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DriverConfigModal, DeviceModal and RawTagModal built a new parameter dictionary and new EventCallbacks every render. ParameterDictionaryCache reuses the dictionary while the values it carries are unchanged and rebuilds it with the current value when one changes (a build-once cache would strand edits); the callbacks are created once. Blazor still re-sets an EventCallback-bearing child's parameters per parent render, so the forms' _lastParsed guards stay. Refs #745 Claude-Session: https://claude.ai/code/session_01Ub9hGmYLQvn9XETzw7CMsT