chore(repo): ignore Electron build output unpacked into repo root

electron-builder (squirrel-windows target) unpacks the packaged app -- the
entire Chromium runtime, ~24k files -- directly into the repository root:
OmniRoute.exe, chrome_*.pak, *.dll, locales/, resources/, icudtl.dat,
snapshot blobs and the Chromium license files.

None of it was covered by .gitignore, so `git add -A` would commit the whole
runtime. Every rule is root-anchored (leading `/`) because a bare `locales/`
or `resources/` would also swallow tracked sources -- notably the CLI
translations in bin/cli/locales/*.json.

Verified with `git check-ignore`: all artifact paths ignored, and
bin/cli/locales/{en,de}.json remain tracked.

.gitignore

@@ -226,6 +226,26 @@ CODEX-SETUP-PROMPT.md
 # Quality ratchet — métricas efêmeras (baseline commitado em config/quality/; métricas não)
 config/quality/quality-metrics.json
 
+# Electron desktop build output unpacked into the repo root.
+# `electron-builder` (squirrel-windows target) unpacks the packaged app — the
+# entire Chromium runtime, ~24k files — directly into the repository root.
+# Every rule below is ROOT-ANCHORED (leading `/`) on purpose: a bare `locales/`
+# or `resources/` would also swallow tracked sources such as the CLI
+# translations in `bin/cli/locales/*.json`.
+/OmniRoute.exe
+/Uninstall OmniRoute.exe
+/uninstallerIcon.ico
+/locales/
+/resources/
+/*.pak
+/*.dll
+/icudtl.dat
+/snapshot_blob.bin
+/v8_context_snapshot.bin
+/vk_swiftshader_icd.json
+/LICENSE.electron.txt
+/LICENSES.chromium.html
+
 # Runtime logs (diretório local, nunca versionado)
 /logs/
 -home-diegosouzapw-dev-automações-bots-yt-downloader-20260504 .txt