Phase 2A-2: Remove NFC / QR / Scan

Mirrors NativeAppTemplate-Android PR #39 (which itself mirrors iOS PR #50).
After this, the app is a generic CRUD shell with Shops and Settings tabs;
ItemTagDetailView is a placeholder (name, description, state, completedAt).

### Deletions
- NfcError; ItemTagWriteView/VM + test
- ui/scan/* (ScanView, ScanViewModel, DoScanView, DoScanViewModel,
  CompleteScanResultView, ShowTagInfoScanResultView, ScanNavigation)
  + DoScanViewModelTest
- Models: CompleteScanResult, CompleteScanResultType, ShowTagInfoScanResult,
  ShowTagInfoScanResultType, ItemTagInfoFromNdefMessage, ItemTagType,
  ScanState, ItemTagData
- Proto schemas: scan_result.proto, item_tag_data.proto,
  item_tag_info_from_ndef_message.proto
- res/raw/nfc_reader.json

### Strip / rewrite
- MainActivity: dropped NFC imports, onNewIntent, ACTION_NDEF_DISCOVERED
  handling, singleTask launch mode
- MainActivityViewModel: rewritten minimal (logout + permissions refresh +
  didShowTapShopBelowTip)
- NatAppState / NatNavHost / TopLevelDestination: dropped SCAN_TAB,
  shouldNavigateToScanView flow, navigateToScan helper, scan nav graph
- ShopDetailView / VM: dropped queue instructions block, ReadInstructionsTip,
  didShowReadInstructionsTip; renamed resetItemTag -> idleItemTag and swipe
  action "Reset" -> "Idle" (width 64dp -> 96dp)
- ShopSettingsView / VM: removed the "Reset Number Tags" section, resetShop
  flow
- ItemTagDetailView / VM: placeholder (name, description, state, completedAt)
- LoginRepository (+ Impl) / NatPreferencesDataSource: dropped scan-related
  setters/getters, didShowReadInstructionsTip
- ShopRepository / ShopApi / Impl: dropped resetShop
- ItemTagApi / Repository / Impl: renamed resetItemTag (/reset) ->
  idleItemTag (/idle)
- Utility: dropped scanUri(), extractItemTagInfoFrom(), NFC imports
- NatConstants: dropped SCAN_PATH, SCAN_PATH_CUSTOMER
- UserData: dropped didShowReadInstructionsTip,
  scanViewSelectedTabIndex, shouldFetchItemTagForShowTagInfoScan,
  shouldCompleteItemTagForCompleteScan
- shopSettingsNavigation: dropped ItemTagWriteRoute / itemTagWriteView
- Demo / test repos updated to match trimmed interfaces; obsolete tests
  removed (UtilityTest scanUri, CodedErrorTest NfcError, ItemTagDetailVMTest
  isLock, ShopDetailVMTest reset/didShowReadInstructionsTip)

### Config
- AndroidManifest.xml: removed NFC permission, android.hardware.nfc feature,
  NDEF_DISCOVERED intent-filter, singleTask launch mode
- build.gradle.kts / libs.versions.toml: removed compose-qr-code, capturable,
  lottie-compose
- user_preferences.proto: removed scan fields
- strings.xml: removed ~25 scan/NFC/QR strings; onboarding descriptions 1-13
  rewritten to generic "Welcome to the app." placeholder so OnboardingView
  still compiles (worth redesigning or deleting in a follow-up)

### Test plan
- [x] ./gradlew assembleDebug passes
- [x] ./gradlew test passes
- [x] ./gradlew spotlessCheck passes
- [x] ./gradlew lint passes
- [x] ./gradlew buildHealth passes
- [ ] Manual smoke test on device/emulator: 2 tabs visible (Shops /
  Settings), no Scan tab; sign-in works; ItemTag create / view detail
  placeholder / edit / delete flows work

