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/search.rs

@@ -1,5 +1,5 @@
-//! Busca de texto bruta em todo o disco (inclusive espaço livre e não particionado),
-//! em UTF-8 e UTF-16LE, útil quando não há estrutura de arquivo para recuperar.
+//! Raw full-disk text search (including free and unpartitioned space)
+//! across UTF-8 and UTF-16LE encodings, useful when filesystem structures are gone.
 
 use crate::source::Source;
 use serde::{Deserialize, Serialize};
@@ -7,10 +7,10 @@ use serde::{Deserialize, Serialize};
 #[derive(Debug, Clone, Serialize, Deserialize)]
 pub struct SearchOpts {
     pub terms: Vec<String>,
-    /// Ignora maiúsculas/minúsculas (letras ASCII).
+    /// Case-insensitive matching (ASCII letters).
     #[serde(default = "yes")]
     pub ignore_case: bool,
-    /// Procura também a codificação UTF-16 (Windows, Office, bancos de dados).
+    /// Also match UTF-16LE encoded strings (Windows, Office, SQLite, etc.).
     #[serde(default = "yes")]
     pub utf16: bool,
     #[serde(default = "default_max")]
@@ -116,7 +116,7 @@ fn snippet(buf: &[u8], at: usize, len: usize, utf16: bool) -> String {
         .collect()
 }
 
-/// Varre `src` inteira. Retorna o total de ocorrências. `on_hit` pode devolver false para parar.
+/// Scans `src` from start to end. Returns total matches found; `on_hit` may return `false` to stop.
 pub fn search(
     src: &dyn Source,
     o: &SearchOpts,
@@ -144,7 +144,7 @@ pub fn search(
                 Ok(0) => break,
                 Ok(n) => got += n,
                 Err(_) => {
-                    // setor ruim: pula este trecho
+                    // unreadable chunk: skip and continue
                     for b in &mut buf[got..want] {
                         *b = 0;
                     }
@@ -155,7 +155,7 @@ pub fn search(
         if got == 0 {
             break;
         }
-        let fresh = got.min(CHUNK); // início de ocorrências aceitas neste bloco
+        let fresh = got.min(CHUNK); // start offsets of accepted hits within this chunk (prevents duplicate UTF-8/16 hits at same pos)
         let folded: Vec<u8>;
         let hay: &[u8] = if o.ignore_case {
             folded = buf[..got].to_ascii_lowercase();
@@ -163,7 +163,7 @@ pub fn search(
         } else {
             &buf[..got]
         };
-        let mut chunk_hits: Vec<(usize, usize)> = vec![]; // (offset no bloco, índice do padrão)
+        let mut chunk_hits: Vec<(usize, usize)> = vec![]; // (offset_in_chunk, pattern_index)
         for (pi, p) in pats.iter().enumerate() {
             find_all(hay, p, |i| {
                 if i < fresh {