Send Kavita client info headers

src/all/kavita/build.gradle

@@ -2,7 +2,7 @@ ext {
     kmkVersionCode = 1
     extName = 'Kavita'
     extClass = '.KavitaFactory'
-    extVersionCode = 29
+    extVersionCode = 30
     isNsfw = false
 }
 

src/all/kavita/src/eu/kanade/tachiyomi/extension/all/kavita/Kavita.kt

@@ -84,6 +84,7 @@ import java.io.IOException
 import java.security.MessageDigest
 import java.util.Calendar
 import java.util.Locale
+import java.util.UUID
 import java.util.concurrent.ConcurrentHashMap
 import kotlin.let
 import kotlin.runCatching
@@ -122,6 +123,7 @@ class Kavita(private val suffix: String = "") : ConfigurableSource, UnmeteredSou
     private val preferences: SharedPreferences by lazy {
         Injekt.get<Application>().getSharedPreferences("source_$id", 0x0000)
     }
+    private val application: Application by lazy { Injekt.get() }
     override val name = "${KavitaInt.KAVITA_NAME} (${preferences.getString(KavitaConstants.customSourceNamePref, suffix)})"
     override val lang = "all"
     override val supportsLatest = true
@@ -2086,6 +2088,8 @@ class Kavita(private val suffix: String = "") : ConfigurableSource, UnmeteredSou
         }
         return Headers.Builder()
             .add("User-Agent", "Tachiyomi Kavita v${AppInfo.getVersionName()}")
+            .add("X-Kavita-Client", kavitaClientHeader())
+            .add("X-Device-Id", deviceFingerprint())
             .add("Content-Type", "application/json")
             .add("Authorization", "Bearer $jwtToken")
     }
@@ -2093,10 +2097,38 @@ class Kavita(private val suffix: String = "") : ConfigurableSource, UnmeteredSou
     private fun setupLoginHeaders(): Headers.Builder {
         return Headers.Builder()
             .add("User-Agent", "Tachiyomi Kavita v${AppInfo.getVersionName()}")
+            .add("X-Kavita-Client", kavitaClientHeader())
+            .add("X-Device-Id", deviceFingerprint())
             .add("Content-Type", "application/json")
             .add("Authorization", "Bearer $jwtToken")
     }
 
+    private fun kavitaClientHeader(): String {
+        val resources = application.resources
+        val configuration = resources.configuration
+        val metrics = resources.displayMetrics
+        val screenWidth = metrics.widthPixels.coerceAtLeast(0)
+        val screenHeight = metrics.heightPixels.coerceAtLeast(0)
+        val smallestWidthDp = configuration.smallestScreenWidthDp
+        val deviceType = when {
+            smallestWidthDp >= 600 -> "Tablet"
+            else -> "Mobile"
+        }
+        val orientation = if (screenWidth > screenHeight) "landscape" else "portrait"
+
+        return "web-app/${AppInfo.getVersionName()} (Kavita Extension/${AppInfo.getVersionName()}; Android; $deviceType; ${screenWidth}x$screenHeight; $orientation)"
+    }
+
+    private fun deviceFingerprint(): String {
+        val key = "kavita_extension_device_id"
+        val existing = preferences.getString(key, null)
+        if (!existing.isNullOrBlank()) return existing
+
+        val generated = UUID.randomUUID().toString()
+        preferences.edit().putString(key, generated).apply()
+        return generated
+    }
+
     override fun setupPreferenceScreen(screen: PreferenceScreen) {
         val opdsAddressPref = screen.editTextPreference(
             ADDRESS_TITLE,