style(hook): clippy -D warnings clean on default + fifa17 features

Modernize manual nul-terminated byte strings to C-string literals (c"...")
at all Win32 GetModuleHandleA/GetProcAddress/getaddrinfo call sites (byte-identical),
drop two redundant SOL_SOCKET-as-i32 casts, remove a needless return in the fifa17
install path, and add a # Safety section to DllMain. Scope the FIFA-23-path
dead-code/unused-import lints (unused only under the fifa17 feature, stripped by the
linker) with a documented crate-level cfg_attr allow. Cross-verified: both the
default and fifa17 builds now pass clippy -D warnings and compile; probe and
capture_baseline still build.

openfut-hook/src/lib.rs

@@ -1,3 +1,12 @@
+// The `fifa17` feature compiles this shared crate but activates only the FIFA-17
+// injection path (fifa17.rs + sbc_*): install_hooks() routes to fifa17::install()
+// and the FIFA-23 hook modules are reached solely via install_hooks_fifa23(), which
+// is itself `#[cfg(not(feature = "fifa17"))]`. Those modules are therefore compiled
+// but unused under `fifa17` (the linker strips them from the cdylib). Scope the
+// resulting dead-code/unused-import lints to that feature so both builds stay
+// `-D warnings` clean without dropping code the default (FIFA-23) build needs.
+#![cfg_attr(feature = "fifa17", allow(dead_code, unused_imports))]
+
 mod config;
 mod connect_hook;
 mod connectex_hook;
@@ -54,6 +63,13 @@ pub(crate) fn flush_log() {
     }
 }
 
+/// # Safety
+///
+/// This is the DLL entry point invoked by the Windows loader; it MUST NOT be
+/// called manually. `module` must be the valid `HMODULE` the loader passes for
+/// this DLL. On `DLL_PROCESS_ATTACH` it installs process-wide inline detours
+/// (raw memory patching), so it must run exactly once, on the loader thread,
+/// before any hooked API is used.
 #[no_mangle]
 pub unsafe extern "system" fn DllMain(module: HMODULE, reason: u32, _: *mut ()) -> BOOL {
     if reason == DLL_PROCESS_ATTACH {
@@ -73,7 +89,6 @@ unsafe fn install_hooks(module: HMODULE) {
     {
         let _ = module;
         fifa17::install();
-        return;
     }
     #[cfg(not(feature = "fifa17"))]
     install_hooks_fifa23(module)