fix: Resolve build errors

- Add missing quantity field to Item model
- Add missing string resources and translations
- Fix unresolved references in UI screens

app/src/main/java/com/homebox/lens/MainApplication.kt

@@ -1,20 +1,28 @@
 // [PACKAGE] com.homebox.lens
 // [FILE] MainApplication.kt
+// [SEMANTICS] android, application, hilt, timber
 
 package com.homebox.lens
 
+// [IMPORTS]
 import android.app.Application
 import dagger.hilt.android.HiltAndroidApp
 import timber.log.Timber
+// [END_IMPORTS]
 
 // [CONTRACT]
-
+// [ENTITY: Application('MainApplication')]
+// [RELATION: Application('MainApplication') -> [INHERITS_FROM] -> Class('Application')]
+// [RELATION: Application('MainApplication') -> [DEPENDS_ON] -> Annotation('HiltAndroidApp')]
 /**
  * [ENTITY: Application('MainApplication')]
  * [PURPOSE] Точка входа в приложение. Инициализирует Hilt и Timber.
  */
 @HiltAndroidApp
 class MainApplication : Application() {
+    // [ENTITY: Function('onCreate')]
+    // [RELATION: Function('onCreate') -> [CALLS] -> Function('super.onCreate')]
+    // [RELATION: Function('onCreate') -> [CALLS] -> Function('Timber.plant')]
     // [LIFECYCLE]
     override fun onCreate() {
         super.onCreate()
@@ -23,6 +31,9 @@ class MainApplication : Application() {
             Timber.plant(Timber.DebugTree())
         }
     }
+    // [END_ENTITY: Function('onCreate')]
 }
+// [END_ENTITY: Application('MainApplication')]
 
-// [END_FILE_MainApplication.kt]
+// [END_CONTRACT]
+// [END_FILE_MainApplication.kt]