fix(windows): clippy/build cleanups the on-glass build surfaced (-D warnings)

Built the host crate (`cargo clippy --features nvenc -D warnings`) and the driver
workspace (`cargo build`) on the RTX box — the project's intended Windows gate,
which `cargo check` (what the goal1/§2.5 work used) never runs. It surfaced lint
issues accumulated across the goal1 / §2.5 / this-session Windows work:

- 9× redundant `as *mut c_void` after `.as_raw_handle()` (already `*mut c_void`):
  idd_push.rs (3, this session), service.rs (3, this session), manager.rs (3,
  pre-existing §2.5 — my OwnedHandle work copied the idiom). Removed the casts +
  the now-unused `use std::ffi::c_void` in idd_push.rs / manager.rs (service still
  uses it).
- `if_same_then_else` in session_plan.rs::resolve_topology (pre-existing goal1
  stage 3): collapsed the two `false` arms into one condition (behavior identical).
- `unused_unsafe` in the driver `pod_init!` macro: it expands at call sites already
  inside an `unsafe` block, where its own `unsafe` is redundant — `#[allow(
  unused_unsafe)]` (needed at the non-unsafe sites, redundant at the nested ones).

After these, BOTH builds are clean on the box — validating the whole session's
blind Windows + driver work compiles + passes clippy on real hardware.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

crates/punktfunk-host/src/capture/windows/idd_push.rs

@@ -14,7 +14,6 @@ use super::dxgi::{make_device, D3d11Frame, HdrConverter, WinCaptureTarget};
 use super::{CapturedFrame, Capturer, FramePayload, PixelFormat};
 use anyhow::{bail, Context, Result};
 use pf_driver_proto::frame;
-use std::ffi::c_void;
 use std::os::windows::io::{AsRawHandle, FromRawHandle, OwnedHandle};
 use std::sync::atomic::{AtomicU32, AtomicU64, Ordering};
 use std::time::{Duration, Instant, SystemTime, UNIX_EPOCH};
@@ -400,7 +399,7 @@ impl IddPushCapturer {
             // Own the mapping handle so it (and its view) free via `MappedSection` RAII even on bail.
             let map = OwnedHandle::from_raw_handle(map.0 as _);
             let view = MapViewOfFile(
-                HANDLE(map.as_raw_handle() as *mut c_void),
+                HANDLE(map.as_raw_handle()),
                 FILE_MAP_ALL_ACCESS,
                 0,
                 0,
@@ -450,7 +449,7 @@ impl IddPushCapturer {
                     // Own the mapping handle so it (and its view) free via `MappedSection` RAII.
                     let dm = OwnedHandle::from_raw_handle(dm.0 as _);
                     let dv = MapViewOfFile(
-                        HANDLE(dm.as_raw_handle() as *mut c_void),
+                        HANDLE(dm.as_raw_handle()),
                         FILE_MAP_ALL_ACCESS,
                         0,
                         0,
@@ -936,9 +935,7 @@ impl Capturer for IddPushCapturer {
     fn next_frame(&mut self) -> Result<CapturedFrame> {
         let deadline = Instant::now() + Duration::from_secs(20);
         loop {
-            let _ = unsafe {
-                WaitForSingleObject(HANDLE(self.event.as_raw_handle() as *mut c_void), 16)
-            };
+            let _ = unsafe { WaitForSingleObject(HANDLE(self.event.as_raw_handle()), 16) };
             if let Some(f) = self.try_consume()? {
                 return Ok(f);
             }

crates/punktfunk-host/src/session_plan.rs

@@ -138,9 +138,7 @@ fn resolve_topology() -> SessionTopology {
     let cfg = crate::config::config();
     // `NO_HELPER`/`NO_WGC` force single-process; IDD-push captures in-process in Session 0 (no helper);
     // otherwise the helper runs when forced or when we're SYSTEM (in-process WGC can't activate there).
-    let helper = if cfg.no_helper || crate::capture::wgc_disabled() {
-        false
-    } else if cfg.idd_push {
+    let helper = if cfg.no_helper || crate::capture::wgc_disabled() || cfg.idd_push {
         false
     } else {
         cfg.force_helper || crate::capture::wgc_relay::running_as_system()

