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/tests/pdf.rs

@@ -1,4 +1,4 @@
-//! Relatório em PDF: estrutura do arquivo (xref, páginas), texto com acentos e paginação.
+//! PDF report generator tests: xref table offsets, WinAnsi accented text escaping, and multi-page tables.
 
 use guara_core::recover::{RecoverReport, RecoveredFile};
 use guara_core::report::{self, AuditNote, CaseInfo, ReportInput};
@@ -81,7 +81,7 @@ fn find(hay: &[u8], needle: &[u8], from: usize) -> Option<usize> {
         .map(|p| p + from)
 }
 
-/// Texto dos fluxos de conteúdo, já descomprimidos.
+/// Concatenates all uncompressed content streams in the generated PDF.
 fn streams(pdf: &[u8]) -> Vec<String> {
     let mut out = vec![];
     let mut at = 0;
@@ -107,7 +107,7 @@ fn pdf_has_a_valid_cross_reference_table() {
     let nl = find(&pdf, b"\n", sx).unwrap();
     let xref: usize = std::str::from_utf8(&pdf[sx..nl]).unwrap().parse().unwrap();
     assert_eq!(&pdf[xref..xref + 4], b"xref");
-    // cada entrada aponta exatamente para "N 0 obj"
+    // every xref entry offset points directly to `"N 0 obj"`
     let table = &pdf[xref..];
     let header_end = find(table, b"\n", 5).unwrap();
     let count: usize = std::str::from_utf8(&table[5..header_end])
@@ -128,14 +128,14 @@ fn pdf_has_a_valid_cross_reference_table() {
 #[test]
 fn pdf_text_survives_accents_and_escaping() {
     let all = streams(&build(5)).join("\n");
-    // acentos viram bytes WinAnsi em octal; parênteses e barra são escapados
+    // Latin-1 accents encode as WinAnsi octal escapes; parentheses and backslashes are escaped
     assert!(all.contains("Identifica\\347\\343o do caso"), "{all}");
     assert!(all.contains("Perita \\(Ana\\) \\\\ Souza"));
     assert!(all.contains("Laborat\\363rio"));
     assert!(all.contains("fotografia_0003.jpg"));
     assert!(all.contains(&"ab".repeat(32)));
     assert!(all.contains(&"12".repeat(32)), "hash da trilha ausente");
-    // aspas curvas viram os bytes WinAnsi 0x93/0x94
+    // curly quotes map to WinAnsi `0x93`/`0x94` (`\223`/`\224`)
     assert!(all.contains("\\223aspas\\224"));
 }
 
@@ -147,12 +147,12 @@ fn long_lists_paginate_with_numbered_footers() {
     let last = pages.len();
     assert!(pages[last - 1].contains(&format!("p\\341gina {last} de {last}")));
     assert!(pages[0].contains(&format!("p\\341gina 1 de {last}")));
-    // o cabeçalho da tabela se repete nas páginas seguintes
+    // the table header row is repeated at the top of each continuation page
     assert!(pages[2].contains("Modificado \\(UTC\\)"));
-    // todas as linhas aparecem exatamente uma vez
+    // every table row appears exactly once across all pages
     let all = pages.join("\n");
     assert_eq!(all.matches("fotografia_0399.jpg").count(), 1);
-    // a primeira também consta da lista de recuperados
+    // `arq-000.jpg` appears both in the findings table and in the recovered files section
     assert_eq!(all.matches("fotografia_0000.jpg").count(), 2);
 }