Business plan draft 0.3 in two versions: Plan A ~180M and Plan B ~225M THB

- One build makes both documents: plan_variant.py switches the
  plan-specific text (pick / is_a / label); build_plan.py writes
  CNX-Vinyl-Business-Plan-A and -B (docx), export_pdf.py exports both PDFs
  with the table of contents filled in. Draft 0.2 (single launch-plant
  plan with contingency) is removed; it stays in the history.
- Plan A: the launch plant with every machine and six cost levers, ~177M
  THB with the ramp-up reserve, no contingency. Plan B: the second Duplex
  at launch, five presses, ~224M THB on the same basis. Each version reads
  as a complete plan with one table comparing it with the other; the
  216M investor-question text is gone, Pheenix is priced at OMS's
  reference plus 20 %.
- Calculator renders in both documents, each from its own preset: the
  plant at a glance (Figure 4), the budget check (Figure 5) and ten years
  of cash (Figure 6), in docs/renders/calculator/.
- Calculator budget card: the verdict and third KPI now name the tightest
  budget the midpoint fits (Plan A: 3.3M to spare under 180M; Plan B:
  0.8M under 225M) instead of always 225M.
- Fixes: CD replication cross-references point to section 4.10; the
  blended price in section 3.3 and roadmap item 1 is 3.76 to 5.27 USD at
  60 % specials (3.50 to 4.60 at a standard-heavy mix).

docs/business-plan/build/build_plan.py

@@ -1,9 +1,12 @@
-"""Build the CNX Vinyl business plan .docx.
+"""Build the CNX Vinyl business plan .docx, in its two versions (October 2026).
 
-    python build_plan.py            -> ../CNX-Vinyl-Business-Plan.docx
-    python build_plan.py out.docx   -> custom path
+    python build_plan.py                 -> ../CNX-Vinyl-Business-Plan-A.docx and -B.docx
+    python build_plan.py A               -> ../CNX-Vinyl-Business-Plan-A.docx
+    python build_plan.py B out.docx      -> Plan B to a custom path
 
-Images are resolved relative to docs/ (the parent of business-plan/).
+Plan A (~180M THB) and Plan B (~225M THB) share every chapter; the content modules
+switch the plan-specific text with plan_variant.pick(). Images are resolved relative
+to docs/ (the parent of business-plan/).
 """
 from __future__ import annotations
 
@@ -14,14 +17,21 @@ HERE = Path(__file__).resolve().parent
 sys.path.insert(0, str(HERE))
 
 from plan_lib import Renderer  # noqa: E402
+import plan_variant  # noqa: E402
 import content_a, content_b, content_c  # noqa: E402
 
 DOCS = HERE.parent.parent          # .../docs
-OUT = HERE.parent / "CNX-Vinyl-Business-Plan.docx"
+VERSION = "draft 0.3, October 2026"
 
 
-def main(out: Path = OUT) -> Path:
-    r = Renderer(DOCS, header_text="CNX Vinyl / Poy Records: Business plan, draft 0.2, October 2026",
+def out_path(plan: str) -> Path:
+    return HERE.parent / f"CNX-Vinyl-Business-Plan-{plan}.docx"
+
+
+def main(plan: str = "A", out: Path | None = None) -> Path:
+    plan_variant.PLAN = plan
+    out = out or out_path(plan)
+    r = Renderer(DOCS, header_text=f"CNX Vinyl / Poy Records: Business plan, {plan_variant.label()}, {VERSION}",
                  footer_text="Confidential")
     r.render(content_a.blocks() + content_b.blocks() + content_c.blocks())
     r.save(out)
@@ -29,5 +39,8 @@ def main(out: Path = OUT) -> Path:
 
 
 if __name__ == "__main__":
-    target = Path(sys.argv[1]) if len(sys.argv) > 1 else OUT
-    print(main(target))
+    args = sys.argv[1:]
+    plans = [args.pop(0).upper()] if args and args[0].upper() in ("A", "B") else ["A", "B"]
+    target = Path(args[0]) if args else None
+    for p in plans:
+        print(main(p, target if len(plans) == 1 else None))