Unified Engelbert Strauss workwear for all staff

User, October 2026: we want unified Engelbert Strauss work clothes.

- worker-safety.md: decision recorded; everyone, office included, in the
  same Strauss workwear with the company logo, process PPE on top. Kit at
  Strauss catalogue prices checked October 2026 (incl. 19 % German VAT,
  which drops out on export): production 3 trousers e.s.motion 2020, 3
  polo shirts, 2 T-shirts, a sweatshirt, S1 safety shoes e.s. Vasegus II
  low, ~293 EUR before VAT, ~338 with embroidered logos (embroidery price
  an estimate); office 4 polos and a softshell jacket, ~127 EUR. Ordering:
  Strauss ships outside Germany where customs law allows, shipping quoted
  with the order, prepayment, duty and taxes charged to the recipient;
  Thai duty on work trousers 13.8 %, BOI does not cover clothing. About
  9k USD (~0.3M THB) a year at the start fleet. Check lighter lines for
  the press hall heat with samples.
- revenue-model.md: workwear noted on top of the x1.3.
- Fleet calculator: workwear line under labour (production and office
  kits a year, shipping and Thai duty), six new assumptions; 8,573 USD a
  year at the defaults.

docs/worker-safety.md

@@ -16,6 +16,34 @@ commitments:
   goggles, and process-specific protection) is mandatory per work area, in
   line with the equipment vendor's site requirements (exhaust work benches,
   fire protection) and local regulations.
+- **Unified workwear (decided October 2026).** Every member of staff,
+  office included, wears the same Engelbert Strauss workwear (the brand
+  now trades as Strauss, [strauss.com](https://www.strauss.com/de/en/))
+  with the company logo. Process PPE stays on top of it: chemical
+  protection in galvanics, heat gloves at the presses, hearing protection
+  where the noise survey asks for it.
+  - **Kit** (catalogue prices including 19 % German VAT, which drops out
+    on export, checked October 2026): production gets three pairs of
+    trousers e.s.motion 2020 (from 65.33 EUR), three e.s. polo shirts
+    cotton (from 15.35), two e.s. T-shirts cotton (from 7.96), an e.s.
+    sweatshirt (from 18.92) for the air-conditioned rooms, and S1 safety
+    shoes e.s. Vasegus II low (71.28 from 10 pairs; steel toe cap,
+    antistatic): ~293 EUR before VAT, ~338 with the logo embroidered (logo
+    from 4 pieces per motif; ~5 EUR a piece is an estimate). The office
+    gets four polo shirts and a softshell jacket e.s.motion 2020 (from
+    59.38): ~127 EUR with logos. Heavy cotton trousers are hot in the
+    press hall; check the lighter Strauss lines with samples before the
+    first order.
+  - **Ordering and import:** Strauss delivers outside Germany where customs
+    law allows, quotes the shipping when it confirms the order, asks for
+    prepayment, and the forwarder charges the recipient duty and taxes
+    ([B2B terms](https://www.strauss.com/de/en/Legal_information/Terms_and_Conditions/B2B)).
+    Thai duty on work trousers (HS 6203) is 13.8 %
+    ([customs-compliance.ai](https://customs-compliance.ai/duty/men-s-suits-and-trousers-hs-6203),
+    March 2026); BOI does not cover clothing. The import VAT is reclaimable
+    as input tax. Planning figure: one production kit a head a year and
+    half an office kit, plus ~15 % shipping and ~14 % duty (estimates), so
+    ~9k USD (~0.3M THB) a year at the start fleet's ~20 staff.
 - **Lifting and machine service**: the overhead crane needs trained
   operators and slingers, a lift plan for every machine move, and the
   periodic engineer inspections Thai law sets for cranes. A machine is