feat: update CAN integration and T2G seat firmware

src/cognitive_agent/server.py

@@ -14,7 +14,7 @@ from http.cookies import CookieError, SimpleCookie
 from http import HTTPStatus
 from http.server import BaseHTTPRequestHandler, ThreadingHTTPServer
 from pathlib import Path
-from urllib.parse import quote, unquote, urlparse
+from urllib.parse import parse_qs, quote, unquote, urlparse
 
 from cognitive_agent.config_loader import load_local_env
 
@@ -62,7 +62,8 @@ class SeatDemoHandler(BaseHTTPRequestHandler):
     server_version = "CognitiveAgentCabinDemo/2.0"
 
     def do_GET(self) -> None:  # noqa: N802 - stdlib handler API
-        path = unquote(urlparse(self.path).path)
+        parsed_url = urlparse(self.path)
+        path = unquote(parsed_url.path)
         if path == "/favicon.ico":
             self.send_response(HTTPStatus.NO_CONTENT)
             self._send_security_headers()
@@ -94,6 +95,32 @@ class SeatDemoHandler(BaseHTTPRequestHandler):
         if path == "/api/runtime":
             self._json(self.service.runtime_info())
             return
+        if path == "/api/hardware/seat-state":
+            query = parse_qs(parsed_url.query)
+            conversation_id = str(query.get("conversation_id", [""])[0])
+            vehicle_id = str(query.get("vehicle_id", [""])[0]) or None
+            try:
+                self._json(
+                    self.service.synchronize_hardware_state(
+                        conversation_id,
+                        vehicle_id,
+                    )
+                )
+            except ValueError as exc:
+                self._json(
+                    {"error": "invalid_request", "message": str(exc)},
+                    HTTPStatus.BAD_REQUEST,
+                )
+            except Exception as exc:  # noqa: BLE001 - surface passive CAN availability
+                self.log_error("physical seat-state synchronization failed: %s", exc)
+                self._json(
+                    {
+                        "error": "hardware_state_unavailable",
+                        "message": str(exc),
+                    },
+                    HTTPStatus.SERVICE_UNAVAILABLE,
+                )
+            return
         if path == "/api/gesture/runtime":
             self._json(self.gesture.runtime_info())
             return