Show signer of installed version in technical info

app/src/main/kotlin/org/fdroid/ui/details/AppDetailsItem.kt

@@ -50,6 +50,10 @@ data class AppDetailsItem(
      */
     val installedVersionCode: Long? = null,
     val installedVersionName: String? = null,
+    /**
+     * Needed, because the [installedVersion] may not be available, e.g. not version from any repo.
+     */
+    val installedSigner: String? = null,
     /**
      * The currently suggested version for installation.
      */
@@ -78,6 +82,7 @@ data class AppDetailsItem(
         installedVersion: AppVersion?,
         installedVersionCode: Long?,
         installedVersionName: String?,
+        installedSigner: String?,
         suggestedVersion: AppVersion?,
         possibleUpdate: AppVersion?,
         appPrefs: AppPrefs?,
@@ -117,6 +122,7 @@ data class AppDetailsItem(
         installedVersion = installedVersion,
         installedVersionCode = installedVersionCode,
         installedVersionName = installedVersionName,
+        installedSigner = installedSigner,
         suggestedVersion = suggestedVersion,
         possibleUpdate = possibleUpdate,
         appPrefs = appPrefs,

app/src/main/kotlin/org/fdroid/ui/details/DetailsPresenter.kt

@@ -239,6 +239,7 @@ fun DetailsPresenter(
         installedVersion = installedVersion,
         installedVersionCode = installedVersionCode,
         installedVersionName = packageInfo?.versionName,
+        installedSigner = installedSigner,
         suggestedVersion = suggestedVersion,
         possibleUpdate = possibleUpdate,
         appPrefs = appPrefs,

app/src/main/kotlin/org/fdroid/ui/details/TechnicalInfo.kt

@@ -44,6 +44,18 @@ fun TechnicalInfo(item: AppDetailsItem) {
                 }
             }
         }
+        val signer = item.installedSigner
+        if (signer != null) Row {
+            SelectionContainer {
+                Text(
+                    text = stringResource(
+                        R.string.signer_colon,
+                        signer.substring(0..15)
+                    ),
+                    style = MaterialTheme.typography.bodyMedium,
+                )
+            }
+        }
     }
 }