feat: merge rustore test UI and unify SKU format across channels

- Merge VK login/link/check and Review test buttons from dev_rustore
- Unify Rustore/GooglePlay SKU format via ChannelHelpers.normalizeSkuList()
- Fix ChannelConfig runtime sync: Java InitSDK sets channel from ChannelHelpers.CHANNEL
- Fix AndroidMinSdkVersion 25→26 for tuyoosdk compatibility
- Fix Flexion AndroidManifest tools:replace missing fullBackupContent value
- Add [CHANNEL-VERIFY] debug logs for channel verification

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

ExtraPluginCfgs/Android/flexion/AndroidManifest.xml

@@ -7,7 +7,7 @@
     <uses-permission android:name="android.permission.POST_NOTIFICATIONS"/>
     <uses-permission android:name="android.permission.READ_PHONE_STATE" />
     <application android:extractNativeLibs="true" android:name="com.unity3d.player.TYApp"
-    tools:replace="android:usesCleartextTraffic,android:fullBackupContent"
+    tools:replace="android:usesCleartextTraffic"
     android:usesCleartextTraffic="true">
         <activity android:name="com.unity3d.player.TYUnityActivity"
                   android:theme="@style/UnityThemeSelector">

ExtraPluginCfgs/Android/flexion/ChannelHelpers.java

@@ -1,9 +1,17 @@
 package com.unity3d.player;
 
 public class ChannelHelpers {
+    
     public static final String CHANNEL = "Flexion";
 
     static void register() {
         SDKManager.registerHelper(CHANNEL, new FlexionSDKHelper());
     }
+
+
+    // Flexion provides price in micros and currency code, so no normalization needed
+    // 支付的变化，可能会修改这里
+    public static String normalizeSkuList(String msg) {
+        return msg;
+    }
 }

ExtraPluginCfgs/Android/googleplay/ChannelHelpers.java

@@ -6,4 +6,8 @@ public class ChannelHelpers {
     static void register() {
         // GooglePlay uses default behavior, no additional SDKHelper
     }
+
+    public static String normalizeSkuList(String msg) {
+        return msg;
+    }
 }

ExtraPluginCfgs/Android/rustore/AndroidManifest.xml

@@ -6,8 +6,9 @@
     <uses-permission android:name="android.permission.VIBRATE" />
     <uses-permission android:name="android.permission.POST_NOTIFICATIONS"/>
     <uses-permission android:name="android.permission.READ_PHONE_STATE" />
-    <application android:extractNativeLibs="true" android:name="com.unity3d.player.TYApp" 
+    <application android:extractNativeLibs="true" android:name="com.unity3d.player.TYApp"
     tools:replace="android:usesCleartextTraffic"
+    tools:overrideLibrary="com.tuyoo.gamesdk"
     android:usesCleartextTraffic="true">
         <activity android:name="com.unity3d.player.TYUnityActivity"
                   android:theme="@style/UnityThemeSelector">

ExtraPluginCfgs/Android/rustore/ChannelHelpers.java

@@ -1,9 +1,44 @@
 package com.unity3d.player;
 
+import android.util.Log;
+
+import org.json.JSONArray;
+import org.json.JSONException;
+import org.json.JSONObject;
+
 public class ChannelHelpers {
     public static final String CHANNEL = "Rustore";
 
     static void register() {
-        // Rustore uses default behavior, no additional SDKHelper yet
+        // Rustore uses default behavior, no additional SDKHelper
+    }
+
+    public static String normalizeSkuList(String msg) {
+        if (msg == null || msg.isEmpty()) return msg;
+        try {
+            JSONArray products = new JSONArray(msg);
+            for (int i = 0; i < products.length(); i++) {
+                JSONObject p = products.getJSONObject(i);
+
+                // price is in kopecks, convert to micros: kopecks * 10000
+                String price = p.optString("price", "0");
+                long micros = Long.parseLong(price) * 10000;
+                p.put("price_amount_micros", String.valueOf(micros));
+
+                // Map currency → price_currency_code
+                String currency = p.optString("currency", "");
+                if (!currency.isEmpty()) {
+                    p.put("price_currency_code", currency);
+                }
+
+                // Convert display price: "199" → "₽1.99"
+                float rubles = Float.parseFloat(price) / 100;
+                p.put("price", String.format("₽%s", rubles));
+            }
+            return products.toString();
+        } catch (JSONException e) {
+            Log.e("ChannelHelpers", "normalizeSkuList error: " + e.getMessage());
+            return msg;
+        }
     }
 }