Function webui_streaming_session_update 

#[unsafe(no_mangle)]
pub unsafe extern "C" fn webui_streaming_session_update(
    session_ptr: *mut webui_streaming_session_t,
    boundary: u32,
    state_json: *const c_char,
    out_len: *mut usize,
) -> *mut c_char

Push a projected state patch to a committed updatable boundary.

Returns a NUL-terminated UTF-8 chunk that must be freed with webui_free, or NULL on error. When out_len is non-null it receives the byte length excluding the terminator.

Safety

• session_ptr must be a live session handle.
• state_json must be non-null, null-terminated UTF-8.
• out_len must be writable, or NULL.