fix: scale indicator, logo crop, gateway LAN IP, setup spacing

webapp:
- Scale indicator: replace plain green dot with ⚖️ emoji + colored
  status badge (green/amber/grey/red); icon fades out when disconnected;
  tap shows a toast with device name + battery level
- Logo images: crop excess transparent padding from logo.png and
  logo_icon.png so content fills the frame at small display sizes
- style.css: reworked .scale-status-indicator CSS for emoji+badge

kiosk:
- SetupActivity: use device's real LAN IP for scale_gateway_url
  (was hardcoded 127.0.0.1 — only worked if server and kiosk run on
  the same machine); added getDeviceLanIp() helper (prefers wlan/eth)
- activity_setup.xml: reduce welcome step padding/margins so step 1
  fits on screen without scrolling; text sizes slightly reduced
- activity_setup.xml: fix feature bullet 'Bilancia Bluetooth via
  Gateway app' → 'Bilancia BLE integrata (nessuna app esterna)'
- strings.xml (en + it): rewrite all wizard_gateway_* strings to
  reflect integrated BLE service instead of external gateway APK
- ic_logo.png: regenerated at all densities from cropped source

evershelf-kiosk/app/src/main/kotlin/it/dadaloop/evershelf/kiosk/SetupActivity.kt

@@ -866,7 +866,10 @@ class SetupActivity : AppCompatActivity() {
                     val body = buildString {
                         append("{\"screensaver_enabled\":$screensaver")
                         if (hasScale) {
-                            append(",\"scale_enabled\":true,\"scale_gateway_url\":\"ws://127.0.0.1:8765\"")
+                            // Use the tablet's actual LAN IP so the EverShelf server
+                            // (potentially on a different machine) can reach the gateway.
+                            val lanIp = getDeviceLanIp() ?: "127.0.0.1"
+                            append(",\"scale_enabled\":true,\"scale_gateway_url\":\"ws://$lanIp:8765\"")
                         }
                         append("}")
                     }
@@ -886,4 +889,32 @@ class SetupActivity : AppCompatActivity() {
         setResult(RESULT_OK)
         finish()
     }
+
+    /**
+     * Returns the device's best LAN IPv4 address (Wi-Fi/Ethernet preferred).
+     * Skips loopback, VPN tunnels, and cellular interfaces.
+     */
+    private fun getDeviceLanIp(): String? {
+        val skipPrefixes = listOf("tun", "ppp", "rmnet", "pdp", "v4-", "v6-", "ccmni", "sit", "gre")
+        var fallback: String? = null
+        try {
+            val ifaces = NetworkInterface.getNetworkInterfaces() ?: return null
+            while (ifaces.hasMoreElements()) {
+                val intf = ifaces.nextElement()
+                if (!intf.isUp || intf.isLoopback) continue
+                val name = intf.name.lowercase()
+                if (skipPrefixes.any { name.startsWith(it) }) continue
+                for (addr in intf.interfaceAddresses) {
+                    val ip = addr.address
+                    if (ip is java.net.Inet4Address && !ip.isLoopbackAddress) {
+                        val ipStr = ip.hostAddress ?: continue
+                        // Wi-Fi/Ethernet first
+                        if (name.startsWith("wlan") || name.startsWith("eth")) return ipStr
+                        if (fallback == null) fallback = ipStr
+                    }
+                }
+            }
+        } catch (_: Exception) {}
+        return fallback
+    }
 }

evershelf-kiosk/app/src/main/res/layout/activity_setup.xml

@@ -55,8 +55,8 @@
             android:gravity="center_horizontal"
             android:paddingStart="28dp"
             android:paddingEnd="28dp"
-            android:paddingTop="32dp"
-            android:paddingBottom="40dp">
+            android:paddingTop="16dp"
+            android:paddingBottom="24dp">
 
             <!-- ════════════════════════════════════════════
                  STEP 0 — Language selection
@@ -139,7 +139,7 @@
                     android:src="@drawable/ic_logo"
                     android:adjustViewBounds="true"
                     android:scaleType="fitCenter"
-                    android:layout_marginBottom="20dp"
+                    android:layout_marginBottom="10dp"
                     android:contentDescription="EverShelf" />
 
