Press fleet calculator: target output and specials share to fleet mix and needs

User, October 2026: calculations for the later business plan, starting
from 2 Duplex + 1 Classic at 3 records a minute per Duplex and 2 per
Classic, as an interactive tool on the website: pick the yearly output
and the share of splatter/specials, get the machine mix and all the
requirements (people, hydraulics, power, ...).

docs/fleet-calculator.html (single static page, no dependencies):
- target mode sizes the fleet (specials only on Duplex with its EX 35;
  grow with Classics or with Duplex systems; start fleet as the floor);
  fleet mode takes a fleet and gives its output at the specials share;
- output, capacity, utilisation and the mix bar per machine type;
- needs: people per shift and in total, galvanics operators, machines,
  connected kVA and average kW, MWh/yr, central hydraulics (flow, motor,
  oil, accumulator), steam, cooling and cooling water, compressed air,
  press floor, room climate, compound, trim, titles, electroformed parts
  and plating units; checks against the 400 kg/h boiler, 250 kW chiller
  and the 870 m2 Payap press hall;
- ladder from the start fleet to a full Payap press hall, click to load;
- every assumption editable with its source (Newbilt Duplex site
  requirements V14 and offer 240620-04, scale.md, galvanics.md, revenue
  model, Payap model; estimates labelled), shareable link via the hash.
The Classic counts as one HRP 12 press plus one extruder until Newbilt
states figures (Toolex Alpha leaflet as a cross-check).

Site: DEMOS entry (/demos/fleet-calculator/) and landing-page entry.
README bullet and layout line; backlinks from scale.md (capacity) and
pressing-line.md (current plan).

docs/scale.md

@@ -14,6 +14,13 @@ page as real quotes and the site decision land.
 | Mature | 4 semi-auto (two Duplex systems, each EX 50 + EX 35) + 1 automated (Newbilt Classic), 2 shifts | ~1.0 to 1.5 million records/yr |
 | Expansion (option) | the mature fleet + up to 10 more Newbilt Classics, 2 shifts | ~4.7 to 5.8 million records/yr (estimate) |
 
+The [press fleet calculator](fleet-calculator.html) sizes the fleet for
+any yearly output and specials share, with the people and utilities it
+needs; at the user's planning rates (3 records a minute per Duplex
+system, 2 per Classic, 65 % effectiveness, two shifts) the start fleet
+makes ~1.5 million records a year and a full Payap press hall (two Duplex
+systems and eleven Classics) ~5.2 million.
+
 Basis: the current fleet plan of October 2026
 ([pressing line](equipment/pressing-line.md)). The automated Classic
 ~128 records/hour (28 s cycle, vendor flyer); semi-automatic throughput is