Added connected devices. Improved logging. UI fixes

src/config/mod.rs

@@ -2,7 +2,54 @@ pub mod keymap;
 pub mod logging;
 
 use directories::ProjectDirs;
+use std::fs;
+use std::path::PathBuf;
+use std::time::{SystemTime, UNIX_EPOCH};
 
 pub fn project_dirs() -> Option<ProjectDirs> {
     ProjectDirs::from("", "", "furumi")
 }
+
+pub fn device_id_path() -> Option<PathBuf> {
+    project_dirs().map(|dirs| dirs.config_dir().join("device_id"))
+}
+
+pub fn load_or_create_device_id() -> String {
+    if let Some(path) = device_id_path() {
+        if let Ok(raw) = fs::read_to_string(&path) {
+            let id = raw.trim();
+            if valid_device_id(id) {
+                return id.to_string();
+            }
+        }
+
+        let id = generate_device_id();
+        if let Some(parent) = path.parent() {
+            if let Err(err) = fs::create_dir_all(parent) {
+                tracing::warn!(path = %parent.display(), %err, "failed to create config directory");
+                return id;
+            }
+        }
+        if let Err(err) = fs::write(&path, &id) {
+            tracing::warn!(path = %path.display(), %err, "failed to persist device id");
+        }
+        return id;
+    }
+    generate_device_id()
+}
+
+fn valid_device_id(id: &str) -> bool {
+    !id.is_empty()
+        && id.len() <= 128
+        && id
+            .chars()
+            .all(|ch| ch.is_ascii_alphanumeric() || ch == '-' || ch == '_')
+}
+
+fn generate_device_id() -> String {
+    let nanos = SystemTime::now()
+        .duration_since(UNIX_EPOCH)
+        .map(|d| d.as_nanos())
+        .unwrap_or(0);
+    format!("tui-{nanos:x}-{:x}", std::process::id())
+}