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

.githooks/commit-msg

@@ -0,0 +1,42 @@
+#!/usr/bin/env bash
+# Enforces Conventional Commits 1.0.0 and English-only commit messages.
+set -euo pipefail
+
+msg_file="${1:?usage: commit-msg <file>}"
+python3 - "$msg_file" <<'PY'
+import re, sys
+from pathlib import Path
+
+raw = Path(sys.argv[1]).read_text(encoding="utf-8")
+lines = [l for l in raw.splitlines() if not l.startswith("#")]
+while lines and not lines[0].strip():
+    lines.pop(0)
+if not lines:
+    sys.exit("commit-msg: empty commit message")
+
+subject = lines[0].strip()
+if subject.startswith(("Merge ", "Revert \"")):
+    sys.exit(0)
+
+conv_re = re.compile(
+    r"^(feat|fix|chore|ci|docs|refactor|test|perf|build|style|revert)(\([a-z0-9_./-]+\))?!?: .+$"
+)
+if not conv_re.match(subject):
+    sys.exit(
+        f"commit-msg: invalid Conventional Commit header: {subject!r}\n"
+        "Expected: <type>[optional scope]: <description in English>\n"
+        "Allowed types: feat, fix, chore, ci, docs, refactor, test, perf, build, style, revert"
+    )
+
+body = "\n".join(lines)
+cleaned = re.sub(r"\b(Guará|Sabiá|Acauã|Ciberfauna)\b", "", body)
+pt_accents = re.search(r"[áàâãéêíóôõúçÁÀÂÃÉÊÍÓÔÕÚÇ]", cleaned)
+pt_words = re.search(
+    r"\b(não|para|como|quando|então|pelos|pelas|pelo|pela|estão|está|também|versão|"
+    r"corrige|adiciona|atualiza|remove|padroniza|implementa|ajusta|arquivo|arquivos)\b",
+    cleaned,
+    re.I,
+)
+if pt_accents or pt_words:
+    sys.exit("commit-msg: commit messages must be written 100% in English.")
+PY