fix(daemon): start metrics loop + bypass TRCC_DAEMON fork bomb

run_daemon() now calls trcc.start_metrics_loop() so the 50ms tick
drives LCD/LED frames — without it the device shows a frozen/blank
screen in daemon mode.

_build_trcc() passes an explicit PlatformFactory.current() to
_boot_trcc() so the daemon-proxy short-circuit is skipped. With
TRCC_DAEMON=1 inherited and no explicit platform, _boot.trcc() called
ensure_daemon() before the socket was bound, spawning another daemon
process — infinite fork chain (upstream issue #162).

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: TuxLux40

src/trcc/daemon.py

@@ -67,6 +67,12 @@ def run_daemon(*, verbosity: int = 0) -> int:
     qapp = _build_qapp()
     trcc = _build_trcc()
 
+    # Start the 50ms tick + sensor-poll loop. Without this nothing drives
+    # the LED segment display / LCD frames in daemon mode and the device
+    # shows a frozen / blank screen. Safe because _build_trcc() builds with
+    # an explicit platform, so system_svc is injected.
+    trcc.start_metrics_loop()
+
     # Renderer flows through so ``Topic.FRAME`` surface payloads get
     # encoded into a JSON-safe envelope before reaching TrccProxy clients.
     server = IPCServer(trcc=trcc, renderer=trcc.renderer)
@@ -179,7 +185,12 @@ def _build_trcc() -> Any:
     set, and theme/data callables injected.
     """
     from ._boot import trcc as _boot_trcc
-    return _boot_trcc(discover_now=True)
+    from .adapters.system import PlatformFactory
+    # Pass an explicit platform so _boot.trcc() skips the daemon-proxy
+    # short circuit. With platform=None and TRCC_DAEMON=1 inherited, that
+    # branch calls ensure_daemon() before our own socket is bound, which
+    # spawns another `trcc daemon` → fork bomb (upstream issue #162).
+    return _boot_trcc(PlatformFactory.current(), discover_now=True)
 
 
 # Module-level holder so the Qt heartbeat timer survives past the function