Initial commit: aplicatie de cantarire si etichetare

Aplicatie Flask + SQLite pentru productie alimentara: cantarirea
componentelor unui produs finit si tiparirea etichetei prin QZ Tray.

- produse finite (retete) formate din componente cantarite
- designer vizual de etichete (mm/px, zona sigura, campuri variabile,
  cod QR cu continut din mai multe bucati)
- legare produs finit -> sablon de eticheta
- navigare pe doua taburi: Cantarire / Setari
- administrare: componente, produse finite, sabloane, campuri, istoric
- backup, resetare baza de date, checklist de pregatire, /healthz
- CLI de administrare si serviciu systemd pentru productie
- vendor/syncpulse-scale-bridge (GPL-3.0-or-later) pentru citirea cantarului

tests/test_scale_integration.py

@@ -0,0 +1,54 @@
+"""Integrare reala cu pachetul vendorizat `scale_bridge` (cântar simulat)."""
+from __future__ import annotations
+
+import sys
+from pathlib import Path
+
+ROOT = Path(__file__).resolve().parent.parent
+VENDOR = ROOT / "vendor" / "syncpulse-scale-bridge"
+if str(VENDOR) not in sys.path:
+    sys.path.insert(0, str(VENDOR))
+
+from cantarire.scale import ScaleService  # noqa: E402
+from scale_bridge.config import Config as BridgeConfig  # noqa: E402
+
+
+def test_scale_service_reads_simulated_scale(tmp_path):
+    bridge_config = tmp_path / "bridge.json"
+    config = BridgeConfig(bridge_config)
+    config.save_profile({
+        "name": "sim-toledo",
+        "label": "Simulator Toledo",
+        "port": "COM90",
+        "protocol": "toledo_cont",
+        "serial": {"port": "COM90", "baudrate": 9600, "bytesize": 8,
+                   "parity": "N", "stopbits": 1},
+    })
+
+    service = ScaleService(bridge_config, simulate="toledo_cont")
+    try:
+        assert service.available, service.error
+        names = [p["name"] for p in service.profiles()]
+        assert names == ["sim-toledo"]
+
+        result = service.read("sim-toledo", max_age_ms=3000, wait_ms=5000)
+        assert result["ok"] is True, result
+        assert result["value"] is not None
+        assert result["unit"] == "kg"
+        assert result["profile"] == "sim-toledo"
+        assert result["port"] == "COM90"
+        assert result["raw_hex"]
+    finally:
+        service.close()
+
+
+def test_scale_service_without_profiles(tmp_path):
+    bridge_config = tmp_path / "bridge.json"
+    BridgeConfig(bridge_config)
+    service = ScaleService(bridge_config)
+    try:
+        result = service.read("")
+        assert result["ok"] is False
+        assert "profil" in result["error"].lower()
+    finally:
+        service.close()