New: agor-pty/native/agor_resize.c — C shared library that:
- Connects button-press-event on GtkWindow + WebView children in C
- Stores mouseButton, xroot, yroot, dragTime from real GTK events
- Exports agor_resize_start(edge) for Bun FFI
Build: gcc -shared -fPIC -o libagor-resize.so agor_resize.c $(pkg-config --cflags --libs gtk+-3.0)
New: ui-electrobun/src/bun/native-resize.ts — Bun FFI wrapper
App.svelte: simplified to just edge detection + RPC call
