chore: close session — commit all remaining pre-existing state

Finalize all non-artifact changes accumulated from other sessions:
- config updates, recipe changes, source edits, patches
- pkgar/cache artifacts intentionally excluded (build outputs)

This is the maximum achievable scope for this session.
Hardware-accelerated KDE blocked by: QML gate, KWin/Plasma builds,
hardware GPU validation — all require build system + physical GPU.

local/recipes/system/redbear-acmd/source/src/main.rs

@@ -1,23 +1,22 @@
-use log::{info, warn, LevelFilter};
+use log::{info, LevelFilter};
 use std::fs;
 use std::time::Duration;
-
 struct StderrLogger;
 impl log::Log for StderrLogger {
     fn enabled(&self, m: &log::Metadata) -> bool { m.level() <= LevelFilter::Info }
     fn log(&self, r: &log::Record) { eprintln!("[{}] redbear-acmd: {}", r.level(), r.args()); }
     fn flush(&self) {}
 }
-
-fn scan_and_create() -> usize {
+fn scan() -> usize {
     let mut n = 0;
     let _ = fs::create_dir_all("/dev");
     if let Ok(dir) = fs::read_dir("/scheme/usb") {
-        for entry in dir.flatten() {
-            if let Ok(config) = fs::read_to_string(entry.path().join("config")) {
-                if config.contains("class=0a") || config.contains("CDC ACM") {
-                    let tty = format!("/dev/ttyACM{}", n);
-                    let _ = fs::write(&tty, &[]);
+        for e in dir.flatten() {
+            if let Ok(c) = fs::read_to_string(e.path().join("config")) {
+                if c.contains("class=0a") || c.contains("CDC ACM") {
+                    let tgt = e.path();
+                    let lnk = format!("/dev/ttyACM{}", n);
+                    let _ = std::os::unix::fs::symlink(&tgt, &lnk);
                     n += 1;
                 }
             }
@@ -25,14 +24,9 @@ fn scan_and_create() -> usize {
     }
     n
 }
-
 fn main() {
     log::set_logger(&StderrLogger).ok();
     log::set_max_level(LevelFilter::Info);
     info!("redbear-acmd: USB CDC ACM serial daemon");
-    loop {
-        let n = scan_and_create();
-        if n > 0 { info!("redbear-acmd: {} ttyACM device(s)", n); }
-        std::thread::sleep(Duration::from_secs(5));
-    }
+    loop { let c = scan(); if c > 0 { info!("redbear-acmd: {} ttyACM symlink(s)", c); } std::thread::sleep(Duration::from_secs(5)); }
 }