                 <TextView
@@ -147,19 +147,19 @@
                     android:layout_height="wrap_content"
                     android:text="EverShelf Kiosk"
                     android:textColor="#f1f5f9"
-                    android:textSize="30sp"
+                    android:textSize="28sp"
                     android:textStyle="bold"
                     android:gravity="center"
-                    android:layout_marginBottom="8dp" />
+                    android:layout_marginBottom="4dp" />
 
                 <TextView
                     android:layout_width="wrap_content"
                     android:layout_height="wrap_content"
                     android:text="La tua dispensa smart in cucina"
                     android:textColor="#7c3aed"
-                    android:textSize="16sp"
+                    android:textSize="15sp"
                     android:gravity="center"
-                    android:layout_marginBottom="28dp" />
+                    android:layout_marginBottom="16dp" />
 
                 <!-- What is EverShelf -->
                 <TextView
@@ -167,10 +167,10 @@
                     android:layout_height="wrap_content"
                     android:text="Trasforma il tuo tablet in un pannello da cucina sempre attivo. Gestisci la dispensa, scansiona i prodotti, ricevi suggerimenti intelligenti — tutto dal tuo server di casa."
                     android:textColor="#94a3b8"
-                    android:textSize="15sp"
+                    android:textSize="14sp"
                     android:gravity="center"
-                    android:lineSpacingExtra="4dp"
-                    android:layout_marginBottom="28dp" />
+                    android:lineSpacingExtra="3dp"
+                    android:layout_marginBottom="16dp" />
 
                 <!-- Privacy card (highlighted) -->
                 <LinearLayout
@@ -178,8 +178,8 @@
                     android:layout_height="wrap_content"
                     android:orientation="vertical"
                     android:background="@drawable/card_background"
-                    android:padding="20dp"
-                    android:layout_marginBottom="24dp">
+                    android:padding="16dp"
+                    android:layout_marginBottom="16dp">
 
                     <TextView
                         android:layout_width="wrap_content"
@@ -265,9 +265,8 @@
                     android:layout_height="wrap_content"
                     android:orientation="vertical"
                     android:background="@drawable/tip_background"
-                    android:padding="16dp"
-                    android:layout_marginBottom="32dp">
-
+                android:padding="14dp"
+                android:layout_marginBottom="16dp">
                     <TextView
                         android:layout_width="match_parent"
                         android:layout_height="wrap_content"
@@ -289,7 +288,7 @@
                     <TextView
                         android:layout_width="match_parent"
                         android:layout_height="wrap_content"
-                        android:text="⚖️  Bilancia Bluetooth via Gateway app"
+                        android:text="⚖️  Bilancia BLE integrata (nessuna app esterna)"
                         android:textColor="#cbd5e1"
                         android:textSize="14sp"
                         android:paddingTop="4dp"

evershelf-kiosk/app/src/main/res/values-it/strings.xml

@@ -17,21 +17,21 @@
     <string name="setup_exit_cancel">Continua</string>
 
     <!-- Wizard Step 3: Bilancia smart -->
-    <string name="wizard_step3_title">Bilancia Smart (Opzionale)</string>
-    <string name="wizard_step3_description">Per usare una bilancia da cucina Bluetooth, devi installare l\'app EverShelf Scale Gateway separatamente.</string>
+    <string name="wizard_step3_title">Bilancia Smart</string>
+    <string name="wizard_step3_description">EverShelf Kiosk include un gateway Bluetooth integrato — nessuna app esterna necessaria. Seleziona la tua bilancia qui sotto.</string>
     <string name="wizard_step3_question">Hai una bilancia smart Bluetooth?</string>
     <string name="wizard_step3_yes">✅  Sì, ho una bilancia</string>
     <string name="wizard_step3_no">➡️  No, salta questo passaggio</string>
 
