Revert schematic to metrics view and park F2 plan

TODO.md

@@ -7,11 +7,7 @@
 - [ ] Introduce CHF/DNB margin, clad/fuel split temps, and SCRAM matrix for subcooling loss or SG level/pressure trips.
 - [ ] Flesh out condenser behavior: vacuum pump limits, cooling water temperature coupling, and dynamic back-pressure with fouling.
 - [ ] Dashboard polish: compact turbine/generator rows, color critical warnings (SCRAM/heat-sink), and reduce repeated log noise.
-- [ ] Dashboard multi-page view (F1/F2):
-  - F1 retains current numeric layout.
-  - F2 adds an ASCII schematic of the plant (core, primary pumps/pressurizer/HX, secondary pumps/drum, turbines/gens/consumer, reliefs/condenser) with inline key values (flows, pressures, steam quality/enthalpy, MW) and simple animations for flow/status.
-  - Add page indicator/status hint and size checks; keep updates performant (prebuilt template, minimal redraws).
-  - Optional: color-coded states (RUN/START/CAV/RELIEF) and blinking for alarms.
+- [ ] Dashboard multi-page view (F1/F2): retain numeric view on F1; future F2 schematic should mirror real PWR layout with ASCII art, flow/relief status, and minimal animations; add help/status hints and size checks; keep perf sane.
 - [ ] Incremental realism plan:
   - Add stored enthalpy for primary/secondary loops and a steam-drum mass/energy balance (sensible + latent) while keeping existing pump logic and tests passing. Target representative PWR conditions: primary 15–16 MPa, 290–320 °C inlet/320–330 °C outlet, secondary saturation ~6–7 MPa with boil at ~490–510 K.
   - Adjust HX/pressure handling to use stored energy (saturation clamp and pressure rise) and validate steam formation with both pumps at ~3 GW. Use realistic tube-side material assumptions (Inconel 690/SS cladding) and clamp steam quality to phase-equilibrium enthalpy.