Implemented admin pane + user permission

internal/dsp/types.go

@@ -22,8 +22,20 @@ var (
 		"moving_average": true, "rms": true, "lowpass": true,
 		"derivative": true, "integrate": true, "lua": true,
 	}
+	// statefulOps accumulate state across evaluations, so a single-shot trace
+	// (fresh state) only approximates their true running value. lua is included
+	// because a script may persist state in its state table.
+	statefulOps = map[string]bool{
+		"moving_average": true, "rms": true, "lowpass": true,
+		"derivative": true, "integrate": true, "lua": true,
+	}
 )
 
+// IsStateful reports whether an op accumulates state across evaluations. The
+// editor's live/debug trace flags such nodes as "approx" since it evaluates a
+// single tick with fresh state.
+func IsStateful(op string) bool { return statefulOps[op] }
+
 // OpOutputType reports the output ValType of an op given its input types, and
 // an error if the inputs are definitely incompatible with the op. Inputs may be
 // ValUnknown (a source whose real type is not yet known at compile time); such