Add authenticated WebSocket serial terminal - dirty commit with front-

and backend issues

web_assets/generate_embedded_assets.py

@@ -0,0 +1,64 @@
+#!/usr/bin/env python3
+# SPDX-License-Identifier: GPL-3.0-only
+"""Generate deterministic C arrays for PlatformIO-compatible asset embedding."""
+
+from pathlib import Path
+
+ASSETS = (
+    ("xterm.js.gz", "web_asset_xterm_js_gz"),
+    ("xterm.css.gz", "web_asset_xterm_css_gz"),
+    ("addon-fit.js.gz", "web_asset_addon_fit_js_gz"),
+)
+
+ROOT = Path(__file__).resolve().parent.parent
+ASSET_DIR = ROOT / "web_assets"
+HEADER_PATH = ROOT / "src" / "web_assets_data.h"
+SOURCE_PATH = ROOT / "src" / "web_assets_data.c"
+
+
+def format_array(data: bytes) -> str:
+    lines = []
+    for offset in range(0, len(data), 12):
+        chunk = data[offset : offset + 12]
+        lines.append("    " + ", ".join(f"0x{value:02x}" for value in chunk) + ",")
+    return "\n".join(lines)
+
+
+def main() -> None:
+    header = """/* SPDX-License-Identifier: GPL-3.0-only */
+/* Generated web-asset data declarations. */
+
+#pragma once
+
+#include <stddef.h>
+#include <stdint.h>
+
+"""
+    source = """/* SPDX-License-Identifier: MIT */
+/*
+ * Deterministically generated from the vendored MIT-licensed gzip files in
+ * web_assets/. See web_assets/SOURCES.md and the accompanying license files.
+ * Regenerate with: python3 web_assets/generate_embedded_assets.py
+ */
+
+#include "web_assets_data.h"
+
+"""
+
+    for filename, symbol in ASSETS:
+        data = (ASSET_DIR / filename).read_bytes()
+        header += f"extern const uint8_t {symbol}[];\n"
+        header += f"extern const size_t {symbol}_size;\n\n"
+        source += (
+            f"const uint8_t {symbol}[] __attribute__((aligned(4))) = {{\n"
+            f"{format_array(data)}\n"
+            "};\n"
+            f"const size_t {symbol}_size = sizeof({symbol});\n\n"
+        )
+
+    HEADER_PATH.write_text(header, encoding="utf-8", newline="\n")
+    SOURCE_PATH.write_text(source, encoding="utf-8", newline="\n")
+
+
+if __name__ == "__main__":
+    main()