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).

README.md

@@ -173,6 +173,14 @@ The detail lives in dedicated documents:
   1× is real time, up to 3600× (a day in 24 s); every station is
   clickable and names the source of its figures; on phones and tablets
   held sideways it pinch-zooms and opens station details in a side sheet
+- [Press fleet calculator](docs/fleet-calculator.html): a single static
+  page for the business plan: set the records a year and the share of
+  splatter and specials, and it sizes the mix of Duplex systems (3
+  records a minute each) and Classics (2 a minute) from the start fleet
+  of two Duplex and one Classic up to a full press hall, with the people,
+  power, central hydraulics, steam, cooling, air, floor, compound and
+  stampers that fleet needs; every assumption is editable, with its
+  source, and a scenario can be shared by link
 - [Test site](site/README.md): `site/` builds https://cnxvinyl.lol/, the
   internal test site with demo pages from `docs/` (the plant operation
   page first) and any static site we want to share by link; Gitea Actions
@@ -248,6 +256,7 @@ docs/
 ├── crane-workshop-tours.md Overhead crane, workshop, visitor corridor
 ├── digital-factory.md     Data platform, NixOS/Clan fleet, acquisition, app
 ├── facility-security.md   Security, HVAC, fire and life safety, compliance
+├── fleet-calculator.html  Press fleet calculator: output, mix, requirements
 ├── payap-partnership.md   Joint student programmes with Payap University
 ├── plant-operation.html   Animated plant overview (simulated SCADA)
 ├── process-flow.md        Audio file to delivered record, with all checks