Title/subtitle style update (#775)

## Description
This PR updates cards that have a title and subtitle, so that they are
visually distinct instead of sharing the same font and style.
Titles use bodyMedium typography with semiBold weight. 
Subtitles use bodySmall typography with normal weight.

This affects:
- PersonCard
- EpisodeCard
- DiscoverItemCard
- GridCard
- SeasonCard

### Related issues
Related to [735](https://github.com/damontecres/Wholphin/issues/735)

### Screenshots
<img width="960" height="540" alt="Screenshot_20260125_190057"
src="https://github.com/user-attachments/assets/4bbf29a3-3df8-482b-944e-454a9b091e44"
/>

### AI/LLM usage
No LLM usage

app/src/main/java/com/github/damontecres/wholphin/ui/cards/DiscoverItemCard.kt

@@ -27,6 +27,7 @@ import androidx.compose.ui.graphics.Color
 import androidx.compose.ui.layout.ContentScale
 import androidx.compose.ui.res.pluralStringResource
 import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.text.font.FontWeight
 import androidx.compose.ui.text.style.TextAlign
 import androidx.compose.ui.unit.Dp
 import androidx.compose.ui.unit.dp
@@ -183,6 +184,8 @@ fun DiscoverItemCard(
                 text = item?.title ?: "",
                 maxLines = 1,
                 textAlign = TextAlign.Center,
+                style = MaterialTheme.typography.bodyMedium,
+                fontWeight = FontWeight.SemiBold,
                 modifier =
                     Modifier
                         .fillMaxWidth()
@@ -193,6 +196,8 @@ fun DiscoverItemCard(
                 text = item?.releaseDate?.year?.toString() ?: "",
                 maxLines = 1,
                 textAlign = TextAlign.Center,
+                style = MaterialTheme.typography.bodySmall,
+                fontWeight = FontWeight.Normal,
                 modifier =
                     Modifier
                         .fillMaxWidth()

app/src/main/java/com/github/damontecres/wholphin/ui/cards/EpisodeCard.kt

@@ -22,11 +22,13 @@ import androidx.compose.runtime.setValue
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.text.font.FontWeight
 import androidx.compose.ui.text.style.TextAlign
 import androidx.compose.ui.unit.Dp
 import androidx.compose.ui.unit.dp
 import androidx.tv.material3.Card
 import androidx.tv.material3.CardDefaults
+import androidx.tv.material3.MaterialTheme
 import androidx.tv.material3.Text
 import com.github.damontecres.wholphin.data.model.BaseItem
 import com.github.damontecres.wholphin.ui.AppColors
@@ -130,6 +132,8 @@ fun EpisodeCard(
                 text = dto?.seriesName ?: "",
                 maxLines = 1,
                 textAlign = TextAlign.Center,
+                style = MaterialTheme.typography.bodyMedium,
+                fontWeight = FontWeight.SemiBold,
                 modifier =
                     Modifier
                         .fillMaxWidth()
@@ -140,6 +144,8 @@ fun EpisodeCard(
                 text = item?.name ?: "",
                 maxLines = 1,
                 textAlign = TextAlign.Center,
+                style = MaterialTheme.typography.bodySmall,
+                fontWeight = FontWeight.Normal,
                 modifier =
                     Modifier
                         .fillMaxWidth()

app/src/main/java/com/github/damontecres/wholphin/ui/cards/GridCard.kt

@@ -19,6 +19,7 @@ import androidx.compose.runtime.setValue
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.graphics.Color
 import androidx.compose.ui.layout.ContentScale
+import androidx.compose.ui.text.font.FontWeight
 import androidx.compose.ui.text.style.TextAlign
 import androidx.compose.ui.text.style.TextOverflow
 import androidx.compose.ui.unit.dp
@@ -113,6 +114,8 @@ fun GridCard(
                     text = item?.title ?: "",
                     maxLines = 1,
                     textAlign = TextAlign.Center,
+                    style = MaterialTheme.typography.bodyMedium,
+                    fontWeight = FontWeight.SemiBold,
                     overflow = TextOverflow.Ellipsis,
                     modifier =
                         Modifier
@@ -124,6 +127,8 @@ fun GridCard(
                     text = item?.subtitle ?: "",
                     maxLines = 1,
                     textAlign = TextAlign.Center,
+                    style = MaterialTheme.typography.bodySmall,
+                    fontWeight = FontWeight.Normal,
                     modifier =
                         Modifier
                             .fillMaxWidth()

app/src/main/java/com/github/damontecres/wholphin/ui/cards/PersonCard.kt

@@ -26,6 +26,7 @@ import androidx.compose.ui.draw.clip
 import androidx.compose.ui.graphics.Color
 import androidx.compose.ui.layout.ContentScale
 import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.text.font.FontWeight
 import androidx.compose.ui.text.style.TextAlign
 import androidx.compose.ui.unit.dp
 import androidx.compose.ui.unit.sp
@@ -174,6 +175,8 @@ fun PersonCard(
                 text = name ?: "",
                 maxLines = 1,
                 textAlign = TextAlign.Center,
+                style = MaterialTheme.typography.bodyMedium,
+                fontWeight = FontWeight.SemiBold,
                 modifier =
                     Modifier
                         .fillMaxWidth()
@@ -185,6 +188,8 @@ fun PersonCard(
                     text = role,
                     maxLines = 1,
                     textAlign = TextAlign.Center,
+                    style = MaterialTheme.typography.bodySmall,
+                    fontWeight = FontWeight.Normal,
                     modifier =
                         Modifier
                             .fillMaxWidth()

app/src/main/java/com/github/damontecres/wholphin/ui/cards/SeasonCard.kt

@@ -19,11 +19,13 @@ import androidx.compose.runtime.remember
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.graphics.Color
 import androidx.compose.ui.platform.LocalDensity
+import androidx.compose.ui.text.font.FontWeight
 import androidx.compose.ui.text.style.TextAlign
 import androidx.compose.ui.unit.Dp
 import androidx.compose.ui.unit.dp
 import androidx.tv.material3.Card
 import androidx.tv.material3.CardDefaults
+import androidx.tv.material3.MaterialTheme
 import androidx.tv.material3.Text
 import com.github.damontecres.wholphin.data.model.BaseItem
 import com.github.damontecres.wholphin.ui.AspectRatios
@@ -178,6 +180,8 @@ fun SeasonCard(
                 text = title ?: "",
                 maxLines = 1,
                 textAlign = TextAlign.Center,
+                style = MaterialTheme.typography.bodyMedium,
+                fontWeight = FontWeight.SemiBold,
                 modifier =
                     Modifier
                         .fillMaxWidth()
@@ -188,6 +192,8 @@ fun SeasonCard(
                 text = subtitle ?: "",
                 maxLines = 1,
                 textAlign = TextAlign.Center,
+                style = MaterialTheme.typography.bodySmall,
+                fontWeight = FontWeight.Normal,
                 modifier =
                     Modifier
                         .fillMaxWidth()