[PaulDWhite]

Addresses #57 (climb rate to power ratio).

Climb power bar

A thin bar under the kW readout (0–16 kW) that shows where to sit on the throttle for an efficient climb. It has no number readout.

Mark	Meaning
Pink tick + small brackets	Level-flight power. The brackets shrink as the estimate firms up.
Green band	Most efficient sustainable climb power (within 5% of the best climb per kW)
Yellow zone	Holding this power would reach a warning temperature
Red zone	Holding this power would reach a critical temperature
White / black tick	Current power

• Level power is learned live from the controller barometer and pack power: recency-weighted, slope-corrected level-equivalent power, with a calibrated uncertainty margin.
• Climb band comes from the model w = s(P−L)(1−q(P−L)), so best climb power is P* = √(L² + L/q). Only the level power L is learned per flight; q is the curve shape from real flights.
• Thermal zones project each part's temperature over the next 5 minutes (or until 15% SOC) at a given power.
  • Motor and ESC (MOSFET, capacitor, MCU) use a live first-order fit.
  • Battery cells, BMS MOSFET and BMS balance use a pack-size-scaled heating model. Pack size is learned from SOC drop vs energy used.
  • Limits use the existing monitor_config.h warning and critical thresholds.
• Nothing is shown before takeoff or until the current flight has enough data.
• Everything runs on the ESP32 from the current flight only. Real flight logs were used offline to tune the priors and check the estimates.

Hand-controller emulator (tools/hc_emulator)

• The real LVGL main screen built natively (hc_emulator), plus the estimator and thermal model on their own (climb_eff_replay).
• A browser dashboard (server.py) with a flight simulator and OpenPPG app CSV log replay, including full-length real flights.
• analysis/ holds the offline scripts used to build ground truth from real logs and score the estimator against it.

See tools/hc_emulator/README.md.

Display fixes

• Crisper text: Montserrat regenerated with strong autohinting (tools/fonts/gen_hinted_fonts.py), so small glyph stems (e.g. M, m) land on whole pixels. Built-in LVGL fonts are disabled; flash use is 34.8%.
• Dark mode: yellow temperature tiles use black text, and the SOC bar uses the normal yellow instead of the darker tint.
• Alert names: sensor names moved from simple_monitor.cpp to sensor_names.cpp (no string changes), so the emulator and screenshot tests show the controller's real alert labels (e.g. MC-FT-H).

Testing

• New native tests: test_climb_efficiency, test_thermal_headroom.
• Screenshot references regenerated for the fonts, the bar and the dark-mode fixes.
• Firmware builds for OpenPPG-CESP32S3-CAN-SP140; cpplint is clean.
• Still needed: an in-flight check on hardware.