docs(wiki): full English pass + update for v1.7.13 and built-in scale gateway

- Features.md: translate all Italian UI strings to English (chat examples,
  Avvia cottura → Start Cooking, Spiega → Explain, La quantità è giusta → correct)
- Android-Kiosk.md: translate Italian button labels (Concedi permessi →
  Grant permissions, Rileva automaticamente → Auto-discover); fix
  REQUEST_INSTALL_PACKAGES description (OTA kiosk self-updates, not scale APK);
  fix REORDER_TASKS description; add 'Header Overlay Buttons' section documenting
  the three web overlay buttons (✕ ↻ ⚙️) and the permanent native button hiding
- Scale-Gateway.md: translate Italian button labels (Cerca Bilance Bluetooth →
  Find Bluetooth Scales, Leggi bilancia → Read Scale, Disconnetti/Riconnetti →
  Disconnect/Reconnect)
- FAQ.md: translate all Italian strings (AI non disponibile → AI not available,
  Bring! non configurato, Leggi bilancia, Carica altri → Load more); replace
  outdated 'Gateway install fails' section (separate APK no longer exists for
  kiosk users) with 'Kiosk app update fails'; update ✕ button description to
  reflect the new 3-button overlay (✕ ↻ ⚙️); restore missing Getting Help section
- Home.md: update What's New v1.7.13 with complete list of changes; mark
  evershelf-scale-gateway/ as DEPRECATED in repo structure

docs/wiki/Home.md

@@ -47,8 +47,11 @@ All data stays on your server. No cloud, no subscriptions.
 ## 🆕 What's New
 
 ### v1.7.13 (2026-05-16)
-- **Critical fix:** Fresh-install crash resolved — `transactions` schema was missing the `undone` column, causing a database failure on every new installation
-- **Fix:** Race condition in DB migrations no longer causes `duplicate column name` errors on concurrent first requests
+- **Fix:** Kiosk Settings button (⚙️) added to the web overlay — tapping the camera button no longer accidentally opens kiosk settings
+- **Fix:** Opened-item expiry badge is now consistent with the top banner: low-risk items (jams, condiments) show amber ⚠️ "Check soon" instead of misleading red ⛔ "Expired"
+- **Cooking Mode:** 3D wheel UI with perspective card flip, ghost steps (prev/next), float animation, and full `prefers-reduced-motion` support
+- **CI:** `data/category_ai_cache.json` added to `.gitignore`
+- **Critical fix (DB):** Fresh-install crash resolved — `transactions` schema was missing the `undone` column
 
 ### v1.7.12 (2026-05-13)
 - "Use first" banner now shows opening date and location instead of a confusing calculated expiry
@@ -81,7 +84,7 @@ EverShelf/
 ├── translations/               # i18n JSON files (it, en, de)
 ├── docs/openapi.yaml           # OpenAPI 3.0 spec
 ├── evershelf-kiosk/            # Android kiosk app (Kotlin)
-└── evershelf-scale-gateway/    # Android BLE gateway app (Kotlin)
+└── evershelf-scale-gateway/    # Android BLE gateway app (Kotlin) — DEPRECATED, built into kiosk since v1.6.0
 ```
 
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