Treat JSON null city/country/date as absent

The overlay showed 'null, null' for photos without location because
JSONObject.optString returns the string "null" for JSON null.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_012BvT3RjNpBmMUsyPqHq7fm

app/build.gradle.kts

@@ -14,8 +14,8 @@ android {
         applicationId = "cloud.alexandrevazquez.immichtv"
         minSdk = 26
         targetSdk = 35
-        versionCode = 2
-        versionName = "1.1.0"
+        versionCode = 3
+        versionName = "1.1.1"
     }
 
     signingConfigs {

app/src/main/kotlin/cloud/alexandrevazquez/immichtv/data/ImmichApi.kt

@@ -104,13 +104,17 @@ class ImmichApi(baseUrl: String, private val apiKey: String) {
             width = w,
             height = h,
             fileName = o.optString("originalFileName", ""),
-            takenAt = o.optString("localDateTime").ifBlank { exif?.optString("dateTimeOriginal") }?.ifBlank { null },
-            city = exif?.optString("city")?.ifBlank { null },
-            country = exif?.optString("country")?.ifBlank { null },
+            takenAt = o.str("localDateTime") ?: exif?.str("dateTimeOriginal"),
+            city = exif?.str("city"),
+            country = exif?.str("country"),
             durationMs = parseDuration(o.opt("duration")),
         )
     }
 
+    /** Like optString but treats JSON null and blank as absent instead of returning "null". */
+    private fun JSONObject.str(key: String): String? =
+        if (isNull(key)) null else optString(key).ifBlank { null }
+
     private fun get(url: String): String = execute(Request.Builder().url(url).get().build())
 
     private fun post(url: String, body: JSONObject): String = execute(