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: dadachi

app/build.gradle.kts

@@ -96,13 +96,10 @@ dependencies {
   implementation(libs.androidx.navigation.compose)
   implementation(libs.androidx.profileinstaller)
   implementation(libs.androidx.tracing.ktx)
-  implementation(libs.capturable)
-  implementation(libs.compose.qr.code)
   implementation(libs.hilt.android)
   implementation(libs.kotlin.stdlib.jdk8)
   implementation(libs.kotlinx.coroutines.guava)
   implementation(libs.kotlinx.serialization.json)
-  implementation(libs.lottie.compose)
   implementation(libs.okhttp)
   implementation(libs.okhttp.logging.interceptor)
   implementation(libs.retrofit)

app/src/main/AndroidManifest.xml

@@ -5,9 +5,6 @@
   <uses-permission android:name="android.permission.INTERNET" />
   <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
 
-  <uses-permission android:name="android.permission.NFC" />
-  <uses-feature android:name="android.hardware.nfc" android:required="false" />
-
   <application
           android:name=".NativeAppTemplateApplication"
           android:allowBackup="false"
@@ -21,26 +18,13 @@
           android:networkSecurityConfig="@xml/network_security_config"
           tools:ignore="GoogleAppIndexingWarning"
           tools:targetApi="tiramisu">
-    <!--
-    `singleTask` for Background Tag Reading. Avoid running MainActivity onCreate again with Background Tag Reading.
-    https://qiita.com/takagimeow/items/48b37c55ad8d73d5da88
-    -->
     <activity
             android:name=".MainActivity"
-            android:exported="true"
-            android:launchMode="singleTask">
+            android:exported="true">
       <intent-filter>
         <action android:name="android.intent.action.MAIN" />
         <category android:name="android.intent.category.LAUNCHER" />
       </intent-filter>
-      <intent-filter>
-        <action android:name="android.nfc.action.NDEF_DISCOVERED" />
-        <category android:name="android.intent.category.DEFAULT" />
-        <data android:scheme="https"
-                android:host="api.nativeapptemplate.com"
-                android:path="/scan"
-                />
-      </intent-filter>
     </activity>
     <provider
             android:name="androidx.core.content.FileProvider"
@@ -52,4 +36,4 @@
               android:resource="@xml/filepaths" />
     </provider>
   </application>
-</manifest>
+</manifest>

app/src/main/kotlin/com/nativeapptemplate/nativeapptemplatefree/MainActivity.kt

@@ -1,10 +1,6 @@
 package com.nativeapptemplate.nativeapptemplatefree
 
-import android.content.Intent
 import android.graphics.Color
-import android.nfc.NdefMessage
-import android.nfc.NfcAdapter
-import android.os.Build.VERSION.SDK_INT
 import android.os.Bundle
 import androidx.activity.ComponentActivity
 import androidx.activity.SystemBarStyle
@@ -26,14 +22,11 @@ import com.nativeapptemplate.nativeapptemplatefree.MainActivityUiState.Success
 import com.nativeapptemplate.nativeapptemplatefree.data.login.LoginRepository
 import com.nativeapptemplate.nativeapptemplatefree.designsystem.theme.NatTheme
 import com.nativeapptemplate.nativeapptemplatefree.model.DarkThemeConfig
-import com.nativeapptemplate.nativeapptemplatefree.model.ItemTagInfoFromNdefMessage
 import com.nativeapptemplate.nativeapptemplatefree.ui.app_root.NatApp
 import com.nativeapptemplate.nativeapptemplatefree.ui.app_root.rememberNatAppState
 import com.nativeapptemplate.nativeapptemplatefree.utils.NetworkMonitor
-import com.nativeapptemplate.nativeapptemplatefree.utils.Utility
 import dagger.hilt.android.AndroidEntryPoint
 import kotlinx.coroutines.launch
-import java.util.Date
 import javax.inject.Inject
 
 @AndroidEntryPoint
@@ -51,16 +44,6 @@ class MainActivity : ComponentActivity() {
     val splashScreen = installSplashScreen()
     super.onCreate(savedInstanceState)
 
