fix(repeater): delegate sensor endpoints from StatsApp to APIEndpoints

CherryPy mounts StatsApp at / but sensor endpoints are on APIEndpoints.
Add @cherrypy.expose delegation methods so /sensors_types, /sensors_config,
/sensors_config_update, and /sensors_read resolve correctly instead of
falling through to the SPA catch-all.

repeater/web/http_server.py

@@ -491,6 +491,35 @@ class StatsApp:
             logger.error(f"Error serving index.html: {e}")
             raise cherrypy.HTTPError(500, "Internal server error")
 
+    # ============================================================================
+    # Sensor Manager endpoint delegation (APIEndpoints methods → StatsApp)
+    # ============================================================================
+
+    @cherrypy.expose
+    @cherrypy.tools.json_out()
+    def sensors_types(self):
+        """Delegate to APIEndpoints.sensors_types()."""
+        return self.api.sensors_types()
+
+    @cherrypy.expose
+    @cherrypy.tools.json_out()
+    def sensors_config(self):
+        """Delegate to APIEndpoints.sensors_config()."""
+        return self.api.sensors_config()
+
+    @cherrypy.expose
+    @cherrypy.tools.json_out()
+    @cherrypy.tools.json_in()
+    def sensors_config_update(self):
+        """Delegate to APIEndpoints.sensors_config_update()."""
+        return self.api.sensors_config_update()
+
+    @cherrypy.expose
+    @cherrypy.tools.json_out()
+    def sensors_read(self):
+        """Delegate to APIEndpoints.sensors_read()."""
+        return self.api.sensors_read()
+
     @cherrypy.expose
     def default(self, *args, **kwargs):
         """Handle client-side routing - serve index.html for all non-API routes."""
@@ -499,6 +528,7 @@ class StatsApp:
         if cherrypy.request.method == "OPTIONS":
             return ""
 
+
         # Application UI plugins: /plugins/{id}/...
         if args and args[0] == "plugins":
             if len(args) < 2: