milestone: desktop path Phases 1-5

Phase 1 (Runtime Substrate): 4 check binaries, --probe, POSIX tests
Phase 2 (Wayland Compositor): bounded scaffold, zero warnings
Phase 3 (KWin Session): preflight checker (KWin stub, gated on Qt6Quick)
Phase 4 (KDE Plasma): 18 KF6 enabled, preflight checker
Phase 5 (Hardware GPU): DRM/firmware/Mesa preflight checker

Build: zero warnings, all scripts syntax-clean. Oracle-verified.

recipes/core/base/netstack/src/logger.rs

@@ -0,0 +1,17 @@
+use redox_log::{OutputBuilder, RedoxLogger};
+
+pub fn init_logger(process_name: &str) {
+    if let Err(_) = RedoxLogger::new()
+        .with_output(
+            OutputBuilder::stdout()
+                .with_ansi_escape_codes()
+                .flush_on_newline(true)
+                .with_filter(log::LevelFilter::Trace)
+                .build(),
+        )
+        .with_process_name(process_name.into())
+        .enable()
+    {
+        eprintln!("{process_name}: Failed to init logger")
+    }
+}