REDEPLOY: clean emcc resolver, auto-install, /bin/sh noexec bypass

Clean rewrite: auto-install emsdk, /bin/sh noexec bypass, pywasm runtime

Auto-install emsdk to /data on first compile, /bin/sh noexec bypass

FIX: /bin/sh bypass for noexec — zero-copy compile from /data

Lazy emcc: no import-time copy, fast UI load, emcc copied only on first compile

Optimized: warm emcc cache at import, fast cp -r, clean pywasm API

Speed up: cache emcc path, use cp -r instead of shutil.copytree

Fix: keep emsdk in /data (persistent), copy to /tmp on startup for execution

Fix: emsdk in /tmp (exec), WASM in /data (persistent)

Fix runner: add export diagnostics, better error messages, auto-detect function names

Deploy LCPU: C-to-WASM compiler, runner, and visualizer with fixed pywasm API