-    viewModel.updateShouldNavigateToScanView(false)
-    viewModel.updateShouldFetchItemTagForShowTagInfoScan(false)
-    viewModel.updateShouldCompleteItemTagForCompleteScan(false)
-    viewModel.initScanViewSelectedTabIndex()
-    viewModel.initShowTagInfoScanResult()
-    viewModel.initCompleteScanResult()
-
-//    viewModel.updateDidShowTapShopBelowTip(false)
-//    viewModel.updateDidShowReadInstructionsTip(false)
-
     // Update the uiState
     lifecycleScope.launch {
       lifecycle.repeatOnLifecycle(Lifecycle.State.STARTED) {
@@ -117,86 +100,12 @@ class MainActivity : ComponentActivity() {
         NatApp(appState)
       }
     }
-
-    if (!uiState.isLoggedIn) return
-
-    val intent = intent
-    if (NfcAdapter.ACTION_NDEF_DISCOVERED == intent.action) {
-      viewModel.updateShouldNavigateToScanView(false)
-
-      val ndefMessage: NdefMessage?
-      val rawMessages = if (SDK_INT >= 33) { // TIRAMISU
-        intent.getParcelableArrayExtra(
-          NfcAdapter.EXTRA_NDEF_MESSAGES,
-          NdefMessage::class.java,
-        )
-      } else {
-        @Suppress("DEPRECATION")
-        intent.getParcelableArrayExtra(NfcAdapter.EXTRA_NDEF_MESSAGES)
-      }
-
-      if (!rawMessages.isNullOrEmpty()) {
-        ndefMessage = rawMessages[0] as NdefMessage
-
-        val itemTagInfoFromNdefMessage = Utility.extractItemTagInfoFrom(
-          context = this,
-          ndefMessage = ndefMessage,
-        )
-
-        updateItemTagInfoFromNdefMessage(itemTagInfoFromNdefMessage)
-        viewModel.initScanViewSelectedTabIndex()
-        viewModel.updateShouldNavigateToScanView(true)
-      }
-    }
-  }
-
-  override fun onNewIntent(intent: Intent) {
-    super.onNewIntent(intent)
-
-    if (!uiState.isLoggedIn) return
-
-    if (NfcAdapter.ACTION_NDEF_DISCOVERED == intent.action) {
-      viewModel.updateShouldNavigateToScanView(false)
-
-      val ndefMessage: NdefMessage?
-      val rawMessages = if (SDK_INT >= 33) { // TIRAMISU
-        intent.getParcelableArrayExtra(
-          NfcAdapter.EXTRA_NDEF_MESSAGES,
-          NdefMessage::class.java,
-        )
-      } else {
-        @Suppress("DEPRECATION")
-        intent.getParcelableArrayExtra(NfcAdapter.EXTRA_NDEF_MESSAGES)
-      }
-
-      if (!rawMessages.isNullOrEmpty()) {
-        ndefMessage = rawMessages[0] as NdefMessage
-
-        val itemTagInfoFromNdefMessage = Utility.extractItemTagInfoFrom(
-          context = this,
-          ndefMessage = ndefMessage,
-        )
-
-        updateItemTagInfoFromNdefMessage(itemTagInfoFromNdefMessage)
-        viewModel.initScanViewSelectedTabIndex()
-        viewModel.updateShouldNavigateToScanView(true)
-      }
-    }
   }
 
   override fun onResume() {
     super.onResume()
     viewModel.updatePermissions()
   }
-
-  private fun updateItemTagInfoFromNdefMessage(itemTagInfoFromNdefMessage: ItemTagInfoFromNdefMessage) {
-    if (itemTagInfoFromNdefMessage.success) {
-      itemTagInfoFromNdefMessage.scannedAt = Date().toInstant().toString()
-    }
-
-    viewModel.updateItemTagInfoFromNdefMessage(itemTagInfoFromNdefMessage)
-    viewModel.updateShouldCompleteItemTagForCompleteScan(itemTagInfoFromNdefMessage.success)
-  }
 }
 
 /**

app/src/main/kotlin/com/nativeapptemplate/nativeapptemplatefree/MainActivityViewModel.kt

@@ -5,13 +5,8 @@ import androidx.lifecycle.ViewModel
 import androidx.lifecycle.viewModelScope
 import com.nativeapptemplate.nativeapptemplatefree.MainActivityUiState.Loading
 import com.nativeapptemplate.nativeapptemplatefree.MainActivityUiState.Success
-import com.nativeapptemplate.nativeapptemplatefree.common.errors.codedDescription
 import com.nativeapptemplate.nativeapptemplatefree.data.login.LoginRepository
-import com.nativeapptemplate.nativeapptemplatefree.model.CompleteScanResult
-import com.nativeapptemplate.nativeapptemplatefree.model.CompleteScanResultType
-import com.nativeapptemplate.nativeapptemplatefree.model.ItemTagInfoFromNdefMessage
 import com.nativeapptemplate.nativeapptemplatefree.model.Permissions
-import com.nativeapptemplate.nativeapptemplatefree.model.ShowTagInfoScanResult
 import com.nativeapptemplate.nativeapptemplatefree.model.UserData
 import dagger.hilt.android.lifecycle.HiltViewModel
 import kotlinx.coroutines.flow.Flow
@@ -37,54 +32,12 @@ class MainActivityViewModel @Inject constructor(
     started = SharingStarted.WhileSubscribed(5_000),
   )
 