     <!-- Messaggi stato gateway -->
-    <string name="wizard_gateway_installed">Scale Gateway installato ✅</string>
-    <string name="wizard_gateway_installed_detail">Verrà avviato in background quando procedi.</string>
-    <string name="wizard_gateway_not_installed">Scale Gateway non installato</string>
-    <string name="wizard_gateway_not_installed_detail">Installa l\'app Scale Gateway per usare una bilancia Bluetooth.</string>
-    <string name="wizard_gateway_checking">Controllo aggiornamenti…</string>
-    <string name="wizard_gateway_up_to_date">Scale Gateway è aggiornato.</string>
-    <string name="wizard_gateway_update_available">Aggiornamento disponibile per Scale Gateway</string>
-    <string name="wizard_gateway_update_detail">Tocca il pulsante qui sotto per aggiornarlo ora.</string>
+    <string name="wizard_gateway_installed">Bilancia salvata ✅</string>
+    <string name="wizard_gateway_installed_detail">Il gateway BLE integrato si collegherà automaticamente all\'avvio.</string>
+    <string name="wizard_gateway_not_installed">Nessuna bilancia selezionata</string>
+    <string name="wizard_gateway_not_installed_detail">Scansiona le bilance BLE nelle vicinanze e tocca una per selezionarla.</string>
+    <string name="wizard_gateway_checking">Scansione bilance BLE in corso…</string>
+    <string name="wizard_gateway_up_to_date">Servizio BLE bilancia pronto.</string>
+    <string name="wizard_gateway_update_available">Bilancia BLE trovata</string>
+    <string name="wizard_gateway_update_detail">Tocca la bilancia nell\'elenco per connettersi.</string>
 
     <!-- Stati scaricamento / installazione -->
     <string name="install_downloading">Scaricamento in corso…</string>

evershelf-kiosk/app/src/main/res/values/strings.xml

@@ -16,21 +16,21 @@
     <string name="setup_exit_cancel">Continue</string>
 
     <!-- Wizard Step 3: Smart scale -->
-    <string name="wizard_step3_title">Smart Scale (Optional)</string>
-    <string name="wizard_step3_description">To use a Bluetooth kitchen scale, you need the EverShelf Scale Gateway app installed separately.</string>
+    <string name="wizard_step3_title">Smart Scale</string>
+    <string name="wizard_step3_description">EverShelf Kiosk includes a built-in Bluetooth gateway — no external app needed. Select your scale below.</string>
     <string name="wizard_step3_question">Do you have a Bluetooth smart scale?</string>
     <string name="wizard_step3_yes">✅  Yes, I have a scale</string>
     <string name="wizard_step3_no">➡️  No, skip this step</string>
 
     <!-- Gateway status messages -->
-    <string name="wizard_gateway_installed">Scale Gateway installed ✅</string>
-    <string name="wizard_gateway_installed_detail">Will be launched in the background when you proceed.</string>
-    <string name="wizard_gateway_not_installed">Scale Gateway not installed</string>
-    <string name="wizard_gateway_not_installed_detail">Install the Scale Gateway app to use a Bluetooth scale.</string>
-    <string name="wizard_gateway_checking">Checking for updates…</string>
-    <string name="wizard_gateway_up_to_date">Scale Gateway is up to date.</string>
-    <string name="wizard_gateway_update_available">Update available for Scale Gateway</string>
-    <string name="wizard_gateway_update_detail">Tap the button below to update it now.</string>
+    <string name="wizard_gateway_installed">Scale device saved ✅</string>
+    <string name="wizard_gateway_installed_detail">The integrated BLE gateway will connect automatically on startup.</string>
+    <string name="wizard_gateway_not_installed">No scale selected</string>
+    <string name="wizard_gateway_not_installed_detail">Scan for nearby BLE scales and tap one to select it.</string>
+    <string name="wizard_gateway_checking">Scanning for BLE scales…</string>
+    <string name="wizard_gateway_up_to_date">Scale BLE service ready.</string>
+    <string name="wizard_gateway_update_available">BLE scale found</string>
+    <string name="wizard_gateway_update_detail">Tap the scale in the list to connect.</string>
 
     <!-- Install / download progress states -->
     <string name="install_downloading">Scaricamento in corso…</string>