fix: timing flash + couleur idle LED + diagnostic auto-brightness

backend/services/printer_service.py

@@ -244,7 +244,13 @@ class PrinterService:
         if not Path(filename).exists():
             return {"success": False, "error": f"Fichier introuvable: {filename}"}
 
-        cmd = ["/bin/bash", script, filename, "image", "default", str(copies)]
+        # Imprimantes exclues du load-balancing (flag excluded dans config)
+        excluded_list = ",".join(
+            self._printer_name(p)
+            for p in self._cfg.printers
+            if isinstance(p, dict) and p.get("excluded", False)
+        )
+        cmd = ["/bin/bash", script, filename, "image", "default", str(copies), excluded_list]
         try:
             proc = subprocess.run(
                 cmd, capture_output=True, text=True, timeout=120
@@ -361,11 +367,13 @@ class PrinterService:
         statuses = []
         for p in self._cfg.printers:
             name = self._printer_name(p)
+            excluded = isinstance(p, dict) and bool(p.get("excluded", False))
             status = await asyncio.to_thread(self._get_printer_status, name)
             stats = await self._get_printer_db_stats(name)
             statuses.append({
                 "name": name,
                 "label": self._printer_label(p),
+                "excluded": excluded,
                 **status,
                 **stats,
             })
@@ -619,8 +627,8 @@ class PrinterService:
     async def enable_printer(self, printer_name: str) -> bool:
         """Active l'imprimante CUPS (cupsenable) et accepte les nouveaux jobs."""
         try:
-            r1 = subprocess.run(["cupsenable", printer_name], capture_output=True, timeout=10)
-            r2 = subprocess.run(["cupsaccept", printer_name], capture_output=True, timeout=10)
+            r1 = subprocess.run(["sudo", "cupsenable", printer_name], capture_output=True, timeout=10)
+            r2 = subprocess.run(["sudo", "cupsaccept", printer_name], capture_output=True, timeout=10)
             return r1.returncode == 0 and r2.returncode == 0
         except Exception as e:
             logger.error("Erreur enable printer %s: %s", printer_name, e)
@@ -629,7 +637,7 @@ class PrinterService:
     async def disable_printer(self, printer_name: str) -> bool:
         """Désactive l'imprimante CUPS (cupsdisable)."""
         try:
-            result = subprocess.run(["cupsdisable", printer_name], capture_output=True, timeout=10)
+            result = subprocess.run(["sudo", "cupsdisable", printer_name], capture_output=True, timeout=10)
             return result.returncode == 0
         except Exception as e:
             logger.error("Erreur disable printer %s: %s", printer_name, e)
@@ -638,7 +646,7 @@ class PrinterService:
     async def reject_jobs(self, printer_name: str) -> bool:
         """Refuse les nouveaux jobs (cupsreject) sans stopper l'impression en cours."""
         try:
-            result = subprocess.run(["cupsreject", printer_name], capture_output=True, timeout=10)
+            result = subprocess.run(["sudo", "cupsreject", printer_name], capture_output=True, timeout=10)
             return result.returncode == 0
         except Exception as e:
             logger.error("Erreur reject printer %s: %s", printer_name, e)