-  fun updateShouldFetchItemTagForShowTagInfoScan(shouldFetchItemTagForShowTagInfoScan: Boolean) {
-    viewModelScope.launch {
-      loginRepository.setShouldFetchItemTagForShowTagInfoScan(shouldFetchItemTagForShowTagInfoScan)
-    }
-  }
-
-  fun updateShouldCompleteItemTagForCompleteScan(shouldCompleteItemTagForCompleteScan: Boolean) {
-    viewModelScope.launch {
-      loginRepository.setShouldCompleteItemTagForCompleteScan(shouldCompleteItemTagForCompleteScan)
-    }
-  }
-
-  fun updateShouldNavigateToScanView(shouldNavigateToScanView: Boolean) {
-    viewModelScope.launch {
-      loginRepository.setShouldNavigateToScanView(shouldNavigateToScanView)
-    }
-  }
-
-  fun initScanViewSelectedTabIndex() {
-    viewModelScope.launch {
-      loginRepository.setScanViewSelectedTabIndex(0)
-    }
-  }
-
-  fun initShowTagInfoScanResult() {
-    viewModelScope.launch {
-      loginRepository.setShowTagInfoScanResult(ShowTagInfoScanResult())
-    }
-  }
-
-  fun initCompleteScanResult() {
-    viewModelScope.launch {
-      loginRepository.setCompleteScanResult(CompleteScanResult())
-    }
-  }
-
   fun updateDidShowTapShopBelowTip(didShowTapShopBelowTip: Boolean) {
     viewModelScope.launch {
       loginRepository.setDidShowTapShopBelowTip(didShowTapShopBelowTip)
     }
   }
 
-  fun updateDidShowReadInstructionsTip(didShowReadInstructionsTip: Boolean) {
-    viewModelScope.launch {
-      loginRepository.setDidShowReadInstructionsTip(didShowReadInstructionsTip)
-    }
-  }
-
   fun updatePermissions() {
     viewModelScope.launch {
       val isLoggedIn = loginRepository.isLoggedIn().first()
@@ -110,30 +63,6 @@ class MainActivityViewModel @Inject constructor(
       }
     }
   }
-
-  fun updateItemTagInfoFromNdefMessage(
-    itemTagInfoFromNdefMessage: ItemTagInfoFromNdefMessage,
-  ) {
-    viewModelScope.launch {
-      val completeScanResult = CompleteScanResult()
-      completeScanResult.itemTagInfoFromNdefMessage = itemTagInfoFromNdefMessage
-
-      if (!completeScanResult.itemTagInfoFromNdefMessage.success) {
-        completeScanResult.message = itemTagInfoFromNdefMessage.message
-        completeScanResult.completeScanResultType = CompleteScanResultType.Failed
-      }
-
-      try {
-        loginRepository.setCompleteScanResult(completeScanResult)
-      } catch (exception: Exception) {
-        val message = exception.codedDescription
-        completeScanResult.message = message
-        completeScanResult.completeScanResultType = CompleteScanResultType.Failed
-
-        loginRepository.setCompleteScanResult(completeScanResult)
-      }
-    }
-  }
 }
 
 sealed interface MainActivityUiState {

app/src/main/kotlin/com/nativeapptemplate/nativeapptemplatefree/NatConstants.kt

@@ -1,9 +1,6 @@
 package com.nativeapptemplate.nativeapptemplatefree
 
 object NatConstants {
-  const val SCAN_PATH: String = "scan"
-  const val SCAN_PATH_CUSTOMER: String = "scan_customer"
-
   const val SUPPORT_MAIL: String = "support@nativeapptemplate.com"
   const val HOW_TO_USE_URL: String = "https://myturntag.com/how"
   const val SUPPORT_WEBSITE_URL: String = "https://nativeapptemplate.com"

app/src/main/kotlin/com/nativeapptemplate/nativeapptemplatefree/common/errors/NfcError.kt

