Rename the product display branding to Graduately.

Update app titles, installers, and welcome copy while keeping technical package IDs and updater artifact names.

Co-authored-by: Cursor <cursoragent@cursor.com>

android/app/src/main/AndroidManifest.xml

@@ -7,7 +7,7 @@
     <application
         android:allowBackup="true"
         android:icon="@mipmap/ic_launcher"
-        android:label="maturita.c"
+        android:label="@string/app_name"
         android:roundIcon="@mipmap/ic_launcher_round"
         android:supportsRtl="true"
         android:theme="@style/Theme.Maturita"

android/app/src/main/java/org/maturita/maturita/MainActivity.kt

@@ -75,7 +75,7 @@ class MainActivity : ComponentActivity() {
     private fun crashView(dump: String, retry: () -> Unit): LinearLayout {
         val pad = (20 * resources.displayMetrics.density).toInt()
         val title = TextView(this).apply {
-            text = "maturita.c spadla"
+            text = "Graduately spadla"
             setTextSize(TypedValue.COMPLEX_UNIT_SP, 22f)
             setPadding(0, 0, 0, pad / 2)
         }

android/app/src/main/java/org/maturita/maturita/ui/Screens.kt

@@ -90,7 +90,7 @@ import org.maturita.maturita.data.themePalette
 fun HomeScreen(vm: AppViewModel) {
     val sum = summarize(vm.content, vm.progress)
     val pct = if (sum.totalEx == 0) 0f else sum.doneEx / sum.totalEx.toFloat()
-    RootScaffold(vm, "Maturita") {
+    RootScaffold(vm, "Graduately") {
         if (vm.showChangelog) {
             item { ChangelogCard(vm) }
         }

android/app/src/main/res/values/strings.xml

@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <string name="app_name">Graduately</string>
+</resources>