Smart Thermostat Installation & HVAC Zoning Setup

I own a single-family house with a central forced-air HVAC system that currently runs off one old mechanical thermostat, and I want to modernize it. The upstairs bedrooms get uncomfortably warm in the evening while the ground floor stays cold, so a single set point clearly isn't working for a two-story layout with very different sun exposure and insulation from room to room. I'm looking for a licensed HVAC technician to install a smart thermostat and build out proper zoning so each area of the house can be controlled independently.

The job covers the whole system, not just swapping the thermostat on the wall. I need dampers installed in the ductwork, a zone control panel wired to the existing furnace and air handler, and separate temperature sensors placed in the main living areas so the system actually reads conditions where people spend time rather than guessing from one hallway. I also want the new smart thermostat to be usable from a phone app and to keep working correctly with the existing furnace, heat pump, and central air conditioner without voiding any manufacturer warranties.

I can supply the brand of smart thermostat I already purchased, or take a recommendation if you have one you trust for multi-zone setups. Please walk me through your typical process, the expected timeline, and what happens with the existing thermostat wiring, since I'm not sure it currently has enough conductors for a smart unit plus zoning. I'd like an itemized quote before any work begins.

Requirements and deliverables:
— Licensed and insured HVAC technician with documented zoning experience
— Install a compatible smart thermostat and configure Wi-Fi/app control
— Add zone dampers, a control panel, and sensors for at least two to three zones
— Verify compatibility with the existing furnace, heat pump, and AC unit
— Test airflow balance and temperature accuracy in every zone before finishing
— Provide a brief walkthrough of the app and manual override controls