Sell PRO as an in-app unlock, take shared photos, and let FX run negative

- One free Play app (com.locphamtran.recipescamera) with an expo-iap PRO
  unlock, replacing the paid apk for the store channel
- Android SEND/SEND_MULTIPLE share target feeds photos into the editor,
  on cold start and on resume
- BACK button in the TopBar and press-and-hold PEEK replace the chip row
- NOISE REDUCTION and SHARPENING accept -10: a negative SHARPENING softens
  the frame before the grain pass, a negative NOISE REDUCTION re-grains it,
  in the Skia engine, the live preview and the Kotlin export path alike

android/app/src/main/AndroidManifest.xml

@@ -27,6 +27,17 @@
         <action android:name="android.intent.action.MAIN"/>
         <category android:name="android.intent.category.LAUNCHER"/>
       </intent-filter>
+      <!-- Share target. Without this filter the app never appears in the
+           system share sheet at all; image/* only, the editor takes photos.
+           Goes on the launcher activity: it is singleTask, so a share
+           re-delivered there replaces its intent (onNewIntent -> setIntent)
+           and the running app picks the photo up without a cold start. -->
+      <intent-filter>
+        <action android:name="android.intent.action.SEND"/>
+        <action android:name="android.intent.action.SEND_MULTIPLE"/>
+        <category android:name="android.intent.category.DEFAULT"/>
+        <data android:mimeType="image/*"/>
+      </intent-filter>
       <intent-filter>
         <action android:name="android.intent.action.VIEW"/>
         <category android:name="android.intent.category.DEFAULT"/>

android/app/src/main/java/com/locphamtran/recipescamera/MainActivity.kt

@@ -1,5 +1,6 @@
 package com.locphamtran.recipescamera
 
+import android.content.Intent
 import android.os.Build
 import android.os.Bundle
 
@@ -19,6 +20,17 @@ class MainActivity : ReactActivity() {
     super.onCreate(null)
   }
 
+  /**
+   * A share delivered to the running app lands here, and React Native never hands
+   * the new intent to the activity (nothing in ReactActivity/ReactDelegate calls
+   * setIntent) — so getIntent() keeps returning the launch intent and the share
+   * intake would read a photo the user shared minutes ago, or none at all.
+   */
+  override fun onNewIntent(intent: Intent) {
+    setIntent(intent)
+    super.onNewIntent(intent)
+  }
+
   /**
    * Returns the name of the main component registered from JavaScript. This is used to schedule
    * rendering of the component.