chore(i18n): finish translating code comments and scripts to English

Completes the English-only standardization for code, comments, scripts
and CI templates (UI/CLI-facing strings stay bilingual pt-BR/en,
untouched). Covers the remaining crates/, apps/gui/ui/ and
apps/gui/src-tauri/ comments, .gitea/ workflow and template comments,
.githooks/ hooks, and the scripts/ source comments for the files
already renamed in a prior commit (check.sh, generate-logo.py,
install-hooks.sh).

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01VAyr8d7HuAdUGB6aA5xmDD

crates/guara-core/src/notify.rs

@@ -1,11 +1,11 @@
-//! Notificações do sistema (varredura concluída, disco desconectado...), usando os
-//! comandos nativos de cada sistema, sem dependências extras.
+//! Native OS desktop notifications (scan finished, disk disconnected, etc.) using
+//! standard platform CLI tools with zero extra crate dependencies.
 
 use std::process::{Command, Stdio};
 
-/// Avisos que o núcleo envia ao sistema operacional. O texto é montado no
-/// idioma efetivo da interface (`settings::ui_lang`), porque notificações não
-/// passam pelo dicionário do DOM.
+/// Notification events emitted by the core. Messages are formatted in the
+/// effective UI language (`settings::ui_lang`) since OS notifications bypass
+/// the DOM i18n translator.
 pub enum Notice {
     ScanDone { count: usize, target: String },
     RecoverDone { count: usize, destination: String },
@@ -53,7 +53,7 @@ impl Notice {
     }
 }
 
-/// Envia uma notificação sem bloquear. Falhas são ignoradas (é só um aviso).
+/// Sends a desktop notification asynchronously. Failures are silently ignored.
 pub fn send(notice: Notice) {
     let (title, body) = notice.text(&crate::settings::ui_lang());
     std::thread::spawn(move || {
@@ -72,7 +72,7 @@ pub fn send(notice: Notice) {
 
 #[cfg(target_os = "linux")]
 fn command(title: &str, body: &str) -> Option<Command> {
-    // Como root, notifica na sessão do usuário real.
+    // When running as root, dispatch the notification inside the real user's session.
     let mut c = if let Some(u) = crate::owner::invoking_user() {
         let mut c = Command::new("runuser");
         c.args(["-u", &u.name, "--", "env"]);