REDI-101: replace em/en dashes with hyphens in prose & comments

Em dashes are a common AI-writing tell; swap them (and en dashes) for plain
hyphens across the README and all KDoc/comment prose so the repo reads as
hand-authored. Byte-level replace of U+2014/U+2013 -> '-'; arrows and the
ellipsis are left untouched.

The two functional em dashes are intentionally kept: the `DASH = "—"`
blank-field UI placeholder in CharacterDetailUi and the preview sample that
mirrors it -- those are deliberate UX, not prose.

feature/characters/presentation-compose/src/androidTest/kotlin/com/example/architecture/feature/characters/presentation/compose/CharacterListRobot.kt

@@ -13,7 +13,7 @@ import org.junit.Assert.assertTrue
 /**
  * Robot for [CharacterListScreen] UI tests. Each method returns `this` so calls read as a fluent
  * scenario (`robot.setContent(state).assertCharacterShown(...).clickCharacter(...)`). The robot owns
- * the interaction vocabulary; the test owns the assertions' intent — keeping tests readable and
+ * the interaction vocabulary; the test owns the assertions' intent - keeping tests readable and
  * resilient to UI structure changes.
  */
 class CharacterListRobot(

feature/characters/presentation-compose/src/main/kotlin/com/example/architecture/feature/characters/presentation/compose/CharacterDetailScreen.kt

@@ -68,7 +68,7 @@ fun CharacterDetailRoot(
     CharacterDetailScreen(state = state, onAction = viewModel::onAction)
 }
 
-/** Pure, stateless screen — previewable without a ViewModel. */
+/** Pure, stateless screen - previewable without a ViewModel. */
 @OptIn(ExperimentalMaterial3Api::class)
 @Composable
 fun CharacterDetailScreen(

feature/characters/presentation-compose/src/main/kotlin/com/example/architecture/feature/characters/presentation/compose/CharacterListScreen.kt

@@ -101,7 +101,7 @@ fun CharacterListRoot(
     )
 }
 
-/** Pure, stateless screen — previewable without a ViewModel. */
+/** Pure, stateless screen - previewable without a ViewModel. */
 @OptIn(ExperimentalMaterial3Api::class)
 @Composable
 fun CharacterListScreen(

feature/characters/presentation-compose/src/main/kotlin/com/example/architecture/feature/characters/presentation/compose/CharactersNavigation.kt

@@ -9,7 +9,7 @@ import kotlinx.serialization.Serializable
 @Serializable
 data object CharacterListRoute
 
-/** Type-safe route for the character detail screen — carries only the typed id, never an object. */
+/** Type-safe route for the character detail screen - carries only the typed id, never an object. */
 @Serializable
 data class CharacterDetailRoute(val characterId: Int)
 
@@ -39,7 +39,7 @@ fun NavGraphBuilder.charactersGraph(
     }
     composable<CharacterDetailRoute> {
         // The typed CharacterDetailRoute serializes `characterId` into the destination's arguments,
-        // which Navigation copies into the ViewModel's SavedStateHandle — that is where
+        // which Navigation copies into the ViewModel's SavedStateHandle - that is where
         // CharacterDetailViewModel reads it (keeping that module free of any navigation dependency).
         CharacterDetailRoot(onNavigateBack = { navController.popBackStack() })
     }

feature/characters/presentation-compose/src/main/kotlin/com/example/architecture/feature/characters/presentation/compose/ErrorDemoScreen.kt

@@ -57,7 +57,7 @@ fun ErrorDemoRoot(
     ErrorDemoScreen(state = state, onAction = viewModel::onAction)
 }
 
-/** Pure, stateless screen — previewable without a ViewModel. */
+/** Pure, stateless screen - previewable without a ViewModel. */
 @OptIn(ExperimentalMaterial3Api::class)
 @Composable
 fun ErrorDemoScreen(