web: build_standalone.py — self-contained calc-standalone.html (fallback when no server); standalone html is generated, gitignored

.gitignore

@@ -11,3 +11,4 @@ venv/
 *.spec
 .coverage
 web/node_modules/
+web/calc-standalone.html

web/build_standalone.py

@@ -0,0 +1,14 @@
+#!/usr/bin/env python3
+"""Собирает web/calc-standalone.html — один self-contained файл (inline CSS+JS)."""
+import pathlib
+web = pathlib.Path(__file__).parent
+html = (web / "index.html").read_text(encoding="utf-8")
+css = (web / "style.css").read_text(encoding="utf-8")
+js = (web / "engine.js").read_text(encoding="utf-8") + "\n" + (web / "app.js").read_text(encoding="utf-8")
+html = html.replace('<link rel="stylesheet" href="style.css">', f"<style>\n{css}</style>")
+html = html.replace('<script src="engine.js"></script>\n<script src="app.js"></script>',
+                    f"<script>\n{js}\n</script>")
+assert "href=\"style.css\"" not in html and "src=\"app.js\"" not in html and "src=\"engine.js\"" not in html
+out = web / "calc-standalone.html"
+out.write_text(html, encoding="utf-8")
+print(out, out.stat().st_size, "bytes")