@@ -45,8 +45,8 @@ interface ItemTagApi {
     @Path("id") id: String,
   ): ApiResponse<ItemTag>
 
-  @PATCH("{account_id}/api/v1/shopkeeper/item_tags/{id}/reset")
-  suspend fun resetItemTag(
+  @PATCH("{account_id}/api/v1/shopkeeper/item_tags/{id}/idle")
+  suspend fun idleItemTag(
     @Path("account_id") accountId: String,
     @Path("id") id: String,
   ): ApiResponse<ItemTag>

app/src/main/kotlin/com/nativeapptemplate/nativeapptemplatefree/data/item_tag/ItemTagApi.kt

@@ -31,7 +31,7 @@ interface ItemTagRepository {
     id: String,
   ): Flow<ItemTag>
 
-  fun resetItemTag(
+  fun idleItemTag(
     id: String,
   ): Flow<ItemTag>
 }

app/src/main/kotlin/com/nativeapptemplate/nativeapptemplatefree/data/item_tag/ItemTagRepository.kt

@@ -77,10 +77,10 @@ class ItemTagRepositoryImpl @Inject constructor(
     emitApiResponse(response)
   }.flowOn(ioDispatcher)
 
-  override fun resetItemTag(
+  override fun idleItemTag(
     id: String,
   ) = flow {
-    val response = api.resetItemTag(mtcPreferencesDataSource.userData.first().accountId, id)
+    val response = api.idleItemTag(mtcPreferencesDataSource.userData.first().accountId, id)
     emitApiResponse(response)
   }.flowOn(ioDispatcher)
 }

app/src/main/kotlin/com/nativeapptemplate/nativeapptemplatefree/data/item_tag/ItemTagRepositoryImpl.kt

@@ -20,18 +20,6 @@ interface LoginRepository {
 
   fun updateConfirmedTermsVersion(): Flow<Boolean>
 
-  suspend fun setShouldFetchItemTagForShowTagInfoScan(shouldFetchItemTagForShowTagInfoScan: Boolean)
-
-  suspend fun setShouldCompleteItemTagForCompleteScan(shouldCompleteItemTagForCompleteScan: Boolean)
-
-  suspend fun setShouldNavigateToScanView(shouldNavigateToScanView: Boolean)
-
-  suspend fun setScanViewSelectedTabIndex(scanViewSelectedTabIndex: Int)
-
-  suspend fun setCompleteScanResult(completeScanResult: CompleteScanResult)
-
-  suspend fun setShowTagInfoScanResult(showTagInfoScanResult: ShowTagInfoScanResult)
-
   suspend fun setAccountId(accountId: String)
 
   suspend fun setShopkeeper(loggedInShopkeeper: LoggedInShopkeeper)
@@ -42,8 +30,6 @@ interface LoginRepository {
 
   suspend fun setDidShowTapShopBelowTip(didShowTapShopBelowTip: Boolean)
 
-  suspend fun setDidShowReadInstructionsTip(didShowReadInstructionsTip: Boolean)
-
   suspend fun setDarkThemeConfig(darkThemeConfig: DarkThemeConfig)
 
   suspend fun setIsEmailUpdated(isEmailUpdated: Boolean)
@@ -70,19 +56,5 @@ interface LoginRepository {
 
   fun didShowTapShopBelowTip(): Flow<Boolean>
 
-  fun didShowReadInstructionsTip(): Flow<Boolean>
-
   fun getMaximumQueueNumberLength(): Flow<Int>
-
-  fun shouldFetchItemTagForShowTagInfoScan(): Flow<Boolean>
-
-  fun shouldCompleteItemTagForCompleteScan(): Flow<Boolean>
-
-  fun shouldNavigateToScanView(): Flow<Boolean>
-
-  fun scanViewSelectedTabIndex(): Flow<Int>
-
-  fun completeScanResult(): Flow<CompleteScanResult>
-
-  fun showTagInfoScanResult(): Flow<ShowTagInfoScanResult>
 }