -> None:
 
     if started and not started_prev:
       params.clear_all(ParamKeyType.CLEAR_ON_ONROAD_TRANSITION)
+      session_log.info("onroad transition")
 
       if openpilot_crashed:
         os.remove(os.path.join(sentry.CRASHES_DIR, 'error.txt'))
@@ -404,6 +425,7 @@ def manager_thread(frogpilot_functions) -> None:
     elif not started and started_prev:
       params.clear_all(ParamKeyType.CLEAR_ON_OFFROAD_TRANSITION)
       params_memory.clear_all(ParamKeyType.CLEAR_ON_OFFROAD_TRANSITION)
+      session_log.info("offroad transition")
 
     # update onroad params, which drives boardd's safety setter thread
     if started != started_prev:
@@ -413,6 +435,9 @@ def manager_thread(frogpilot_functions) -> None:
 
     ensure_running(managed_processes.values(), started, params=params, CP=sm['carParams'], not_run=ignore)
 
+    # CLEARPILOT: rename log directory once system time is valid
+    update_log_dir_timestamp()
+
     running = ' '.join("{}{}\u001b[0m".format("\u001b[32m" if p.proc.is_alive() else "\u001b[31m", p.name)
                        for p in managed_processes.values() if p.proc)
     print(running)
@@ -430,6 +455,7 @@ def manager_thread(frogpilot_functions) -> None:
         shutdown = True
         params.put("LastManagerExitReason", f"{param} {datetime.datetime.now()}")
         cloudlog.warning(f"Shutting down manager - {param} set")
+        session_log.info("manager shutting down: %s", param)
 
     if shutdown:
       break
@@ -481,6 +507,7 @@ if __name__ == "__main__":
   except Exception:
     add_file_handler(cloudlog)
     cloudlog.exception("Manager failed to start")
+    session_log.critical("manager failed to start: %s", traceback.format_exc())
 
     try:
       managed_processes['ui'].stop()