feat(mining): migrate the Windows Defender antivirus-help dialog to reference design

Bring renderAntivirusHelpDialog onto the reference design and remove its hardcoded
English (the last Wave-1 modal):
- struct-form BeginOverlayDialog(OverlayDialogSpec{BlurFloat, cardWidth 560,
  idSuffix antivirus}) replacing the legacy positional overload
- the hardcoded "Windows Defender Blocked Miner" title and all 10 step/intro/bullet
  strings -> TR() (11 new av_* keys + reuse `close`; 8-lang translations, Windows
  env vars / xmrig.exe kept literal, menu names localized)
- 2 StyledButton -> TactileButton, drop the footer divider, dp-scale the button widths
- CJK subset rebuilt (glyphs 1741->1751; kept — new glyphs are used)

NOTE: this dialog is inside #ifdef _WIN32, so the Linux build compiles it out and
cannot verify it — needs a Windows build to compile-check. The edits mirror the
already-verified daemon-update-prompt / migrate-to-seed struct-overlay pattern and
leave the ShellExecuteA call untouched. i18n.cpp + the daemon prompt (cross-platform)
build + ctest + hygiene clean on Linux.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

res/lang/fr.json

@@ -55,6 +55,17 @@
     "amount_label": "Montant :",
     "appearance": "APPARENCE",
     "auto_shield": "Auto-blindage du minage",
+    "av_intro": "Les logiciels de minage sont souvent signalés comme potentiellement indésirables. Suivez ces étapes pour activer le minage en pool :",
+    "av_open_security": "Ouvrir Sécurité Windows",
+    "av_step1": "Étape 1 : Ajouter une exclusion",
+    "av_step1_b1": "Ouvrez Sécurité Windows > Protection contre les virus et menaces",
+    "av_step1_b2": "Cliquez sur Gérer les paramètres > Exclusions > Ajouter ou supprimer",
+    "av_step1_b3": "Ajoutez le dossier : %APPDATA%\\ObsidianDragon\\",
+    "av_step2": "Étape 2 : Restaurer depuis la quarantaine (si nécessaire)",
+    "av_step2_b1": "Sécurité Windows > Historique de protection",
+    "av_step2_b2": "Trouvez xmrig.exe et cliquez sur Restaurer",
+    "av_step3": "Étape 3 : Redémarrez le portefeuille et réessayez",
+    "av_title": "Windows Defender a bloqué le mineur",
     "available": "Disponible",
     "backup_backing_up": "Sauvegarde en cours...",
     "backup_create": "Créer une sauvegarde",