crates/punktfunk-host/src/vdisplay/windows/manager.rs

@@ -13,7 +13,6 @@
 //! its `Drop` releases the refcount (a *stale* lease — its monitor was preempted + recreated under it —
 //! is a no-op, so it can never tear down the live monitor).
 
-use std::ffi::c_void;
 use std::os::windows::io::{AsRawHandle, OwnedHandle};
 use std::sync::atomic::{AtomicBool, AtomicU32, AtomicU64, Ordering};
 use std::sync::{Arc, Mutex, Once, OnceLock};
@@ -160,11 +159,11 @@ impl VirtualDisplayManager {
     /// double-open.
     fn ensure_device(&self) -> Result<HANDLE> {
         if let Some(d) = self.device.get() {
-            return Ok(HANDLE(d.as_raw_handle() as *mut c_void));
+            return Ok(HANDLE(d.as_raw_handle()));
         }
         let (handle, watchdog_s) = unsafe { self.driver.open()? };
         self.watchdog_s.store(watchdog_s, Ordering::Relaxed);
-        let raw = HANDLE(handle.as_raw_handle() as *mut c_void);
+        let raw = HANDLE(handle.as_raw_handle());
         let _ = self.device.set(Arc::new(handle));
         Ok(raw)
     }
@@ -174,7 +173,7 @@ impl VirtualDisplayManager {
     fn device_handle(&self) -> Option<HANDLE> {
         self.device
             .get()
-            .map(|d| HANDLE(d.as_raw_handle() as *mut c_void))
+            .map(|d| HANDLE(d.as_raw_handle()))
     }
 
     /// Open + initialise the backend (validates the driver is present). Mirrors the old

crates/punktfunk-host/src/windows/service.rs

@@ -306,7 +306,7 @@ fn supervise(stop: HANDLE, session_ev: HANDLE) -> Result<()> {
         }
 
         // BORROW the owned job handle for AssignProcessToJobObject inside spawn_host.
-        let job_h = HANDLE(job.as_raw_handle() as *mut c_void);
+        let job_h = HANDLE(job.as_raw_handle());
         let child = match unsafe { spawn_host(session, &cmdline, &workdir, job_h) } {
             Ok(child) => child,
             Err(e) => {
@@ -323,7 +323,7 @@ fn supervise(stop: HANDLE, session_ev: HANDLE) -> Result<()> {
         // `proc_h` is a plain copy that does NOT close it). `child` owns the process + thread handles
         // and auto-closes BOTH when it drops — at the end of this iteration, on `continue`, or on
         // `break` — so every match arm below only stops/terminates and lets the drop do the closing.
-        let proc_h = HANDLE(child.process.as_raw_handle() as *mut c_void);
+        let proc_h = HANDLE(child.process.as_raw_handle());
 
         // Wait on stop / session-change / child-exit.
         let reason = wait_any(&[stop, session_ev, proc_h], INFINITE);
@@ -403,7 +403,7 @@ unsafe fn make_job() -> Result<OwnedHandle> {
     info.BasicLimitInformation.LimitFlags =
         JOB_OBJECT_LIMIT_KILL_ON_JOB_CLOSE | JOB_OBJECT_LIMIT_BREAKAWAY_OK;
     SetInformationJobObject(
-        HANDLE(job.as_raw_handle() as *mut c_void),
+        HANDLE(job.as_raw_handle()),
         JobObjectExtendedLimitInformation,
         &info as *const _ as *const c_void,
         std::mem::size_of::<JOBOBJECT_EXTENDED_LIMIT_INFORMATION>() as u32,